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The small galaxy NGC 5643, about 34 mill light years away in Lupus constellation. It's a Seyfert tipe galaxy. LRGB composite for 5 hours. GSO RC 30cms scope, camera STF8300/ AO-8, subframes of 12 min from my backyard observatory at La Colonia, Illapel, Chile. Not often imaged...
Manufacturer: British Motor Corporation Limited (BMC), Longbridge - UK
Type: Sprite Mk I (AN5) (Frogeye-Bugeye-Froschauge)
Production time: mid-year 1958 - mid-year 1961
Production outlet: 48,987
Engine: 948cc straight-4 BMC Austin A-series 948 OHV
Power: 42.5 bhp / 5.000 rpm
Torque: 71 Nm / 3.000 rpm
Drivetrain: rear wheels
Speed: 133 km/h
Curb weight: 670 kg
Wheelbase: 80 inch
Chassis: all steel mono-construction with front engine subframe and welded all-steel body
Steering: rack & pinion
Gearbox: close-ratio four-speed manual / II, III and IV synchronized / floor shift
Clutch: 6½ inch single dry plate disc hydraulically operated
Carburettor: twin 1 ⅛ " SU H1 semi-downdraft
Fuel tank: 27 liter
Electric system: Lucas 12 Volts 43 Ah
Ignition system: distributor and coil with auto and vacuum control
Brakes front: Lockheed 7 inch hydraulic drums (2-leading shoe type)
Brakes rear: Lockheed 7 inch hydraulic drums
Suspension front: inmdependent wishbones, rapezoidal triangle cross-guides, helical springs + hydraulic Armstrong lever type shock absorbers (no shock absorbers mounted at the very early models)
Suspension rear: beam axle, radius arms, Panhard rod, anti-roll bar, 2 longitudinal links, 4 quarter-elliptic leaf springs + hydraulic Armstrong lever type shock absorbers
Rear axle: live three-quarter floating banjo type
Differential: hypoid 4.222:1
Wheels: 13 inch pressed steel discs four-nut fixing
Tires: 5.20 x 13 4-ply tubeless
Options: 948cc straight-4 BMC Austin A-series 948 OHV with Shorrock-Supercharger (59bhp, 87Nm, twin SU HS2 carburettors, top speed 148 km/h), factory hardtop, tonneau-cover, heater, demister, radio, wire spoke “knock-on” wheels, 6-ply tires, windscreen washer, rev.counter (when fitted incorporates headlamp high beam warning lamp), chromiun plated front bumper (standard on export models), laminated screen
Special:
- Austin-Healey was a British Sports Car maker founded in 1952 through a joint venture between the Austin division of the British Motor Corporation (BMC) and the Donald Healey Motor Company (Healey), a renowned automotive engineering and design firm. Leonard Lord represented BMC and Donald Healey his firm.
- BMC merged with Jaguar Cars in 1966 to form British Motor Holdings (BMH).
- Donald Healey left BMH in 1968 when it merged into British Leyland.
- Healey then joined Jensen Motors, which had been making bodies for the "big Healeys" since their inception in 1952, and became their chairman in 1972.
- Austin-Healey cars were produced until 1972 when the 20-year agreement between Healey and Austin came to an end.
- The Austin-Healey Sprite was designed by Donald Healey as a low-cost Sports Car and production began at MG's Abingdon factory in March of 1958. Later models were also assembled in Enfield, New South Wales and in Australia.
- A few months later, the new car was officially introduced in Monte Carlo, just prior to the Monte Carlo Rally.
- In the UK it's called "Frogeye", in the US "Bugeye" and in Germany "Froschauge".
- The headlights mounted on the top of hood were "lifted" because of U.S. Import legislations.
- Concealed flip-up headlamps were in the original drawings but high production costs canceled those plans.
- To build this little 2-door Roadster they used Austin, MG and Morris parts to keep the costs down.
- The two front chassis legs projecting forward from the passenger compartment mean the shell is not a full monocoque. The front sheet-metal assembly, including the bonnet (hood) and wings, was a one-piece unit, hinged from the back, that swung up to allow access to the engine compartment.
- The engine for example was also used in the Austin A35 and Morris Minor 1000 Series and the rack and pinion steering was derived from the Morris Minor 1000 Series and the front suspension from the Austin A35.
- It has no exterior door handles and no exterior boot lid (the back seats would need to be folded down to get access, incl. the spare tire).
- The entire front hood hinged upwards, allowing easy and convenient access to the engine.
- It was made at the MG works in Abingdon and sold for £669, so the intention of keeping the price low worked.
- By the quarter-elliptic rear springs, a simple self-supporting body and little weight, the Sprite is a rigid car to drive: But real fun to drive ☺☺!
- They are still very popular for club racing.
NGC 3718, also know as ARP 214, is a distorted spiral galaxy in the Constellation Ursa Major and is located about 59 Million Light Years away. Its distorted form is thought to be gravitational interaction with the other galaxy seen in this image - NGC 3729 - at some point in the distant past. These are all part of a group of galaxies known as the Ursa Major Cluster.
One interesting footnote - below NGC 3718 you can see a small grouping of elongated shapes, very close together. While not shown very well in this image, this is a small group 5 galaxies known as Hickson 56. These Galaxies are estimated to be about 400 Million Light Years away!
These galaxies are very far away and very small. The largest here only measure 2.9" x 2.4" in size. I mention this because I really don't have a scope that is setup for these very small galaxies. SO why did I chose this target? Well, part of me wanted to see what I could do with it. Another part is that this time of year the number of targets is a bit limited - especially what I can access due to the tree lines on my property.
This is the third and last image to come out of my 3 night imaging cycle starting on June 4th. While we had three clear nights, we also had some bands of thin clouds that came through and the overall sky transparency was far from great. The thin clouds are not enough to lose a guide star and disrupt your runs, but they can ruin the contrast on critical subframes. In this case, I had to remove roughly 1/3 of my subs and it reduced the number of Green frames I ended with to less than half what I had for the other channels.
When first processed this image - it looked pretty bad. So I went back to square one, and this time I spent a huge amount of time working on the image deconvolution step. Some people think of deconvolution as a "Sharpening" step. In fact it does something quite different. Working it the frequency domain, it attempt to restore lost information caused by the optics. This is very tricky to use properly and for my first year of astrophotography I could not get any good results out of this at all. Then I got some help from Gary Optiz and Dan Kutcha and I was able follow a "recipe" and get some small advantage to my images. This time though, I really dug into it - played around with every parameter and saw how it impacted the image. At the end of it all, I had finally figured out how to use it properly, and I had a version of the linear image that had more detail than I had before.
With this I went forward and processed the image doing the bulk of the work in Pixinsight, and then shifting to Photoshop for the last polishing phases. I also used Topaz Denoise AI, on a few trouble spots along the way.
In the end - I was happy with the final result - but I also knew that to get the results I really want here I need a few things: 1) a scope with more focal length and resolution 2) Clearer and more transparent skies. 3) and a lot more integration time.
Thanks for looking!
Pat
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Image Details
*Number of frames is after bad or questionable frames were culled.
53 x 120 seconds, bin 1x1 @ -15C, unity gain, ZWO Gen II L Filter
64 x 120 seconds, bin 1x1 @ -15C, Unity gain, ZWO Gen II R Filter
26 x 120 seconds, bin 1x1 @ -15C, unity gain, ZWO Gen II G Filter
46x 120 seconds, bin 1x1 @ -15C, unity gain, ZWO Gen II B Filter
Total of 6.3 hours
30 Darks at 300 seconds, bin 1x1, -10C, gain 100
30 Darks at 90 seconds, bin 1x1, -10C, gain 0
30 L Flats
30 R Flats
30 G Flats
30 B Flats
50 Bias
Capture Hardware:
Scope: William Optics 132mm F/7 FLT APO
Guide Scope: Sharpstar 66EDPHII
Camera: ZWO ASI1600mm-pro with ZWO Filter wheel with ZWO LRGB filter set,
and Astronomiks 6nm Narrowband filter set
Guide Camera: ZWO ASI290Mini
Focus Motor: Pegasus ZWO EAF 5V
Mount: Ioptron CEM 26
Polar Alignment: Ipolar camera
Software:
Capture Software: PHD2 Guider, Sequence Generator Pro controller
Image Processing: Pixinsight, Photoshop - assisted by Coffee, extensive processing indecision and second guessing, editor regret and much swearing….. Given the problems on this image, more than the usual whining….
Globular cluster M5 in Serpens Cauda.
This is an RGB integration of approx 30x180s subframes in each channel captured on a QHY163M camera, WO FLT110 and Optolong filters. Imaging was managed via SGP and PHD2, all post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand
Whilst Europe bakes in record breaking high temperatures, here in Wales we have another wet weekend.
The planetary nebula NGC2818, another southern target in the Pyxis constellation. This is an Ha L O3 RGB exposure for about 8.5 hrs; Scope GSO RC 30cms, camera Sbig STF8300/AO-8 operating at -35°C. 12 min subframes, from my backyard observatory at La Colonia, Illapel, Chile. This planetary nebula (PLN) doesn't belong to the open cluster (NGC 2818A), but have near the same distance to us.
La nebulosa planetaria denominada NGC2818 en la sureña constelación de Pyxis. No pertenece al cúmulo abierto (NGC 2818 A), sino que está por coincidencia a una distancia y línea de visión similares. Exposición con filtros Ha-L-O3 y RGB, subframes de 12 minutos, telescopio GSO RC de 30cms, cámara Sbig STF8300/AO-8 operando a -35°C, desde mi observatorio casero en La Colonia, Illapel, Chile.
I recently acquired a Starizona HyperStar for my Celestron C9.25 XLT telescope. The HyperStar replaces the secondary mirror on the SCT. It is a lens system that reduces the C9.25 focal length from 2350mm to 525mm and the focal ratio from f/10 to f/2.2. This effectively converts my narrow-field system into a very fast wide-field imaging setup. Using this accessory I can take high quality images of wide-field objects (comets, nebula, large galaxies) in significantly less time than my wide-field refractors (I have two refractors, an f/7 and an f/4.9).
My plan is to use the HyperStar to image Comets 2025/R2 (SWAN) and 2025/K6 (Lemmon) once they are at a "reasonable" elevation here in the SF Bay Area.
To prepare, I used Andromeda for my first light target to get some practice with the HyperStar. The image above is the result of 45 x 1-minute subs - 45 minutes! This detailed of an image would require 3-4 times the integration time using one of my refractors.
I am looking forward to trying the HyperStar to image one or both of the comets now in our vicinity. I am not making any promises, but I hope to post an image of at least one of the two comets within the next 2-3 weeks.
Date: October 18, 2025
Bortle Class 5 backyard, SF Bay Area (East Bay)
Capture: 45 x 1-minute subframes, OSC
Telescope: Celestron C9.25 SCT
Accessory: Starizona HyperStar C9.25-v4 lens
Imaging Camera: ZWO ASI 2600MC
Antlia Triband RGB Ultra, 2"
Mount: iOptron GEM45
ZWO ASIAIR Plus Control and Capture
Calibrated with Darks, Flats and Dark Flats
Processed with PixInsight, Photoshop
Photo taken in 1987. Image is a scan off of a 3-1/2” x 5” print.
There are 4 typical features of Britain’s Greeves brand motorcycles that are visible here. The leading arm front suspension, the cast alloy I-beam subframe, the Villiers 2-stroke engine and the blue livery with distinctive Greeves’ script.
I think it’s a beauty!
Total exposure was 2 hours 32 minutes at ISO 800 (61 subframes of 150 seconds were stacked). I used Canon 1000D without IR-filter and telescope-refractor Sky-Watcher ED-80 (F=510mm, D=80mm, f/6.4).
This is a detailed Moon mosaic using an infrared pass filter. The mosaic is made up of 24 individual frames, each one is a stack of the best 40% of 1,200 subframes. Taken in trying conditions with occasional rain causing me to dive for cover and protect the scope and mount before I started. By the time I had finished and closed up my home-built observatory the rain had started in earnest.
Peter
Equipment:
ZWO ASI174MM Cool mono CMOS camera, IR pass filter, 14inch f/10 LX200 SCT OTA, EQ8 mount
This is the nebulosity surounding attractive star cluster NGC 6910 in Cygnus. The image is a stack of eleven five-minute subframes in Hydrogen Alpha.
Peter
Equipment:
Atik 460EX mono CCD, 130mm triplet APO, EQ8 mount. As part of a test of accuracy in RA of my EQ8 all images were captured unguided.
Manufacturer: Chrysler Group LLC for Plymouth, Auburn Hills, Michigan - USA
Type: Fury V8 Series RP2-H27 Convertible
Production time: 1961
Production outlet: 6,948
Engine: 5208cc V-8 Fury V-800 OHV I-head
Power: 230 bhp / 4.400 rpm
Torque: 461 Nm / 2.400 rpm
Drivetrain: rear wheels
Speed: 170 km/h
Curb weight: 1804 kg
Wheelbase: 118 inch
Chassis: box frame with crossbars and unibody body with bolted-on subframe
Steering: worm & three tooth roller
Gearbox: three-speed manual / II and III synchronized / steering column shift
Clutch: 10 inch single dry plate disc
Carburettor: Carter or Stromberg dual troath
Fuel tank: 79 liter
Electric system: Autolite 12 Volts 50 Ah
Ignition system: distributor and coil
Brakes front: 11 inch hydraulic self-adjusting internal expanding drums
Brakes rear: 11 inch hydraulic self-adjusting internal expanding drums
Suspension front: independent ball joints, upper trapezoidal wishbones, upper triangular cross-link, lower simple arm with shock mounted tension strut and along lying torsion bars (Torsion-Aire System) + Oriflow hydraulic telescopic shock absorbers
Suspension rear: beam axle, coil link system, 2½ inch outboard mounted asymmetrical longitudinal leaf springs + Oriflow hydraulic telescopic shock absorbers
Rear axle: live semi-floating type
Differential: hypoid 3.58:1
Wheels: 5K - 14 inch steel discs safety rim type
Tires: 7.5 x 14 4-ply
Options: pushbutton-controlled Torque Flite three-speed automatic transmission, Power Flite two-speed automatic transmission, Sure-Grip differential, power brakes, power steering, DeLuxe steering wheel, power windows, power seats, bucket seats, fold-down armrests, Air Conditioning, pushbutton Hi-Fi radio, rear seat radio speakers, load leveling system, push-button heater / defroster, windshield washer (foot operated), variable speed windshield wipers, outside left mirror, back-up lights, Solex tinted safety glass, bumper guards, colour-matched carpeting, child-guard safety locks, inside “Day/Nigt” rear view mirror, safety-padded sun visors, parking brake warning light, safety seat belts (front and rear), rear window defogger, dual exhaust mufflers, emergency warning lights, custom curb signals,
Special:
- The Plymouth automobile was introduced on July 7, 1928. It was the Chrysler Corporation's first entry in the low-priced field, which at the time was dominated by Chevrolet and Ford.
- The logo featured a rear view of the Mayflower ship which landed at Plymouth Rock, hence the name "Plymouth" as the brand.
- The origins of the first Plymouth can be traced back to the Maxwell automobile. When Walter Chrysler took over control of the trouble-ridden Maxwell-Chalmers car company in the early 1920's, he inherited the Maxwell as part of the package. After he used the company's facilities to help create and launch the Chrysler car in 1924, he decided to create a lower-priced companion car. So for 1926 the Maxwell was reworked and re-badged as a low-end Chrysler model. Then at the end of the decade this model was once again reworked and re-badged, this time to create the Plymouth.
- The word "fury" denotes a type of anger, inspired by the Furies, mythological creatures in Ancient Greek and Ancient Roman mythology.
- From 1960 the name Fury was no longer used for the original Sports Sedans, but for the most exclusive line Plymouth's. The successors of the original type Fury were called Sport Fury since then.
- The 1961 Fury V8 Series RP2-H, with a reskin “below-the-beltline” and its pinched aluminum grille, was available as this 2-door Convertible, as 2-door Hardtop (16,141 units built), as 4-door Hardtop (8,507 units built) and as 4-door Sedan (22,619 units built).
- This second generation mid-sized Fury’s (1960-1961), designed by Virgil Exner, were assembled in Detroit, Michigan (Lynch Road) and in Windsor, Ontario (Canada).
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 00.48 and 01.11 EDT
* Altitude of centre of frame at time of exposures: ~24°, declining to 21°
* Temperature 11° C.
* Total exposure time: 11 minutes
* 1253 mm focal length telescope
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Description:
This large, pretty and bright open cluster of stars - which happens to lie in our line of sight in front of one of the bright and star-dense arms of our Milky Way galaxy - is a favourite observational target of northern hemisphere astronomers on summer evenings.
From Wikipedia:
"The Wild Duck Cluster is one of the richest and most compact of the known open clusters, containing about 2900 stars. Its age has been estimated to about 250 million years. Its name derives from the brighter stars forming a triangle which could resemble a flying flock of ducks (or, from other angles, one swimming duck)."
For a wider angle view of the region of Scutum surrounding M11, made with a 660 mm focal length telescope in August 2019, click here:
www.flickr.com/photos/97587627@N06/48471276616
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Technical information:
Nikon D810a camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount
Eleven stacked subframes; each frame:
ISO 5000; 1 minute exposure at f/8
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness, contrast, levels), slight sharpening
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 01.50 and 02.14 EDT
* Altitude of centre of frame at time of exposures: ~40°, declining to 37°
* Temperature 17° C.
* Total exposure time: 12 minutes
* 70 mm focal length lens
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Description:
On of the brightest patches in the northern section of our home galaxy, the Milky Way, lies in the constellations Aquila (the Eagle) and Scutum (the Shield). This starcloud contains many open clusters of stars, together with foreground globules of cold dark gas that are the incubators of new star formation.
One of the most prominent star clusters in this area of the sky is M11, the so-called "Wild Duck" cluster, which is a favourite observing target of amateur astronomers with modest telescopes. M11 is the small bright blob in the lower right quadrant in this image. This is a rich open cluster of stars that looks like a duck in flight. See en.wikipedia.org/wiki/Wild_Duck_Cluster for more information about M11.
For a closer in view of M11 and the surrounding area, made in June 2020 with a 660 mm focal length telescope, click here:
www.flickr.com/photos/97587627@N06/50039721548
For a version of this photo WITH LABELS, showing constellation boundaries and the many open star clusters and dark nebulae, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/52277624786
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Technical information:
Nikkor AF-S 70-200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on Sky-Watcher EQ6-R Pro mount with a Kirk Enterprises ball head
Twelve stacked subframes; each frame:
70 mm focal length
ISO 5000; 1 minute exposure at f/4.5, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast, colour balance)
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Manufacturer: Daimler-Benz AG, Stuttgart - Germany
Type: 190 SL 121-Serie W121 B II BM121.042 Roadster
Production time: May 1955 - February 1963
Production outlet: 25,881
Engine: 1897cc straight-4 Daimler-Benz M 121 B II SOHC (mounted on a detachable sub-frame)
Power: 105 bhp / 5.700 rpm
Torque: 142 Nm / 3.200 rpm
Drivetrain: rear wheels
Speed: 171 km/h
Curb weight: 1164 kg
Wheelbase: 94.5 inch
Chassis: self-supporting (frame-floor unit with welded unibody), front subframe with front suspension, engine block and steering
Steering: recirculating ball
Gearbox: four-speed manual / all synchromesh / floor shift
Clutch: single dry late disc
Carburettor: twin Solex 44 PHH 2-barrel downdraft
Fuel tank: 65 liter
Electric system: Bosch 12 Volts 56 Ah
Ignition system: distributor and coil
Brakes front: ATE-T-50 power assisted hydraulic 9.1 inch Duplex drums
Brakes rear: ATE-T-50 power assisted hydraulic 9.1 inch drums
Suspension front: independent trapezoidal double wishbones, sway bar, coil springs with rubber auxiliary springs + hydraulic telescopic shock absorbers
Suspension rear: independent single-joint swing axle with longitudinal sliding struts, coil springs with rubber auxiliary springs + hydraulic telescopic shock absorbers
Rear axle: swing axle
Differential: hypoid 3,90:1
Wheels: 5K x 13
Tires: 6.40 - 13 Sport
Options: power brakes (standard from 1956), small third-passenger transverse seat, removable hardtop roof, removable hardtop roof with storage box made of wood, high-gloss paint, safety belts in front (from 1961), cigarette lighter, leather seats, special interior with Becker Mexico radio and automatic antenna, whitewall tires, sealed beam headlights, fog lights, “English” instruments, separate cross seat in the back, bumper overriders, wheel trim rings, chrome stone guards, chrome rocker strip, jack-hole covers, eyebrow chrome on fenders, ski holders, various suitcases, two-tone colouring
Special:
- Established in 1871, Benz & Cie. was the most important of several companies founded by Karl Benz.
- Daimler Motoren Gesellschaft (DMG) was founded by Gottlieb Daimler and his partner Wilhelm Maybach in 1890. Daimler died in 1900 and Maybach left DMG in 1907.
- By then, Benz & Cie. and DMG were rivals.
- In 1924, owing to economic necessity after World War I, they entered into an "Agreement of Mutual Interest", allowing each company to manufacture and sell their products under their original brand names. After the official merger in June 28, 1926, the firm became known as Daimler-Benz.
- The SL was designed by Karl Wilfert, Friedrich Geiger and Walter Häcker and as prototype introduced at the 1954 New York Auto Show. The production model was revealed at the 1955 Geneva Auto Show.
- The “S” stands for “Sport”/ “Sports” while the “L” meant “Leichts”/ “Light”. Some say “SL” stands for “Sehr Leicht”/ “Very Light”.
- During its first years the 190 SLR was available as a sports-racing model with small perspex windscreen and spartan one-piece leather covered bucket seats and aluminum doors.
- The 190 SL was primarily intended for the US market; a lot of comfort, but little speed.
- Some owners leave the hardtop permanently on their cars, but an official Coupé was never produced.
- All SL's were assembled in Untertürkheim, Stuttgart - Germany.
- From the total of 25,881 units built, 5,245 remained in Germany, 20,636 units were exported, including 10,368 units to the United States.
IC443 is a supernova remnant about 5000 light years distant. For this false colour image I captured light emitting from hydrogen, sulphur and oxygen ions and then combined in a HSO tone map i.e. hydrogen is red, sulphur is green and oxygen is blue. Throughout much of the jellyfish hydrogen and sulphur emissions are equally strong giving yellow, while oxygen is relatively weak and is only visible around the edges.
The image is an integration of 12 hours of H, 13 of O and 14 of S captured in 10 minute subframes on a QHY163M camera with Optolong filters, The telescope was a WO FLT110 with Flat4 and this was mounted on a Skywatcher AZ-EQ6. Imaging was managed by Sequence Generator Pro with PHD2 for guiding and all post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand
Moon: Southwestern Quadrant Mosaic
May 8, 2017
This was an experiment to determine a way to create image files large enough for making large, high quality prints. It was also my first use of AutoStakkert!2 (which I LIKE!).
Mosaic of seven subframes, each frame a stack of the best 1666 of 2222 video frames.
Raw video processed in PIPP and converted to .ser files, stacked in AutoStakkert!2, wavelets applied in Registax 6.
Subframes merged with Microsoft ICE. Final processing in Photoshop CC2017.
ASI ZWO290MM Camera
Optolong IR Pass (685nm) Filter - 1.25"
Explore Scientific 3x Barlow lens
Explore Scientific ED80 APO Triplet f/6 Refractor, 480mm focal length
Celestron Advanced VX EQ Mount
Comet C252/P, captured today (2016-04-30) between 0:45h and 2:45h UT in Tenerife, 1180 m altitude. After stacking the subframes I was very surprised by these faint HII regions (unknown to me; perhaps someone can give me some information) at top of the coma and also under the near coma part of the tail (giving false red color to it).
Coma diameter is 37 ' and tail length about 1 degree.
Parallel exposure resulting in a LRGB image.
RGB: 120 x 45 sec, Sony A7s (CentralDS modded), Hyperstar 14"/F1.9, ISO3200, IR block filter
Monochrome: 40 x 180 sec, Starlight Xpress SX-36, RASA 11"/F2.2, L-pro filter
Both mounted at a ASA DDM 85 (unguided)
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 02.09 and 02.34 EDT
(285 km by road north of Toronto)
* Temperature 7° C.
* Total exposure time: 12 minutes
* 540 mm focal length telescope
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Description:
Visually with the unaided eye, or in binoculars or a telescope, the distinctively-shaped North America Nebula appears as a large but faint white cloud in the middle of our Milky Way galaxy. The digital camera sensor, however, reveals the red glow of ionized hydrogen gas.
This nebula is 1,600 light years distant from our solar system. Clouds of dark gas lie between us and the nebula, blocking the light behind and creating the apparent shape of the nebula.
For a wider angle view of this nebula - photographed with a telephoto lens 9 nights earlier - that also shows the adjacent Pelican Nebula - click here:
www.flickr.com/photos/97587627@N06/29220929561
... and for an even wider angle view of the constellation Cygnus (The Swan), including the North America Nebula and other hydrogen gas clouds, click here:
www.flickr.com/photos/97587627@N06/27422508523
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Technical information:
Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Twelve stacked frames; each frame:
540 mm focal length
ISO 6400; 1 minute exposure at f/5.4; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance, sharpening)
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This is an open cluster in Orion that, when rotated and flipped, resembles the number 37 written in the stars.
Subframes were shot on 2022-01-20 and 01-21. Taken with Optolong RGB filters and an Atik 414-EX mono camera on a Celestron Edge HD 925 with an 0.63x focal reducer. This gives a focal length of 1525 mm.
R channel: 70 frames of 30 s exposures
G channel: 77 frames of 30 s exposures
B channel: 51 frames of 30 s exposures
After preprocessing and compositing the stacks in PixInsight, color was calibrated using the Photometric Color Calibration tool. I played with the saturation a bit and knocked down the background in Photoshop.
This is a colour image of this fascinating region around Orion's belt captured through an 80mm triplet APO refractor using a colour Atik Horizon CMOS camera with a Baader-S filter. I had to wait for both the sky to clear and fireworks displays around me to stop before I could take this image. The image consists of eleven seven-minute subframes stacked. Dark frames have been subtracted but no flats or bias frames used.
Peter
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Photographed at Algonquin Provincial Park, Ontario, Canada
between 02.24 and 02.44 EDT
(285 km by road north of Toronto)
* Altitude of centre of frame at time of exposures: ~12°
* Temperature 14° C.
* Total exposure time: 10 minutes
* 660 mm focal length telescope
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Description:
North is to the upper right in this image, which contains several objects of note.
M8, the Lagoon Nebula, with embedded star cluster NGC 6530 (right side of the frame)
One of the most prominent, large, bright and well known nebulae in the sky is the Lagoon Nebula (M8), which is a favourite target of amateur astronomers with modest telescopes.
From Wikipedia: "The Lagoon Nebula ... is a giant interstellar cloud ... classified as an emission nebula and as an H II region. [It] was discovered by Giovanni Hodierna before 1654 and is one of only two star-forming nebulae faintly visible to the eye from mid-northern latitudes. Seen with binoculars, it appears as a distinct oval cloudlike patch with a definite core. Within the nebula is the open cluster NGC 6530.
The Lagoon Nebula is estimated to be between 4,000-6,000 light-years away from the Earth. In the sky of Earth, it spans 90' by 40', which translates to an actual dimension of 110 by 50 light years. ... The nebula contains a number of Bok globules (dark, collapsing clouds of protostellar material), the most prominent of which have been catalogued by E. E. Barnard as B88, B89 and B296."
IC 4678 (directly above M8)
This is a tiny nebula composed of emission (pink) and reflection (blue) components.
NGC 6544 (near centre of frame)
This is a small globular star cluster of magnitude ~7.3, lying at a distance of 9,000-10,00 light years from us..
NGC 6553 (left edge of frame, just below centre)
This is a globular star cluster of magnitude ~8.@, with an unusually low star concentration even at its centre, and lying about 19,600 LY from our solar system. Studies show that it underwent two distinct periods of star formation, resulting in two populations of stars with differing compositions, especially in sodium and aluminum.
For a version of this photo WITH LABELS, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/52229322166
To see a wider angle view this and other adjacent nebulae, photographed in Australia in Sept. 2019, click here:
www.flickr.com/photos/97587627@N06/49183970671
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Technical information:
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic telescope, mounted on Astrophysics 1100GTO equatorial mount
Ten stacked frames; each frame:
660 mm focal length
ISO 2500; 1 minute exposure at f/5.2; unguided
With long exposure noise reduction
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness / contrast, colour balance)
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Conet C/2020 F3 (NEOWISE) velow the Big Dipper, or in the claws of the Great Bear.
Stack of four subframes, each a 30 second exposure taken with a Canon EOS 550D at ISO 1600, 13mm, f/4.0, Cokin P820 diffusor, tracked with the Vixen Polarie star tracker.
The spread wings of the Crested Caracara provide a subframe for the second Caracara at the top of a cell tower they have frequented over the past week or so. Before they move on, I will take as many pictures as possible. By the way, I’m not really sure if this counts as “subframing.”
In order to advance beyond a somewhat colorless result arising from using a combination of an OSC camera and a broad band LPF, the integrated image was first separated into starless and stars only components, followed by splitting the starless image into its RGB components which were individually weighted and then recombined using LRGB Combination followed by further processing.
Scope: WO Zenith Star 81mm f/6.9 with WO 6AIII Flattener/Focal Reducer x0.8
OSC Camera: ZWO ASI 2600 MC Pro at 100 Gain and 50 Offset
Mount: iOptron GEM28-EC
Guider: ZWO Off-Axis Guider
Guide Camera: ZWO ASI 174mm mini
Light Pollution Filter: Chroma LoGlow Broadband LPF
Date: 30-31 March 2023 and 2-5 April 2023
Location: Washington D.C.
Exposure: 244x300s subs (= 20.3 hours)
Software: Pixinsight
Processing Steps:
Preprocessing: FITS data > Image Calibration > Cosmetic Correction > Subframe Selector > Debayer > Select Reference Star and Star Align > Image Integration.
Linear Postprocessing: Integrated image > Rotation > Dynamic Crop > Dynamic Background Extractor (subtraction to remove light pollution gradients and division for flat field corrections) > Background Neutralization > Color Calibration > Blur Xterminator > Noise Xterminator.
Nonlinear Postprocessing: Linear postprocessed image > Histogram Transformation > Star Xterminator to separate into Starless and Stars Only images.
Starless image > Histogram Transformation > Noise Xterminator > Local Histogram Equalization > Split RGB Channels > Weight the original channels and use Pixel Math to generate new modified RGB channels.
Apply HDR Multiscale Transform to the L channel (= R channel for broad band image) and the new modified RGB channels.
LRGB combination > LRGB image.
LRGB image > Curves Transformation using color masks > Histogram Transformation (multiple steps as needed) > Local Histogram Equalization (multiple steps as needed) > Final Starless image.
Pixel Math to combine the Final Starless Image and the new Stars Only image > Rejoined image.
Rejoined image > Dark Structure Enhancement > New rejoined image.
New rejoined image > Topaz AI > AI image.
Pixel Math to combine New rejoined image and AI image > Final result.
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"Easily identified by the spectacular band of dark dust that partially obscures its bright core, Messier 64, or the Black Eye Galaxy, is characterized by its bizarre internal motion. The gas in the outer regions of this spiral galaxy is rotating in the opposite direction from the gas and stars in its inner regions. This strange behavior may be the result of a merger between M64 and a satellite galaxy over a billion years ago." science.nasa.gov/mission/hubble/science/explore-the-night...
The Borgward B 611 is a light commercial vehicle built by Borgward at their Bremen factory between 1957 and 1961. Only 14.748 units were made.
The vehicle was offered as a light van, a minibus (with rear seats and more windows) or as a platform wagon (Pritschenwagen), although several other body styles were available either directly from the manufacturer or from specialist body manufacturers.
The van was launched in 1957 with the name Borgward B 1500 F. The suffix "F" stood for "Frontlenker-Transporter", and referred to a design feature that was a first for Borgward, where the driver was positioned right at the front of the vehicle instead of behind a hood with an engine underneath. The engine was installed in a large pod between the driver and his passenger. Where three seats were used in the driver's compartment, the middle passenger sat on top of the engine cabin. According to most sources, it was not until 1959 that the vehicle was given the name by which it is more remembered today, Borgward B 611. Buyers of the B 611 could choose between a 1493 cc petrol engine delivering up to 60 hp (45 kW) and a 1758 cc diesel engine with a maximum power of only 42 hp (31 kW). The petrol unit was shared with the Borgward Isabella which had been introduced a few years earlier. However, the gear ratios were not. The B 611 came with a four-speed fully synchronized manual gear change, operated by a column-mounted lever. Claimed top speed was 92 km/h (58 mph) for a petrol powered van and a more leisurely 75 km/h (47 mph) for buyers selecting the diesel engine.
The B 611 stood on a steel chassis with ladder frame and transverse reinforcement bars. At the front, independent suspension used side-mounted wishbones with coil springs. A rigid swing axle was suspended at the rear with longitudinally mounted leaf springs. The engine, clutch, transmission, radiator and front suspension were all supported by an additional subframe. With a wide comfortable cabin that seats three people and uses uncomplicated technology, the Borgward B 611 won friends in the press and on the market. By the time of Borgward's controversial bankruptcy in 1961, the manufacturer had produced 14.748 of them. (www.metropoleclassiccars.com/)
Entrepreneur Frans van Haren has a classic car collection that has won prizes at prestigious national and international competitions. Since 2017, he has been presenting his impressive car collection to a wider audience in the futuristic-looking, former furniture showroom 'Metropole' in Druten, the Netherlands. The collection includes some four hundred cars, trucks and motorcycles, making it almost the largest car museum in the Netherlands.
40 Years of Peugeot 309 | Visit to Car Museum Metropole
Druten, the Netherlands.
A mystery hides within 20 of the subframes within this image. I will reveal the oddities as I organize a good way to present them. I'm not saying they are unidentified aerial phenomena or aliens, but they do indicate a mystery object not recorded in satellite catalogues.
Dwarf III. 286 45-second subframes. Polar alignment.
Breakdown of follow up images:
www.flickr.com/photos/glenbledsoe/54829978059/in/photostr...
www.flickr.com/photos/glenbledsoe/54829738721/in/photostr...
www.flickr.com/photos/glenbledsoe/54830006013/in/photostr...
Quick stack of 12 subframes , 30 sec each and processing in PI .
Taken on Oct 27 ,2025 from my backyard in Tiny Twp. Canada
Taken in Hydrogen Alpha just before 4pm as the sky was beginning to darken.
This is a stack of 29 subframes taken through my 130mm refractor using an Atik 460 EX mono camera and 0.75 reducer.
Peter
In the news today, AR2941 launched a CME that knocked out 40 Starlink satellites.
Canon EOS 60Da (1/640s, ISO 100)
TeleVue NP101is/2x Power Mate (4", f/10.4)
Losmandy G11
100 subframes captured with Backyard EOS (BYE). CR2 files converted to AVI by PPIP. Best 75% of frames stacked in AutoStakkert! Sharpened in Registax and finished in Photoshop.
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 12° C.
* Total exposure time: 8 minutes
* 1200 mm focal length telescope
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Description:
From Wikipedia:
"The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1,360 light years.
This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At its brightness of visual magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes."
What we are seeing is the visible remains of a low-mass star's expelled gaseous outer-envelope, leaving an X-ray hot white dwarf at the centre.
Stars to about 17th magnitude are visible in this image. The central star in the nebula is magnitude 14.0.
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Technical information:
Nikon D810a camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Eight stacked subframes; each subframe:
1200 mm focal length
ISO 4000; 1 minute exposure at f/8; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (levels, brightness, contrast, sharpening)
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A widefield shot of the ρ Ophiuchi - Antares region showing red emission nebulae, blue and yellow reflection nebulae and dark clouds and tendrils of gas and dust. At the right, above the bright star Antares, is globula cluster M4 which is the nearest to us.
This image is an integration of 105 x 2 minute subframes taken with a QHY268C OSC camera and a WO Redcat51, Image sequencing was managed via SGP and PHD2, all post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand
Narrowband (Ha Sii Oiii) combination using SHO palette. Processed in Pixinsight and Photoshop, and enhanced in Lightroom.
The weather has still remained bad, so I have been limited in what I can capture (it doesn't help that it's low in the sky and goes behind houses by midnight). I processed what I managed to capture this week.
Doing 5 min exposures, 100 gain. 12xOiii, 6xHa, and only a couple Sii. Given the results from that amount of subframes, I'm looking forward to what I can do when the weather improves.
Equipment: Skywatcher Esprit 100ED, HEQ5-Pro mount, ASI 2600MM Camera, and I had to temporarily switch to .67x flattener because my SkyWatcher one has issues.