View allAll Photos Tagged Subframing
I took an image of the Heart Nebula back in the autumn of 2013. While working on that image I was struck by the beauty of IC 1795, the appendage protruding from the "point" of the heart. At that time I acquired a few Ha subframes of IC 1795, but didn't get enough for an image. It's been on my unfinished business list since then.
This year while I was tuning the 16" I thought I'd use some of the time I was testing tracking accuracy to try to check IC 1795 off my todo list. This is the result.
The Heart Nebula itself is IC 1805/SH2 190. The gorgeous center of this nebula is a complex structure that I interpret as being a typical dust pillar, but seen from above rather than the side. If this is the case, then Melotte 15, the star cluster powering this entire complex, must be in front of the central pillar complex. Perhaps the Heart Nebula isn't so heart-shaped at all. It's a more typical hollow cavity, with an incredibly dense pillar on its far inner wall.
There is a considerable amount of oxygen and sulfur in this nebula. This indicates that it is older and much more evolved than most starbirth regions where these elements are much more rare. This is supported by the relative sparseness of Melotte 15. Perhaps many of its original members have been gravitationally ejected from the system and have entered the general population of the galaxy.
Sometimes when I take an image, I ultimately end up rather unimpressed by the result. Not too many people see those results. This one, though... I'm really pleased with this one. This goes into my picture book, and maybe even on my wall :)
This is 28x900Ha, 12x900OIII, and 13x900SII for a total of 13,25 hours of imaging on the Twin City Amateur Astronomers - TCAA.16" AG Optical Systems imaging Harmer-Wynne.
******************************************************************************
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
___________________________________________
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
___________________________________________
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)
******************************************************************************
Year of first registration: 1992.
The GTM Rossa is a Mini based 2+2 kit car by GTM Cars.[1] The car was based on two front mini subframes, with the steering being locked on the rear subframe. The Mark 1 car was produced from 1987 to 1990, and the Mark 2 car was produced beginning in 1990.
Bron: Wikipedia.org
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
******************************************************************************
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.
___________________________________________
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
___________________________________________
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)
******************************************************************************
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
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)
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
1999 Vauxhall Astra 1.6 Club 4-door.
Last MoT test expired in December 2021 (SORN).
It failed a test in November 2021 -
Nearside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
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)
This is a test for FOV with the AT65EDQ w/the QHY9M, I need a ton more subframes. Rotated for correct orientation
Lum 3x600 (no bin)
RGB 3x300/each binned 2x2
AT65EDQ
QHY9M
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.
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
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
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.
******************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11 degrees C.
* Total exposure time: 10 minutes.
___________________________________________
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.
___________________________________________
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)
******************************************************************************
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)
M31 The Andromeda Galaxy is located in the Andromeda Constellation
Location: Waterloo, ON (red zone)
Date: Aug 4 & 10 2019
RGB Image comprised of the following subframes:
Red 30x2min Chroma filter
Green 31x2min Chroma filter
Blue 31x2min Chroma filter
Total Integration: 3hours 4 minutes
Effective Focal Length: 348 mm
Imaging Camera: ASI1600MM
Mount: AZ-EQ5
Filter Wheel: QHYFW2
Gain: 139
Guide Camera: QHYIII5224MC via QHY-OAGM
Image capture and auto-focus via SGP.
Image processing & calibration: Pixinsight
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)
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.
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 lÃmite...
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.
******************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11° C.
* Total exposure time: 8 minutes.
___________________________________________
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
___________________________________________
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)
******************************************************************************
The planetary nebula NGC 3242, also knowed as "Ghost of Jupiter", a small, difficult and interesting object in Hydra constellation. This target needs short subframes (3min) because long ones burn the core of the planetary. About 30 subframes in LRGB, GSO 30 cms scope+STT8300/AO-8 unit, from La Colonia, Illapel, Chile; Suburban skies.
La nebulosa planetaria NGC3242 en Hydra, también llamada "el fantasma de Júpiter", por su aspecto al mirarla al ocular. Es un blanco pequeño y difÃcil. Requiere subexposiciones cortas (3min) pues las largas usuales queman el núcleo. Telescopio GSO de 30cms+cámara STT8300/unidad AO-8, desde La Colonia, Illapel, Chile. Cielos suburbanos.
1997 Ford Fiesta 35 van operated by G Cook & Sons Ltd, Cambridge.
1753cc diesel.
Ex-BT.
Scrapped.
Last MoT test expired in August 2015.
It failed a test in November 2015 -
Offside headlamp aim too low won't adjust (1.8)
Nearside front subframe mounting prescribed area is excessively corroded outer sill (2.4.a.3)
Nearside seat belt anchorage prescribed area is excessively corroded outer sill (5.2.6)
Offside front subframe mounting prescribed area is excessively corroded outer sill (2.4.a.3)
Nearside front subframe mounting prescribed area is excessively corroded floor below seat (2.4.a.3)
Offside rear suspension component mounting prescribed area is excessively corroded inner sill (2.4.a.3)
Offside rear suspension component mounting prescribed area is excessively corroded outer sill (2.4.a.3)
Nearside rear suspension component mounting prescribed area is excessively corroded inner sill (2.4.a.3)
Nearside front front constant velocity joint gaiter deteriorated to the extent that it no longer prevents the ingress of dirt etc (2.5.c.1a)
I used a dead tree to subframe this iron age hill fort for the 'Something Old' challenge in the Take Aim challenge group.
Note the relief band vent grille from RML2306 bottom right corner which was lying on a Routemaster subframe
1990 Mercedes 300SE auto.
Last MoT test expired in September 2011.
It failed a test in November 2017 -
Nearside Front Brake hose ferrule excessively corroded (3.6.B.4e)
Offside Front Brake hose ferrule excessively corroded (3.6.B.4e)
Offside Front suspension has excessive play in a lower suspension ball joint (2.5.B.1a)
Nearside Registration plate lamp not working (1.1.C.1d)
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings near subframe mount (6.1.B.2)
Offside Rear Brake pipe excessively corroded to hose (3.6.B.2c)
M 106, a large spiral galaxy in the constellation Canes Venatici, captured 0n 5-20-2017 at GNTO in Belen New Mexico, 18 x10' subframes captured with a C 11 Edge with focal reducer (f/7,1960 mm), an SBIG ST4000 XCM and a Losmandy G-11. Processing done with DSS and PI,
******************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11 degrees C.
* Total exposure time: 10 minutes.
___________________________________________
Description:
Our home galaxy, the Milky Way, runs through the constellation Cygnus (the Swan) high in the northern hemisphere summer sky. Dense clouds of stars are obscured in places by winding lanes of dark foreground gas.
The red appearance of glowing clouds of hydrogen gas, the colours of which cannot be seen with the human eye, are revealed by the digital camera's sensor in long exposure photographs.
One of the most distinctive gas clouds is the aptly named "North America Nebula", to the left of centre. For a close-up view of this nebula made with a 400 mm lens, click here:
www.flickr.com/photos/97587627@N06/19933485213
For a version of this photo WITHOUT labels, click here:
www.flickr.com/photos/97587627@N06/27422508523
___________________________________________
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
Ten 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)
******************************************************************************
******************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 11 degrees C.
Total exposure time: 15 minutes.
* 540 mm focal length telescope
___________________________________________
Description:
This is a large and quite faint emission nebula and star forming region over 100 light-years across, located about 2,400 light-years away in the constellation Cepheus. It is energized by the bright, bluish central multiple star. The very small Elephant’s Trunk nebula (IC 1396A) is inside the dark elongated globule just to the right of centre.
From one web site: "The brightest star (38,000 times brighter than the Sun) ... [at the lower left edge of the nebula] is mu Cephei. It is a red supergiant star with a diameter larger than the orbit of Saturn, some 2536 times the diameter of the Sun. It is one of the largest stars we know of. Also called Herschel’s Garnet Star, mu Cephei is a variable star that varies in magnitude from 3.4 to 5.1 over a period of approximately 730 days."
For a view of this same nebula made with a 200 mm lens on July 1 of this year, click here:
www.flickr.com/photos/97587627@N06/28078652915
For a version of this photo WITHOUT LABELS, click on your screen to the LEFT of the photo, or click here:
www.flickr.com/photos/97587627@N06/30787835700
__________________________________________
Technical information:
Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Fifteen stacked frames; each frame:
540 mm focal length
ISO 6400; 1 minute exposure at f/5.4; unguided
(with LENR - long exposure noise reduction)
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, colour balance, levels)
******************************************************************************
******************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Temperature 10 degrees C.
* Total exposure time: 12 minutes.
This supernova remnant is faintly visible in binoculars as elusive grey strands. The colours are revealed with the digital camera sensor using long exposures.
From Wikipedia:
"The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop (radio source W78, or Sharpless 103), a large but relatively faint supernova remnant. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, or 36 times the area, of the full moon). The distance to the nebula is not precisely known, but Far Ultraviolet Spectroscopic Explorer (FUSE) data supports a distance of about 1,470 light-years."
__________________________________________
Nikkor AF-S 80 - 400 mm f/5.68G ED VR lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Six stacked frames; each frame:
400 mm focal length; ISO 8000; 2 minutes exposure at f/8
(with LENR - long exposure noise reduction); unguided
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels)
******************************************************************************