View allAll Photos Tagged Subframing
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 22.58 and 23.09 EDT
(285 km by road north of Toronto)
* Temperature 17° C.
* Total exposure time: 6 minutes.
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Description:
The centre of our home galaxy, the Milky Way, lies in the constellation Sagittarius, which in the northern hemisphere summer lies low in the south at midnight.
In this view appear many favourite targets of amateur astronomers with modest telescopes, including the large glowing Lagoon Nebula at the lower right.
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@N06/28589630170
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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:
135 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, colour desaturation)
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Comet C/2016 R2, after a night of high fog and high humidity. Nevertheless, 20 subframes each were still usable. Here is the stack of monochrome images with blue filter. Later'll combine with the RGB subframes.
20 x 120 sec, blue filter, Hyperstar C14, ASI 1600 (cooled - 35°), Tenerife 1180 m a.s.l. 2018-01-09 1h UT
5 x 240s subframes- Testing out what Rho Ophiuchi looks like at 135mm.
Earth & Sky - Mount John University Observatory
This is the Rho Ophiuchi Cloud Complex, which lies near the summer Milky Way on the border between the constellations of Scorpius and Ophiuchus. This area is loaded with gas and dust, and is home to many deep sky objects. It is also one of the more colorful nebulae in the sky.
Image Info
Imaged from the KPO field in Saint Cloud, Florida.
Camera : ZWO ASI1600MM Pro, Gain set to 200
Lens: Canon 100-400 f/5.6L lens, set to 135mm
Mount: iOptron SmartEQ Pro
Red: 12 subframes of 300s = 60 min integration
Green: 8 subframes of 300s = 40 min integration
Blue: 10 subframes of 300s = 50 min integration
Luminance: 11 subframes of 300s = 55 min integration
Hydrogen Alpha: 2 subframes of 300s = 10 min integration
Total integration time: 215 min = 3.6 hours.
Captured via ASIAir Pro automation
Optical tracking via ASIAir automation, currently using ST4 mount control via the ASI120MM-S guide camera
Separate channels stacked and HaLRGB integrated in Astro Pixel Processor, and processing for light pollution sky fog removal
Image cropped, stretched, and noise processed in Nebulosity.
Final processing in Aperture
Another of my favourite winter objects. This is a stack of twenty-two eight minute subframes in H Alpha from tonight, 7 January 2016.
Peter
Equipment used: Atik460EX camera, HA filter, 0.75 reducer, 130mm triplet APO refractor and EQ8 mount
1991 Ford Sierra Sapphire 1.8 GLX.
Supplied by Evans Halshaw (Ford).
Last MoT test expired in January 2007.
It failed a test in October 2007 -
Offside Front coil spring cracked (2.4.C.1a)
Nearside Rear Subframe mounting prescribed area is excessively corroded (2.4.A.3)
The NGC 5367 reflection nebula in Centaurus. This is a LRGB composite, for about 8 hours, 16 minute subframes. TEC 140 refractor scope, camera STF8300/AO-8, from my backyard observatory, suburban skies, some airglow present. There is a rare shape of the interestelar dust at the right bottom...the little galaxy at the center have a tinny old supernova just visible...
La raramente fotografiada nebulosa de reflección NGC5367 en Centauro, 8 horas de exposición, LRGB, subframes de 16 minutos, telescopio refractor apo TEC 140, cámara STF8300/AO-8, desde mi observatorio en casa, cielos suburbanos, bastante airglow presente. Al costado derecho abajo se ve una zona de polvo estelar con forma llamativa, casi en angulo recto...la pequeña galaxia en el medio abajo tiene una supernova antigua apreciable al límite...
Zenos E10 S (2016) MX 66 LTK (2015-16) Engine 1998cc Ford Ecoboost S4 250bhp
Production est 100 (all E10 models)
Registration Number MX 66 LTK (Manchester)
The Zenos E10 is a mid-engined sports car designed and produced by Zenos, in Wymondham, Norfolk. First announced to the press in September 2013 with production starting in January 2015 and ceasing in January 2017.
The car features an aluminium spine to which a composite passenger tub and front and rear subframes are attached. The composite ‘tub’ of the E10 is formed of a ‘sandwich’ that comprises a thermoset plastic core contained between sheets of carbon fibre which it was claimed delivers 70% of the mechanical performance of full carbon fibre with a drastically reduced cost. The interior also incorporates an additional central screen, allowing the passenger to view information that would normally only be visible to the driver. The car features inboard front springs and dampers and replaceable GRP body panels, which are intended to reduce repair costs in the event of an accident
The E10 S is built the same but is powered by a turbocharged 2.0 L Ford EcoBoost engine, delivering 250bhp The E10 S accelerates from 0 to 97 km/h (0 to 60 mph) in 4.0 seconds, and can reach 233 km/h (145 mph) these figures were further boosted in September 2016 an upgrade kit was made available for the E10 S increased power output to 280bhp.
A third model the Zenos E10 R was launched at the Performance Car Show, Birmingham, in January 2016, intended more as a road and track day car it came with a higher powered Ford 2.3 litre Ecoboost engine of 350bhp, The E10 R has uniquely tuned suspension and brakes and a dry weight of 750kg. Standard equipment levels are higher than those of the E10 and E10 S, and include six-speed manual gearbox, ventilated disc brakes and uprated four-pot callipers, and twin-skin composite seats with four-point racing harnesses.
Diolch am 93,376,064 o olygfeydd anhygoel, mae pob un yn cael ei werthfawrogi'n fawr.
Thanks for 93,376,064 amazing views, every one is greatly appreciated.
Shot 24.04.2022 at the Sandbach Festival of Transport 159-131
Stack of the best 42 90 s subframes with an Optolong Luminance filter, taken from 2023-03-25 0526-0721 UT with a Celestron Edge HD 925 at focal length 1530 mm and an Atik 414-EX camera. The position of 2023dbc is indicated with the white line.
This is from my light polluted backyard in Long Beach, CA. I mostly wanted to see if I could image a supernova fainter than magnitude 16 from my backyard. Looks like the answer is yes.
2023dbc is a Type Ic supernova. That means the progenitor had shed both its hydrogen and helium layers before exploding. This means the progenitor would have been a Wolf-Rayet star.
Preprocessing in Nebulosity; registration, stacking, and initial processing in PixInsight; the background of light pollution was knocked down in Photoshop.
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Photographed from 04.49-04.53 EDT from the football pitch at Northern Secondary School in mid-town Toronto, Ontario, Canada
Sun 16.4° below the horizon
Venus altitude 11.5°
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Description:
In this high magnification image, small and distant but brilliant Venus sits among the stars of the constellation Gemini. If you download the large version of the image and open it on a desktop computer screen, between 90 and 100 stars to at least magnitude 11.0 can be seen.
Venus is always the third brightest object in the sky after the Sun and Moon, and can usually be seen in broad daylight if one knows exactly where to look, and Venus is not too close to the Sun. In 2025 Venus dominates the morning sky from May to November.
The brightest star in the field is 3.5 magnitude Wasat (Delta Geminorum), directly above (to the north of) Venus.
The field of view of this image is about 1.35° high by 2.13° wide.
For a version of this image WITH LABELS for 36 of the visible stars, click on the right side of your screen or click here:
www.flickr.com/photos/97587627@N06/54725453560
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Technical information:
Tele Vue NP127is 127mm (5") apochromatic telescope, mounted on a Sky-Watcher EQ6-R PRO SynScan mount
Twelve stacked frames; each frame:
660 mm focal length; 3 sec. exposure at f/5.2; ISO 200
Subframes stacked in AutoStacker
Processed in Photoshop CS6 (brightness, contract, levels, colour balance, vignette removal)
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This nebula is rich in ionized hidrogen and some interesting dark bands. Telescope GSO RC 30cms, camera STF8300/AO-8, 16min subframes, 5 hours total in Ha-L-RGB composite from my backyard homemade observatory at La Colonia, Illapel, Chile. Take care and have a good day!
Esta nebulosa de emisión ubicada en Puppis es rica en hidrogeno alfa y bandas oscuras. Imagen de 5 horas en Ha-L-RGB, telescopio GSO RC 30cms, camara STF8300/AO8, desde mi observatorio hecho en casa en La Colonia, Illapel, Chile; saludos y cuídense, que tengan un buen día...
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 00.12 and 00.45 EDT
(285 km by road north of Toronto)
* Altitude of the nebula at time of exposures: 55°, decreasing to 50°
* Temperature 5° C.
* Total exposure time: 15 minutes
* 2483 mm focal length telescope
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Situated in the heart of our Milky Way galaxy as it passes directly overhead during the summer in the northern hemisphere, the Crescent Nebula is a half ring of ionized hydrogen gas, which glows with a characteristic red-pink colour. The nebula has an angular size of 20' x 10', which makes it about 1/3 the apparent size (in area) of the Moon as seen from Earth.
From Wikipedia:
The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
It is a rather faint object located about 2 degrees SW of [the bright star] Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8 cm (with filter) can see its nebulosity. Larger telescopes (20 cm or more) reveal the crescent or a Euro sign shape which makes some to call it the "Euro sign nebula".
Click here to see a wider angle view of this region, which shows adjacent larger diffuse hydrogen gas clouds in the constellation Cygnus:
www.flickr.com/photos/97587627@N06/29549773051
Click here to see the equipment used to photograph this galaxy:
www.flickr.com/photos/97587627@N06/29939255555
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Nikon D810a camera body at prime focus of Meade 30 cm (12") LX-850 Schmidt-Cassegrain telescope, mounted on Astrophysics 1100GTO equatorial mount
Fifteen stacked frames; each frame:
2483 mm focal length; ISO 10,000; 60 seconds exposure at f/8, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness, contrast, levels, sharpening)
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This is M42, the Orion Nebula, from my backyard with an 8" Newtonian and a Canon 5D Mark II, 28 subframes, 20 darks and bias frames, and 10 lights. While I still need to learn more optimizations, and possibly a better tracker, I’ve never taken a better photo of a deep-space object.
Telescope: Celestron 11" EdgeHD + HyperStar (F/2)
Camera: QHY23M
Mount: CGEM-DX
HA- 10 subframes x 300 seconds each- mapped as green channel
OIII- 10 subframes x 300 seconds each- mapped as blue channel
SII- 10 subframes x 300 seconds each- mapped as red channel
2h 30m total
1985 Daimler 4.2 auto.
Last MoT test expired on 20th July 2024 (taxed to March 2025).
It failed a test on 21st June 2024 -
Nearside front steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) - Major
Nearside front subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Nearside front windscreen washer provides insufficient washer liquid (3.5 (a)) - Major
Nearside front windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii)) - Major
Offside front headlamp not working on main beam (4.1.1 (a) (ii)) - Major
Offside front windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii)) - Major
Offside rear suspension component mounting prescribed area excessively corroded significantly reducing structural strength outer sill (5.3.6 (a) (i)) - Major
Offside rear wheel bearing has excessive play (5.1.3 (a) (i)) - Major
Parking brake efficiency below requirements (1.4.2 (a) (i)) - Major
Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) - Major
Anglia Car Auctions, King's Lynn -
"Chassis number: SADDCRLP3CC431723. This 1985 Daimler 4.2 saloon is finished in Cirrus Grey with Buckskin interior, and has recently featured in Classic Jaguar magazine as a project car. It starts, runs and drives and now requires some welding and a pair of rear wheel bearings in order to pass an MoT. Registered in August 1985, the car's odometer shows 119,355 miles but the MoT history and bills suggest a speedometer change in 2012, so the actual total is believed to be around 170,000. Its MoT expired in July 2024 after being tested the year at an indicated 119,354 miles.
"Recent work - some of which has been chronicled in Classic Jaguar - has included the fitment of a 123 distributor, replacement of the leads and coil, rewiring work under the bonnet to the injectors, a full front brake rebuild, full front brake rebuild comprising new discs, pads and calipers, and fitment of LED dash bulbs using a kit from Better Car Lighting. There's also been the replacement of a number of dashboard decals to restore original appearance along with reapplication of badges to front wings and coachlines to the bodywork. The head gasket and water pump were replaced in early 2024, prior to the current keeper's ownership.
"Paperwork with the Daimler includes the V5C and most MoTs back to 1989. There's also a number of old tax discs back to 1989. The invoices total approximately £12,000 and there's also a main dealer print-out documenting all work from 1989 to 2001."
Estimate: £1500 - £2000. Sold for £1560 including premium.
Looking at HML,I can see the Encore Auto peaked in 1998 with 4.5k... now down to just 100. Although this one is MoT'd until the 6th of November, I can see it failed an MoT test on the 15th of October.
Test Result: Fail.
Reason(s) for failure
Service brake: efficiency below requirements (3.7.B.7)
Parking brake: efficiency below requirements (3.7.B.7)
offside front Front constant velocity joint gaiter deteriorated to the extent that it no longer prevents the ingress of dirt etc (2.5.C.1a)
offside rear Subframe mounting prescribed area is excessively corroded chassis leg (2.4.A.3)
nearside rear Subframe mounting prescribed area is excessively corroded inner sill (2.4.A.3)
nearside Seat belt anchorage prescribed area is excessively corroded outer sill (5.2.6)
offside rear Vehicle structure excessively corroded within 30cm of towbar mounting chassis leg (6.6.6)
offside front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
Advisory notice item(s)
washers need ajusting
offside rear Brake pipe slightly corroded (3.6.B.2c)
Lets hope it pulls through...
1997 Jaguar XK8 4 Litre auto.
Previously registered J20 AKS, JR 7237, J853 GGP, VOT 92 and P804 UAV.
Last MoT test expired in November 2015 (SORN).
It failed a test that month -
Nearside rear subframe mounting prescribed area is excessively corroded outer sill area (2.4.a.3)
Offside rear subframe mounting prescribed area is excessively corroded outer sill area (2.4.a.3)
Nearside brake pipe excessively corroded front to rear (3.6.b.2c)
My new winter project. A 1979 Mini 850. Its had rebuilt subframes and a reconditioned engine so drives really nice. I'm intending on a full respray fairly soon but still deciding on a colour!
1997 Citroen Xantia 2.1 TurboD VSX.
Scrapped.
Last MoT test expired in October 2019.
It failed a test that month -
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside front anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) - Major
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Photographed at Algonquin Provincial Park, Ontario, Canada, between 23.24 and 23.38 EDT
(285 km by road north of Toronto)
* Temperature 12° C.
* Total exposure time: 7 minutes.
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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.
The bright stars of Cygnus form the distinctively-shaped "Northern Cross"; you can see the star pattern in the labelled version of this image by clicking on the right side of your screen, or by clicking here: www.flickr.com/photos/97587627@N06/35914896420
One of the most distinctive red hydrogen gas clouds is the aptly named "North America Nebula", left of and a little below centre. For a close-up view of this nebula made with a 400 mm lens, click here:
www.flickr.com/photos/97587627@N06/19933485213
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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
Seven stacked frames; each frame:
50 mm focal length
ISO 3200; 1 minute exposure at f/4; 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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Running through a film in a short timeframe means going to places you can be certain of a few shots. Old Fergie's cottage (Glenside) in Fin Glen meets that description nicely. It's sad that he never fulfilled his dream to renovate this ruin, but the place has loads of character.
I didn't take notes as I was taking these shots, but I think this was taken with the Auto-Takumar 55/1.8.
Straighten and crop a little in PP. Darkened LHS of window frame slightly.
NGC 281 is the star cluster at the centre of the 'Pac-Man' nebula in Cassiopeia. This is a view in Hydrogen Alpha through my f/10 12inch SCT. At the top left are a number of star forming regions. This is a stack of thirteen five-minue subframes.
Peter
Atik 314L+ with Sigma 70-300 zoom lens (set to 135mm) and Baader 7nm Ha filter (1.25") piggybacked to main scope on a CEM60
Six subframes of ten minutes each stacked in Deepskystacker and processed in PS CS2.
Taken on 29th Sept 2021
Comet 2017 E4 Lovejoy from this morning. During only half an hour the the morphological changes in the tail are enormous. I was very happy the capture the evolution of a disruption event finally visible in the right most image. Each of these 12 images are a stack of 5 subframes with a total exposure time of 150 sec each. The most important for me is to realize, what happens, when you use total exposure times of 10 or 20 or 30 minutes and stack these subframes. There is a smear effect resulting in 'impressiv' tails which are totally fake (If you would stack 10 pictures of a jumping person, you would not be able to see the person but instead a smeared tall something). I myself made this mistake in the past and I saw the same artificial tails in the images of some well known comet photographers in the past days. I think we have to rethink our imaging techniques in regard of the total exposure time at least in the case of comets with such a fast changing morphology. Please follow this link to see the details very clear from one 2 1/2 minute step to the next one.
Technique: 12 x 5 x 30 sec. Hyperstar 14" F1.9. Sony A7s (CentralDS), ISO 3200, UV/IR cut filter. FOV 1.7° (horizontal). 2017-04-04 6:26h - 6:56h UT, Tenerife 1180 m altitude.
1992 Ford Fiesta 1.3 LX 3-door.
Supplied by Trimoco of Chelmsford.
Scrapped.
Last MoT test expired in July 2015.
It failed a test in June 2015 -
Offside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside rear subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Offside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Spare wheel carrier insecure (6.4.2)
2001 Vauxhall Zafira 1.6 16v Club.
Scrapped (last MoT test expired in June 2023).
It failed a test that month -
Brake drum back plate insecure excess corrosion lower (1.1.14 (d)) - Major
Nearside rear service brake excessively binding (1.2.1 (f)) - Major
Offside front lower subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Rear suspension spring mounting prescribed area excessively corroded significantly reducing structural strength both sides (5.3.6 (a) (i)) - Major
I've seen a suggestion that this be named Teddy Bear Nebula. I'm open to suggestions.
Dwarf III • 999 15-second subframes • Gain: 30 • Duo filter
This is an entirely new image from me using data captured on the nights of 29/30 December and 30/31 December. I wasn't totally happy with my last posting of these two beautiful and stunning nebulae, so I started again in the hope of bringing out more detail. The left-hand image is a Hydrogen Alpha stack of eighteen seven-minute subframes. The right-hand image has used the Hydrogen Alpha data as the luminance and red then I have added green and blue data. The final colour has been balanced to bring out the contrast in the Flame nebula. A total image time of 220 minutes.
Peter
Equipment used: 130mm triplet APO, Atik383L+ mono CCD, HA, Green and Blue filters, EQ8 mount.
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Photographed from mid-town Toronto, Canada, at 21.05 EDT (Venus altitude: 28.3° | Sun 14° below the horizon)
* Temperature 10° C.
* Total exposure time: 17.5 seconds
* 1253 mm focal length telescope
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Description:
Venus is always the most brilliant planet in the sky, and the third brightest celestial object (as seen from Earth) after the Sun and Moon.
The star cluster M45 (commonly known as the Pleiades or the "Seven Sisters") is the best known star cluster in the sky, and is easily visible to the unaided eye, even from light polluted cities (if the sky is very clear).
During this week, Venus approaches very close to M45, and the pair of objects can be seen high in the western sky after sunset, and even into complete darkness.
In this view, composed of 7 stacked identical exposures of 2.5 seconds each, brilliant Venus is at the right side, and the stars of the Pleiades are strewn across the frame to the left.
With long exposures from a good dark sky location, distinctive blue reflection nebulosity surrounds the Pleiades, as seen in this photograph from Sept. 2017:
www.flickr.com/photos/97587627@N06/36660736734
For a version of this photo WITH LABELS showing star names and brightnesses, and the star pattern of the Pleiades, click on your screen to the RIGHT of the photo, or click here:
www.flickr.com/photos/97587627@N06/49730260383
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Technical information:
Nikon Z7 camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Sky-Watcher AZ-EQ6 SynScan mount.
Seven stacked subframes; each frame:
1253 mm focal length
ISO 800; 2.5 seconds exposure at f/8, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11 degrees C.
* Total exposure time: 10 minutes.
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Description:
Our home galaxy, the Milky Way, runs through the constellation Scutum (the Shield) high in the northern hemisphere summer sky. Dense clouds of stars are obscured in places by winding lanes of dark foreground gas.
In the middle of the frame, just below centre, is a tightly packed open cluster of stars, called M11, or the "Wild Duck" cluster, because of its appearance in a telescope.
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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
Ten stacked frames; each frame:
145 mm focal length
ISO 5000; 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, colour desaturation)
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My first try at shooting the orion nebula. This was imaged on October 5, 2008 with a Canon 300D attached to a Celesron C6-N at prime focus. Telescope was guided using a Meade 70AZ-Z and SPC900NC webcam using PHD Guiding.
Specifics:
14 x 120s subframes ISO800
10 x 30s subframes ISO800
Subframes were stacked using Iris. Final processing was done in PS CS3.
1997 SAAB 900 XS 5-door.
1985cc.
Last MoT test expired in April 2017 (SORN).
It failed a test in March 2017 -
Nearside front subframe mounting prescribed area is excessively corroded to rear of front wheel arch (2.4.a.3)
Offside front suspension spring mounting prescribed area is excessively corroded front wheel arch (2.4.a.3)
Offside windscreen wiper does not clear the windscreen effectively (8.2.2)
Dates: 23-24, 26-28 April 2025
Location: Washington D.C.
Equipment:
ASI 2600MM Pro (monochrome) camera
Chroma 36mm LRGB Filter Set
WO Fluorostar 91mm f/5.9 triplet APO refractor with Adjustable Field Flattener 68III
iOptron GEM28-EC mount
Data and exposure times:
Data was acquired as LRGB images with the following exposure times:
14.11 hours (242x210s subs) with Luminance filter (L).
3.50 hours (60x210s subs) with Red filter (R).
3.56 hours (61x210s subs) with Green filter (G).
3.44 hours (59x210s subs) with Blue filter (B).
Atmospheric conditions:
The shown image was developed from data acquired in a Bortle Class 8 area (i.e. in an environment experiencing a degree of light pollution typical of a city) where the sky quality during observation was such that both transparency (i.e. the level of atmospheric clarity) and seeing (i.e. the level of atmospheric turbulence) varied from average to below average.
Processed in PixInsight.
Preprocessing notes:
Created LRGB "masters" by Calibration, Cosmetic Correction, Weighted Subframes, Star Alignment, and Integration.
Postprocessing notes:
a. Dynamic Cropping of LRGB masters each to the same dimensions having a 3:2 aspect ratio.
b. Applied a Screen Transfer Function to view the resulting images.
c. For the L master: Applied a Dynamic Background Extractor and saved the settings to be used later when applying a DBE on the RGB masters.
d. Applied BlurXT and NoiseXT.
e. Applied a Histogram Transformation. This step generated a nonlinear image which was saved as a postprocessed L image.
f. "Built" a color image from the R, G and B masters by using LRGB Combination and applied a DBE to the color image using the same DBE settings as used for the L master.
g. Since a color image is involved, this necessitated the application of Background Neutralization and Color Calibration to the result from step f above.
h. Applied BlurXT, NoiseXT and a Histogram Transformation. Saved the nonlinear result as a postprocessed RGB image.
i. Used LRGB Combination to "apply" an instance from the postprocessed L image to the postprocessed RGB image.
j. Applied StarXterminator to create starless (i.e. containing the target image - in this case M51) and stars-only images.
k. Processed the starless image, after applying a range selection mask to protect the background area, using Local Histogram Equalization, Curves Transformation and Color Saturation. Curves Transformation was used only to boost the saturation whereas Color Saturation was used to enhance specific color hues.
l. Applied SCNR (Subtractive Chromatic Noise Reduction). Removed mask and used an expression in Pixel Math to combine the result from step k above with the stars-only image from step j.
m. As a final step, after protecting the target image with a Star Mask, applied a (star reduction) Morphological Transformation to the result from step l above.
1997 SEAT Toledo TDi SXE.
Scrapped.
Last MoT test expired in January 2014.
It failed a test that month -
Nearside headlamp not working on dipped beam (1.7.5a)
Offside registration plate lamp not working (1.1.c.1d)
Offside rear position lamp(s) incorrect colour (1.1.a.3e)
Shock absorber has an excessively worn bush (2.7.4)
Nearside rear upper suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear upper suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Nearside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Offside front seat belt anchorage prescribed area is excessively corroded (5.2.6)
Nearside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Offside front subframe mounting prescribed area is excessively corroded (2.4.a.3)
Nearside rear suspension component mounting prescribed area is excessively corroded (2.4.a.3)
Offside rear suspension component mounting prescribed area is excessively corroded (2.4.a.3)
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11° C.
* Total exposure time: 8 minutes.
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Description:
High in the northern hemisphere summer and autumn sky our home galaxy, the Milky Way, runs through the constellations Cepheus (centre) and Cygnus (right side).
This area of the sky is riddled with glowing red clouds of hydrogen gas, numerous star clusters, and areas of dark foreground gas that obscures the light of millions of stars beyond.
Above and to the left of centre is the bright circular red gas cloud IC 1396. For a close-up view of this nebula made with a 540 mm focal length telescope later this evening, click here:
www.flickr.com/photos/97587627@N06/30787835700
One of the most distinctive gas clouds is the aptly named "North America Nebula", just below and a little right of centre. For a close-up view of this nebula made with a 300 mm lens, click here:
www.flickr.com/photos/97587627@N06/29220929561
For a version of this photo WITHOUT labels, click on the left side of your screen, or click here:
www.flickr.com/photos/97587627@N06/31155672715
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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
Six stacked frames; each frame:
50 mm focal length
ISO 2500; 1 minute exposure at f/4; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance, colour desaturation)
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