View allAll Photos Tagged Subframing
This is a stack of 8 150 s exposures taken around 2021-06-11 05:15 UT. The Leo Triplet consists of M65 (lower right), M66 (lower left) and NGC 3628 (top). These galaxies appear in Leo, about 8° north of the ecliptic. Since the inclination of Vesta's orbit is a bit over 7° to the ecliptic and its orbit is larger than Earth's, it can be photographed with the three galaxies.
Subframes taken with an Atik 314L+ color CCD on a HyperStar on a Celestron Edge HD 925. Preprocessing in Nebulosity; processing in PixInsight with final touches in Photoshop.
Vesta is the bright object in the lower right corner.
#Subframing #FlickrFriday
I'd set out to use this WW2 coastal look-out bunker somehow for Flickr Friday anyway, but this as-found can was a gift from the photography Gods :-)
also known as NGC 4736, Crocodile Eye Galaxy, or Croc's Eye Galaxy.
Dwarf 3
80 45-second subframes (one hour total exposure)
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Photographed 25 km east of Alice Springs, Northern Territory, Australia, long. 134.04° E., lat. 23.76° S., between 23.24 and 23.46 CAST (Central Australian Standard Time)
* Altitude of centre of frame at time of exposures: 40-43°
* Temperature 12° C.
* Total exposure time: 10 minutes
* 105 mm focal length lens
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Description:
The star pattern in the constellation Scorpius (The Scorpion) is one of the most recognizable in the sky. The lower part of this pattern - the tail of the scorpion - lies very low in the sky as seen from the northern hemisphere. From southern latitudes, however, this part of the sky is directly overhead during nighttime hours in the months of April-July.
Our home galaxy, the Milky Way, passes through Scorpius, as can be seen in this view. Numerous pink hydrogen gas clouds and many star clusters are concentrated in this part of the sky as well.
This is the telescope and mount that I used for my astrophotography on this trip:
www.flickr.com/photos/97587627@N06/28602350028
For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/40663302100
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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 HEQ5 equatorial mount with Kirk Enterprises ball head
Seven stacked subframes; each frame:
ISO 3200; 1 minute exposure at f/4.5, 105 mm focal length, unguided (with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast)
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Over the past weekend, Rochester experienced something rare - four clear nights in a row! While it is true that the moon did not make for the best time for astro imaging, I had to take advantage of the rare clears skies and so I had both of my imaging platforms out catching photons every night!
The first image I am ready to share from this series is M81 and M82. I have been wanting to image these two beautiful galaxies for a while now and I finally got my chance!
Messier 81, also known as NGC 3031 and Bode's Galaxy, is a beautiful spiral galaxy located 12 Million light years away in the constellation Ursa Major. It was first discovered by Johann Elert Bode on 31 December 1774, thus the common name of Bode's Galaxy. M81 is the largest galaxy in a group of 34 galaxies, known appropriately enough as the M81 Group.
Messier 82, also known as the NGC 3034 and as the Cigar Galaxy, and is also located 12 million light years away and is part of the M81 group of galaxies. M82 is an extremely luminous galaxy - being five time brighter than our own Milky Way, and has a core that is 100 time brighter! This is due to intense star formation caused by gravitational perturbations from interactions with M81. M82 is known for its complex network of dusty filaments that extend to the side of the galaxy.
This particular image is the result of 191 subframes with an exposure of 180 seconds, for a total integration time of just over 9.5 hours. These frames were taken over three nights.
I would really like to image this again using narrowband and see if I can get a better mage of the tendrils from M82! - A fun future project…..
Details for this image:
191 x 180 seconds, bin 1x1, unity gain @ -15C. (Total integration of 9.55 hours).
50 Bias exposures
34 Dark exposures
45 Flat Darks
30 Flats taken each night, each nights data was calibrated to these flats.
Scope: William Optics 132mm FLT F/7 APO
Guide Scope: Sharpstar 61DPHII
Guide Scope Focus Motor: ZWO EAF
Camera: ZWO ASI294MC-Pro
Guide Camera: ZWO ASI290Mini
Main Scope Focus Motor: Pegasus Astro Focus Cube 2
Field Rotator: Pegasus Astro Falcon
Mount: Ioptron CEM60
Polar Alignment: Ioptron Ipolar integrated alignment cameras
Capture Software: PHD2 Guider, Sequence Generator Pro controller
Image Processing: Deepsky Stacker, Pixinsight, Photoshop, Coffee, extensive processing indecision and second guessing, and much swearing…..
Thanks for looking!
Pat
I check my subframes before I do any post-processing. You never know what you might find, right?
Last night I captured the trails of a number of satellites. They are easy to explain (thank you, Elon, for ruining so many astrophotographs) But the three parallel bright lines are a complete mystery. Three somethings were moving slowly near M106 (faintly visible in the center), but not as slowly as the satellites. I also think there are vapor trails.
I can't figure out what they are.
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 21.22 and 21.40 EDT
* Altitude of the cluster at time of exposures: 29.5°
* Temperature 13° C.
* Total exposure time: 16 minutes
* 1200 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 Scutum and M11, made with a 740 mm focal length telescope in September 2016, click here:
www.flickr.com/photos/97587627@N06/30487082573
For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/30507824983
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Nikon D810a camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount
Sixteen stacked subframes; each frame:
ISO 6400; 1 minute exposure at f/8
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness, contrast, levels, colour balance)
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 01.03 and 01.24 EDT
* Altitude of centre of frame at time of exposures: ~37°
* Temperature 16° C.
* Total exposure time: 10 minutes
* 105 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 constellation Aquila (the Eagle), Scutum (the Shield), and Serpens Cauda (the Serpent's Tail). 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 almost dead centre 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 on the same night 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 dozens of open and globular star clusters, and dark nebulae, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/50061525587
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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 Astrophysics 1100GTO mount with a Kirk Enterprises ball head
Ten stacked subframes; each frame:
105 mm focal length
ISO 4000; 1 minute exposure at f/5, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast, colour balance, M11 masking)
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 03.47 and 03.59 EDT
(285 km by road north of Toronto)
* Temperature 10° C.
* Total exposure time: 6 minutes
* 90 mm lens
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Description:
The familiar "W" shape of the constellation Cassiopeia rises in the north-eastern sky after midnight in mid-summer in the northern hemisphere. The Milky Way galaxy runs through this part of the sky. Many open clusters of stars, loosely bound together gravitationally, also populate this area of the sky.
Many dark tendrils of foreground gas obscure the light of the stars beyond in this view.
For a version of this image withOUT labels, click on the LEFT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/36158810952
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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 Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Six stacked frames; each frame:
90 mm focal length
ISO 3200; 1 minute exposure at f/4.5; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance)
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 23.29 and 00.01 EDT
* Altitude of the nebula at time of exposures: 63°, increasing to 67°
* Temperature 15° C.
* Total exposure time: 15 minutes
* 660 mm focal length telescope
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This is a large ionized emission nebula and star forming region more than 100 light-years in diameter, located about 2,400 light-years away in the constellation Cepheus. The gas cloud is energized by the bright multiple star HD206267, which is just a little right of centre in this image, as well as by the entire cluster (Tr37) of young, bright, bluish hot stars that is in the centre of the cloud.
Per Wikipedia: The HD206267 "system is emitting a stellar wind that reaches an exceptional velocity of 3,225 km/s, among the highest measured for stars of this type".
The very small Elephant’s Trunk Nebula (IC 1396A) is the elongated globule to the right of centre. Up to 250 stars are in the process of being created in this nebula. One 2012 study of this region argues that "the TSF [triggered star formation] mechanism in IC 1396A is a radiation-driven implosion process persisting over several million years".
For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/49230602858
For a view of this same region made with a 540 mm focal length telescope two years earlier, click here:
www.flickr.com/photos/97587627@N06/36698969403
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Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount
Fifteen stacked subframes; each frame:
ISO 8000; 1 minute exposure at f/5.2, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness / contrast, levels, colour balance)
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My only other image of this galaxy was from when a supernova was visible.
Now? No supernova.The RGB data was taken in October 2020 with Hα data added in January 2021. This image is a bit of a mess, but it was what I could do with about 3 hours of data from my very light polluted yard.
All subframes taken with a Celestron Edge HD 925 at f/2.3 with Hyperstar. RGB data was taken with an Atik 314L+ CCD camera with a light pollution filter; Hα data was taken with an Atik 414-EX with an Atik hydrogen-alpha filter. Preprocessing in Nebulosity; channel combination and subsequent processing in Pixinsight; final touches in Photoshop.
I was struggling to somehow show the blue colored Squid nebula blanketed inside the red colored Flying Bat nebula
Celestron C8 with Starizona Hyperstar at F/1.9 using Optolong L-eXtreme F2 dual band filter, ZWO ASI294MC Pro camera
6 hours 24 minutes total integration time
192 x 2 minute subframes
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 21.57 and 22.21 EDT
(285 km by road north of Toronto)
* Altitude of centre of frame at time of exposures: ~56°
* Temperature 5 C.
* Total exposure time: 12 minutes
* 660 mm focal length telescope
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Description:
There are actually three deep-sky objects in this image: (i) the pinkish Cocoon Nebula (IC5146), (ii) the associated open star cluster Cr 470, which appears embedded in the cocoon Nebula, and (iii) stretching out to the right (west in the sky) the dark nebula B (Barnard) 168. The first two objects are located about 4,000 light years from our solar system.
The Cocoon Nebula is a star nursery, and the associated stars within Cr 470 are young, hot, blue stars ~100,000 years of age.
For a version of this photo WITH LABELS, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/51639702940
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Technical information:
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount
Twelve stacked frames; each frame:
660 mm focal length
ISO 8000; 1 minute exposure at f/5.2; unguided
With long exposure noise reduction
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, colour balance, bright star bloating reduction)
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The bright blue reflection nebulae of M78 glowing amidst intertwining lanes of dust and gas, with a section of the bright red emission nebula Barnard's Loop in the lower left of frame.
This image is an integration of 20 hours total exposure (241 x 300s subframes) shot on a QHY168C OSC with a WO Zenithstar 103 telescope. An STC astro-multispectra filter was used. Imaging was managed via Sequence Generator Pro and guiding controlled via PHD2. All post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand.
Comet C2016 R2 from this morning. At first, the situation was quite frustrating. The clouds that ran through again and again left only small gaps in order to design and focus the image at all. Eventually the whole sky closed up (I used these shots as flats; -). I just kept the recordings running. And eventually, when I was sleeping, the sky finally opened up. Only the rechargeable battery of the Sony A7s had "given up"until then, so that only 6 subframes were possible in a good sky. What a joy this morning that some subframes were usable between 1:30 and 3:30h.
Technology:
(1) Hyperstar C14, Starlight Xpress H36 mono, 60 x 90 sec (bin 2x2)
(2) RASA C11, Sony A7s, ISO 3200,6 x 90 sec
ASA DDM85 mount
Tenerife, 1180 m a. s. l. 2018-01-15 1:30h - 3:30h UT
1999 Alfa Romeo 156 1.8 T. Spark.
Scrapped (last MoT test expired in September 2015).
It failed a test that month -
Nearside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Supplementary restraint system warning lamp indicates a fault (5.4.2)
A shock find on streetview. While prepping for a spotting trip, I thought I'd have a look in a random newbuild estate, just because the streetview had been done pretty recently. To my surprise, this pre-facelift Ulysse was sitting, so I went to go and see it the next day.
Long term ownership and off the road since last year, after failing it's MOT on the dreaded Front Subframe. I'd say it's the end of the road for this rare MPV, but kudos to the owners for keeping it about.
P797 FJA
Mu Cephei, officially named the Garnet Star, is a red supergiant star in the constellation Cepheus. It appears garnet red and is located at the edge of the IC 1396 (Elephant's trunk) nebula. Mu Cephei is more than 100,000 times brighter than the Sun. It is also one of the largest known stars with a radius around or over 1,000 times that of the sun, and were it placed in the Sun's position it would engulf the orbit of Mars and Jupiter. (Wikipedia)
NB: Superman would have no powers there.
Seestar S50
832 ten second subframes
IC 443, commonly known as the Jellyfish Nebula, is a supernova remnant located in the constellation Gemini about 5,000 light-years from Earth. It gets its name due to its peculiar shape, resembling a jellyfish floating in space. IC 443 is the result of a massive star explosion that occurred thousands of years ago leaving behind a cloud of gas and dust that spans approximately 70 light-years across. The bright star on the left is Eta Geminorum aka Propus and is part of a triple star system.
AQUISITION:
Telescope: SkyWatcher Esprit 120
Camera: QHY268MM
Filters: Astronomik Deep Sky LRGB Ha/OIII
SUBFRAMES:
Red: 35 x 300"
Green: 40 x 300"
Blue: 40 x 300"
Ha: 40 X 300"
OIII: 26 x 300"
Total exposure time: 15.1hrs
Taken between January & February 2023 by Hector Jimenez
A B2 variable star lies at the heart of this dusty region of our galaxy. The star is not hot enough to produce the UV light needed to ionize hydrogen and give this nebula a reddish/pinkish glow. Instead, shorter wavelengths get strongly scattered by the dust, giving it the classic blue hues of a reflection nebula. The Iris Nebula lies in the constellation Cepheus, which is most easily seen in summer and early autumn from the Northern Hemisphere. It doesn't reveal much when observed visually through a telescope, but it sure does photograph well.
Stack of 46 exposures of various lengths (mostly 4 minutes, but some 6 minute and 2 minute subframes as well) shot with an Atik 314L+ color camera on an Edge HD 9.25" at f/2.3 with Hyperstar. Preprocessing in Nebulosity, stacking and processing in PixInsight, final touches in PS CS 5.1.
Image center (J2000) is at
RA 21h 1m 17s
DEC +68° 10' 58"
Manufacturer: Lancia Automobiles S.p.A., Turin - Italy
Type: Fulvia Berlina 1C 1a Serie Tipo 818.000/001
Production time: mid-year 1963 - mid-year 1964
Production time: 1963 - 1967 (1C Series)
Production outlet: 32,200
Engine: 1091cc Lancia 818.000 V-4 (12°53'28") DOHC, chain driven
Power: 58 bhp / 5.800 rpm
Torque: 82.5 Nm / 4.000 rpm
Drivetrain: front wheels (homokinetic Rzeppa joints)
Speed: 138 km/h
Curb weight: 1040 kg
Wheelbase: 97.6 inch
Chassis: front auxiliary frame and subframe with all-steel unibody
Steering: worm & roller
Gearbox: four-speed manual / all synchromesh / steering column shift
Clutch: single dry plate disc
Carburettor: single Solex C32 PAIA 8 downdraft twin choke
Fuel tank: 38 liter
Electric system: Marelli 12 Volts 42 Ah
Ignition system: distributor and coil
Brakes front: Dunlop dual-circle 10 inch hydraulic discs
Brakes rear: Dunlop dual-circle 10.5 inch hydraulic discs
Suspension front: independent wishbones, trapezoidal triangle cross-bars, sway bar, single cross-leaf springs + hydraulic telescopic shock absorbers
Suspension rear: beam axle, Panhard rod, semi-elliptic leaf springs + hydraulic telescopic shock absorbers
Rear axle: live
Differential: hypoid 4.778:1
Wheels: 14 inch steel discs
Tires: 155 - 14 Michelin ZX or Pirelli Cinturato
Options: sun roof, radio
Special:
- Lancia is an Italian automobile manufacturer founded in 1906 by Vincenzo Lancia and which became part of the Fiat Group in 1969. The company has a long history of producing distinctive cars, many technical improvements and also has a strong rally heritage. Lancia quickly earned a reputation for being one of the most innovative carmakers in the world.
- The Lancia Fulvia Series (named after Via Fulvia, the Roman road leading from Tortona to Torino and according to other sources named after Fulvia Flacca Bambula, an aristocratic Roman woman and wife of Mark Antony) was designed in-house (Centro Stile Lancia) at Lancia in Milan - Italy. The technical concept is by Antonio Fessia, the model was designed by Pietro Castagnero. The V-4 engine was designed by Zaccone Mina and mounted forward at a 45-degree angle.
- It was introduced at the 1963 Geneva Motor Show.
- Parallel to the 1C Series ran 2C 1a Series (1964-1967: 48,266 units built) with the same engine but with twin Solex C32 PHH + Solex C32 PHH1 carburettors, 71bhp/6.000 rpm, 92Nm/4.300rpm and a top speed of 145km/h.
- In 1969, Fiat took over production of Lancia, so the Fulvia Berlina Series (1963-1972: 188,637 units built, while other sources say 192,097 units built) was arguably the last true Lancia, all assembled at the new Lancia plant in Chivasso - Italy.
Shot from Mt. Pinos, CA on the morning of 2016-07-08. The Cocoon Nebula is an emission nebula in Cygnus. There is a long tail of dark nebulae extending away from it to the west (to the right in this image).
This image is a mosaic of three separate regions. Each panel of the mosaic is a stack of 150s subframes taken with an Edge HD 9.25" at f/2.3 with Hyperstar, and an Atik 314L+ color CCD. Preprocessing done in Nebulosity; stacking, compositing, and processing in PixInsight; some final touches in PS CS 5.1.
Manufacturer: Zagato Milano s.r.l., Rho, Italy / for Lancia Automobiles S.p.A., Turin - Italy
Type: Fulvia Sport 1.3 S Tipo 818.650/651 Series IIa
Production time: 1970 - 1973
Production outlet: 2,600 (incl. 600 Series II with Series I bodyshell)
Engine: 1298cc Lancia Tipo 818.303 SOHC V-4 13°
Power: 90 bhp / 6.000 rpm
Torque: 114 Nm / 5.000 rpm
Drivetrain: front wheels
Speed: 170 km/h
Curb weight: 944 kg
Wheelbase: 91.7 inch
Chassis: with front subframe and self-supporting steel unibody
Steering: worm & roller
Gearbox: five-speed manual / all synchromesh / floor shift
Clutch: Birfield homokinetic double joints dry disc
Carburettor: twin horizontal Solex C 35 PHH 19 2-barrel / twin Solex C35 PHH-E2 2-barrel
Fuel tank: 38 liter
Electric system: 12 Volts
Ignition system: electronic
Brakes front: hydraulic Girling calipers discs with Brake Power Regulator
Brakes rear: hydraulic Girling calipers discs with Brake Power Regulator
Suspension front: independent trapezoidal wishbones (A-arm, control arm), sway bar, transverse leaf springs + De-Carbon telescopic shock absorbers
Suspension rear: Panhard rod, sway bar, semi-ellipt leaf springs + De-Carbon telescopic shock absorbers
Rear axle: live
Differential: hypoid
Wheels: 4½ x 14
Tires: 165/65-R14
Options: 13-inch Cromodora wheels, a racing fuel filler
Special:
- The Lancia Fulvia Series (named after Fulvia Flacca Bambula, an aristocratic Roman woman and wife of Mark Antony) was designed in-house at Lancia in Milan - Italy. The technical concept is by Antonio Fessia, the model was designed by Pietro Castagnero.
- The narrow-angle (13 degrees) V-4 engine was designed by Zaccone Mina and has only a single cylinder head.
- From 1970 until 1973 there was this Fastback Coupé called Sport 1.3 S Series II, designed by Ercole Spada and assembled at Zagato Milano s.r.l., Rho, Italy. The first 600 units of Series II were still fitted with Series I bodyshells (1967-1970: 1,602 units built) with a separate spare wheel-hatch and smaller rear lights and aluminium bonnet and doors.
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 21.31 and 21.50 EDT
(285 km by road north of Toronto)
* Altitude of these objects at times when subframes were made: 18°-20°
* Temperature 12° C.
* Total exposure time: 9 minutes
* 540 mm focal length telescope
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Description:
These are without a doubt two of the most popular targets for amateur astronomers with modest telescopes. Unfortunately for northern hemisphere observers, they are located far south in the constellation Sagittarius, so they are very low in the sky, especially for us in Canada.
M20, the Trifid Nebula (left of centre) is a combination blue reflection nebula and red emission nebula. For more information, click here:
en.wikipedia.org/wiki/Trifid_Nebula
The much larger M8, the Lagoon Nebula, is a huge interstellar cloud that is faintly visible to the unaided eye, but only long exposures with the camera can reveal the characteristic red glow of ionized hydrogen gas. For more information, click here:
en.wikipedia.org/wiki/Lagoon_Nebula
For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/29207804310
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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
Nine stacked frames; each frame:
540 mm focal length
ISO 3200; 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, sharpening)
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 02.10 and 02.22 EDT
(285 km by road north of Toronto)
* Altitude of centre of Cygnus at time of exposures: ~67°
* Temperature 3° C.
* Total exposure time: 5 minutes
* 50 mm focal length lens
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Description:
Our home galaxy, the Milky Way, runs through the constellation Cygnus (the Swan) in the northern hemisphere summer sky. Dense clouds of stars are obscured in places by winding lanes of dark foreground gas.
For a version of this photo WITH LABELS, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/50011965646
One of the largest and most obvious red hydrogen gas clouds is the aptly named "North America Nebula", two-thirds of the way from the centre of the frame to the left edge. For a close-up view of this nebula made with a 400 mm lens in August 2015, click here:
www.flickr.com/photos/97587627@N06/19933485213
Between the North America Nebula and the centre of the frame is a region of red hydrogen gas globules surrounding the bright star Sadr. for a close-in view of this area, made in August 2017 with a 200 mm focal length lens, click here:
www.flickr.com/photos/97587627@N06/35924527470
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Technical information:
Sigma 50 mm f/1.4 DG HSM ART lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Five stacked frames; each frame:
50 mm focal length
ISO 4000; 1 minute exposure at f/4.5; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance)
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1983 Austin Metro 3-door.
Supplied by whoever the Austin Rover dealer was in Holt (name of garage unreadable on this photo!).
Last MoT test expired in December 2018 and last SORN declaration expired in January 2023 (now MoT exempt).
It failed a test in October 2020 -
Nearside front integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced floor by jacking point (6.1.1 (c) (i)) - Major
Nearside front subframe mounting prescribed area excessively corroded significantly reducing structural strength front cross member (5.3.6 (a) (i)) - Major
Offside front integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced floor by jacking point (6.1.1 (c) (i)) - Major
Offside front subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside rear integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced outer sill (6.1.1 (c) (i)) - Major
Rear fog lamp not working (4.5.1 (a) (ii)) - Major
Rear sub-frame corroded and seriously weakened axle beam welded repairs (5.3.3 (b) (i)) - Major
Windscreen washer provides insufficient washer liquid (3.5 (a)) - Major
Anglia Car Auctions, King's Lynn -
"Chassis number: SAXXBANB1BD832552. This 998cc Austin Metro MkI has been off-road for a few years, with its last MoT expiring in December 2018, and a subsequent test in October 2020 producing a fail. The current mileage indicated by the odometer is 64,965 miles and the vehicle was registered in May 1983. The vehicle becomes tax and MoT exempt from April 1, 2024 although work will be required to return the Metro to a roadworthy state; however, it does start and drive well, according to the vendor, who believes the mileage to be correct as he has owned the car for nine years. A new battery has been fitted, while new tyres were fitted four years ago. Three keepers overall are recorded on the V5C.
"Documentation with the Metro includes the V5C, a photo of the car at Sandringham during Drive It Day 2016, various old tax discs and a brochure. There's also a Heritage Certificate, while the MoT certificates date from 2012, 2013, 2014, 2015, 2016 and 2017."
No reserve. Sold for £660 including premium.
This huge galaxy--200,000 light years across--that's twice the size of the Milky Way, is approximately 130 million light years away in the direction of the constellation Aries. It is referred to by some authors as “The Nautilus Galaxy.” Its unusual shape is caused by gravitational distortion due by the much smaller NGC 770 galaxy immediately above and to the right. There are an astounding number of other galaxies in this image as well. It is probably the most distant object I've ever tried to image.
Captured at the General Nathan Twinning Observatory in Belen, New Mexico on October 25th and 29th using a C11 HD with f/7 focal reducer, an ASI1600mm camera, ASI L, 7 nm R, G and B filters and a Losmandy G11 mount. 24 x 300” luminance subframes and 12 x 300” each or R, G and B were combined using PixInsight and further processed in PS CS2.
(c) Alwyn Greer 2026
08 February 2026
This red light behind the door was perfect in matching the silhouette and stark contrast of the black and white interior of this store in London.
Comet 2017 E4 (Lovejoy) had a short "lifetime" after its discovery less than 7 weeks ago through Terry Lovejoy. Now the nucleus is desintegrated. To remember its beauty I reprocessed carefully some of the subframes of its highlight day: 2017-04-04 6:04h-6:15h UT. 18 subframes 30 sec each. Hyperstar 14" F1.9. Sony A7s (CentralDS cooled). Tenerife 1180 m altitude. FOV (diag.) 2.9°