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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
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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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First light with QHY294C OSC / one-shot color/ camera . Testing for best setting and best capturing software but weather not cooperating, nice hot beautiful summer days but hazy nights. For this stack, I choose only 23 subframes, 60 sec each from 100 's using SubframeSelector in PixInsiaght. I hope I'II grab more and reprocess image soon. All processing done in PI included StarMask, all bright stars saturated so I did not touch them. This camera is so sensitive and captures so many bright stars especially on Milky Way take so much time to process. I used a Sequence Generator, When I am using SharpCup I am not relaxed because is downloading all the time video frames and crushing often.
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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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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.
I think this could sum up a lot of emotions right now as our world is stood still but working together for the greatest cause.. it is such a strange and weird time - it’s almost like your body has been granted the rest it’s been craving, you’ve been unplugged from the mains and the subframe you were running and given a chance for repairs - and that is truly how I felt at the beginning of this lockdown.
This week would be a month for me in lockdown and it’s been so surreal, it’s been a weird mix of trying to understand what I am meant to do with my life now... enjoying the rest but worrying and overthinking about everything that’s not happening or not going to happen and one point at the beginning just feeling like shutting down.
However I have such a wonderful support network and I’ve been to be more in control now I’ve got used to the idea of having to stay indoors. And like me I know that each of you reading this are going through your own process - but that’s okay! You don’t need to be at someone else’s stage in this process - live each day to your fullest - do what you feel you can and want to do! There is no right or wrong in this!
One thing I do have to say though is that this is a weird feeling knowing that the next series of images that will be coming out by me are all of me! I don’t do self portraits a lot but this I see as creative challenge ☺️ and this is the first image I got to edit using Adobe lightroom! I’m certainly starting to branch out my creativity and I can’t wait to see how it goes 🙌
Let me know what you think and what you’re doing to stay sane ☺️
Dumbbell Nebula taken from my backyard @ Tiny , Ontario, Canada . Through my TS APO 130 mm refractor with ASI294MC camera .Stack of 120 subframes x120 seconds exposure time each and processed in PixInsight .I used STC ASTRO DUO - Narrowband Filter .You can see easy hot gas bubbles and shockwaves distribution . Nebula with stars coming soon as possible I
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.
Featuring the bright star Merak of Ursa Major.
Dwarf 3
45-second subframes | 5 hours total (over two nights)
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"
I believe this is the first time I've taken a photo of this nebula.
Seestar S50 180 thirty second subframes. Polar alignment.
1988 Citroen BX 17 RD.
Scrapped.
Last MoT test expired in June 2015.
It failed a test in July 2015 -
Windscreen wiper does not clear the windscreen effectively (8.2.2)
Windscreen washer provides insufficient washer liquid (8.2.3)
Offside rear subframe mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear vehicle structure excessively corroded within 30cm of towbar mounting (6.6.6)
Nearside rear suspension arm has excessive play in a pin/bearing (2.4.g.2)
Offside rear suspension arm has excessive play in a pin/bush (2.4.g.2)
Nearside rear tyre tread depth below requirements of 1.6mm (4.1.e.1)
Offside rear tyre tread depth below requirements of 1.6mm (4.1.e.1)
Front brake hose excessively deteriorated (3.6.b.4d)
Front parking brake recording little or no effort (3.7.b.6a)
Parking brake: efficiency below requirements (3.7.b.7)
While the first short session, I took five images each 900 seconds. Focus was perfect, then while the second session, I assumed that, after a autofocus run in SGP, the focus was nearly the same...but is was not! Fortunately I corrected focus for at least three images.
The guiding was not to bad, but most of the subframes have slightly elongated stars.
It is not easy to find the correct PHD parameters to get the best guiding...
IMAGE ACQUISITION DETAILS
Location: My backyard
Date: 14.10.17 + 16.10.17
Exposures:
-Ha: 9 x 900s
Binning: 1x1
CCD Temp: -20°C
Total integration time: 2.25 hours
EQUIPMENT
Camera: SBIG STF-8300
Filter: Astronomik H-Alpha 6nm
Telescope: TS ONTC 10" f4.7
Corrector: TS Wynne 2.5" Coma Corrector
Mount: Astro-Physics 1100 GTO CP4
Guiding: Starlite Xpress Lodestar X2, Skywatcher 80/400
SOFTWARE
Acquisition: Sequence Generator Pro
Guiding: PHD2
Processing: Pixinsight
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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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(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.
This is the Milky Way from Mesa Verde National Park in Colorado. There’s tremendous detail in this image! I may annotate it later. That’s Jupiter there on the left, with the constellation of Sagittarius just to the lower right – it looks like a teapot. The upper left area is the Scutum star cloud. On the lower right is the “prancing horse”, a dark nebula that obscures the background stars.
Image Info
Two part image – a single image of the trees, and a stack of 20 subframes for the stars. 20 subframes of 30 seconds each, all at ISO 3200. Canon 60D with no filter, mounted on an iOptron SmartEQ equatorial mount. Subs captured and stacked in Nebulosity, processed in StarTools, trees image layered in Photoshop, and the whole thing finished in Aperture.
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°
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 00.13 and 00.35 EDT
(285 km by road north of Toronto)
* Temperature 18° C.
* Total exposure time: 10 minutes
* 660 mm focal length telescope
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Description:
M13 globular star cluster: One of the showpieces of the northern hemisphere spring sky is this bright globular star cluster, the sixth brightest in the sky, which is faintly visible to the unaided eye in a dark sky.
M13, which contains about 300,000 stars, was discovered by Edmond Halley in 1714, and catalogued by Charles Messier in June 1764. It is about 145 light years across and lies 25,000 light years from our solar system.
Globular star clusters are ancient objects, originating very early in the history of the universe. M13 is estimated to be 11.7 billion years old.
NGC 6207 galaxy: This spiral galaxy is near the top edge of the frame, a little left of centre. It is located about 30 million light years from our own Milky Way galaxy, and was discovered by William Herschel in May 1787. It shines with an apparent magnitude of 11.7 - 12.2 and is ~34,000 light years in diameter (compared with the Milky Way's diameter of ~100,000 light years).
Compare this image with a photo made with a much longer (1253 mm) focal length telescope in October 2017:
www.flickr.com/photos/97587627@N06/37611993040
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Technical information:
Nikon D810a camera body on on Tele Vue 127is (127 mm - 5" - diameter) apochromatic refracting telescope, mounted on Sky-Watcher EQ6-R Pro mount
Ten stacked frames; each frame:
660 mm focal length
ISO 1600; 1 minute exposure at f/5.2; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (shadows / highlights, levels, brightness, contrast, colour balance)
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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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PK 164+31.1 is a faint and interesting planetary nebula.
Also called Jones-Emberson 1.
It is 14th magnitude, at a distance of 1600 ly.
The central star is a blue white Dwarf star with magnitude 16.8.
Imaged from Deep Sky West - Rowe New Mexico, using RCOS 14.5" Ritchey–Chrétien telescope f/9. 3340 mm focal length.
Transparency and Seeing very good to excellent.
February, 2017
False color HOO, with RGB stars.
12 hours H Alpha, and 9 hours 30 minutes OIII.
30 minutes subframes.
An additional 2 hours each of RGB .
26.5 hours total exposure
Processed in Pixinsight, and Lightroom.
SBIG 16803 CCD,AO-X
This week's FlickrFriday theme is: #Subframing
Le thème de ce FlickrFriday est: #Sous-ossature
O tema desta FlickrFriday é: #Sub-enquadramento
本次 FlickrFriday 主題: #子框架
FlickrFriday-Thema der Woche: #Unterrahmen
El tema de FlickrFriday es: #Sub-encuadre
Sub-framing is a type of compositional photography technique wherein one or more photo elements are framed by another element. It's a good way to add interest to the photo, lead the viewer's eye towards the middle of the sub-frame, and emphasize a subject.
The North America Nebula, NGC 7000 is an emission nebula in the constellation Cygnus, close to the star Deneb. The Nebula covers a region more than ten times the area of the full moon, but its surface brightness is low, so normally it cannot be seen with the unaided eye. The portion of the nebula resembling Mexico and Central America is known as the Cygnus Wall. This region exhibits the most concentrated star formation.
Skywatcher 8" f4 Quattro reflector
Skywatcher EQ6-R Mount
ZWO ASI2600MC Duo main camera
ZWO ASI 120MM Guide Camera
Optolong L-Pro filter
16Hrs of integrated 3min subframes captured over four nights
Pixinsight and Adobe PS
Flickr Friday theme subframing. On the other side of this arch is the doorway to the old hospital. But from that side all you see is the highway. ,;-)
Full Write-up here: theastroenthusiast.com/the-interacting-triplet-of-m81-m82...
This incredibly detailed image of the interacting triplet M81, M82, and NGC 3077 was created from more than 216 hours of exposure across three continents — Europe, USA, and Oceania. We combined 4019 subframes and 12993 minutes of exposure to reveal faint details previously masked by lower amounts of data. The high exposure time also allowed us to sharpen fine features, giving the image more contrast and revealing more fine structures.
On the top of the image lies NGC 3077, a small starburst dwarf galaxy with a starforming core. Below lies M81, a grand design spiral about 12 million light years away. To the right is M82, a starburst galaxy with a huge superwind triggered by interaction with M81 and NGC 3077. All around the image is the galactic cirrus, dust lit by the glow of the milky way. I highly recommend looking at the image with HI emission overlaid, which displays what of the background is neutral gas from the interactions and what is dust from the milky way.
Website: theastroenthusiast.com/
Instagram: www.instagram.com/the_astronomy_enthusiast/
I know neither the bride nor the groom but all have accepted me as a part of the event. I could have easily join the celebration!
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Photographed from mid-town Toronto, Canada, at 23.30 EDT on Jan. 13 and again the following night, just after midnight (Jan. 15, at 00.30)
* Temperature -6° C. the first night; 0° C. the second night
This two-frame assemblage shows how the appearance of the Moon changes in one day (well, in this case 25 hours), as the terminator (the dividing line between day and night) moves from right to left across the visible face of the Moon. On average, the terminator moves across the Moon's face about 12.7° per 24 hours, as the Moon orbits planet Earth once per month.
In the right frame, the Moon is 96.2% illuminated by the Sun; in the left frame, the illuminated portion has decreased to 90.6%.
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Nikon D810 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Sky-Watcher AZ-EQ6 SynScan mount.
1200 mm focal length, f/8
* ISO 100, multiple stacked 1/250 sec. exposures
Subframes stacked in Registax
Processed in Photoshop CS6
(brightness, contrast, colour desaturation, sharpening, image rotation)
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The BMW R nineT is a standard motorcycle made by BMW Motorrad since 2014. It is a retro styled roadster marketed by BMW to custom builders and enthusiasts as a "blank canvas for customizing".
The BMW R nineT has several design elements configured to allow the bike to be easily modified, such as separate engine and chassis wiring harnesses and minimal bolts attaching the rear subframe, tail lights, and headlight.
The R nineT version of the bike has upside-down (USD) telescopic forks rather than BMW's usual Telelever front suspension. The other versions have conventional telescopic forks.
All variations have an air/oil-cooled oilhead flat twin (or boxer) 1,170 cc (71 cu in) engine, which has the inlet manifold at the rear of the cylinders and the exhaust at the front. The oilhead is arguably[by whom?] more suitable for customization as it has a more conventional appearance than the new water-cooled engine.
The R nineT Scrambler knows no conventions: rough, unadapted, individual. Its handling is balanced and unique. With the boxer, you can ride around with your head held high, it is available for every spontaneity. And the typical Scrambler look together with the relaxed seating position makes a lot of difference – and above all is a lot of fun. Design your R nineT Scrambler so that it fits perfectly into your life. No matter what the others say. Just typical Soulfuel.
Turn on the power: With the air/oil-cooled boxer of the Scrambler, you can do this in a playful way. We have optimised its power and torque curve and noticeably increased it in the 4,000 to 6,000 rpm range. This way, you have the power exactly where you need it and can remain powerful and completely relaxed out on the road. The peak torque remains at 116 Nm at 6,000 rpm. And of course the boxer complies with the Euro 5 standard.
Last night was a good night. I was able to get over 200 1-minute light frames (I use short exposures because of the excessive light pollution in my urban/suburban location; seems to work better for me. There was also a bit of moonlight to deal with.)
No experimenting with the Hubble Palette.
September 27, 2026; Tallahassee, Florida. Bortle 7/8, average transparency, average seeing. 206 1-minute subframes, calibration frames, AT60ED (f/6), ASI533MC Pro, L-Ultimate dual narrow-band filter, Sky Watcher GTi. I used an ASIAir for control; AstroWizard and PS for post processing.
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Photographed near Coober Pedy, South Australia
(Outback Australia, 850 km northwest of Adelaide;
latitude 29 degrees south)
* Total exposure time: 10 minutes.
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Description:
This view of the centre of our home galaxy - the Milky Way - lies in the familiar constellations Sagittarius (left side) and Scorpius (right side). This part of the cosmos is always very low in the sky as seen from the northern Hemisphere.
When I captured the ten subframes that comprise this image, the constellations Sagittarius and Scorpius were almost directly overhead. The dark sky of the Australian Outback makes for a dramatic, high-contrast view.
Here is the equipment used to make this image:
www.flickr.com/photos/97587627@N06/21202535154
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Technical information:
Sigma 50mm f/1.4 DG HSM Art Lens on Nikon D810a camera body, mounted on Sky-Watcher Star Adventurer tracking mount with a Kirk Enterprises ball head
Ten stacked frames; each frame:
50 mm focal length
ISO 2500; 1 minute exposure at f/4.5
(with LENR - long exposure noise reduction)
Stacked in RegiStar;
Processed in Photoshop CS6 (brightness, contrast, levels, colour balance, colour desaturation)
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 02.57 and 03.16 EDT
(285 km by road north of Toronto)
* Altitude of the nebula at time of exposures: 46-50°
* Temperature 10° C.
* Total exposure time: 16 minutes
* 660 mm focal length telescope
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Description:
This faint and visually very elusive nebula can be photographed to advantage only in a good dark sky.
Known as the "California Nebula" because of its shape, this glowing cloud of red hydrogen gas is quite large; about five times as long as, and a little wider than, the Moon appears in our sky. The nebula is located 1,000 - 2,000 light years from our solar system, and is about 100 light years from end to end. Radiation from the nearby blue-white star Xi Persei (the brightest star in the frame, below the nebula) causes the nebula to fluoresce.
The California Nebula was discovered by famed American astronomer E.E. Barnard in 1884-5, just in time to be added to Dreyer's New General Catalog (NGC).
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Technical information:
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on iOptron CEM40 equatorial mount
Sixteen stacked frames; each frame:
660 mm focal length
ISO 5000; 1 minute exposure at f/5.2; unguided
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, colour balance, levels, colour desaturation)
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