View allAll Photos Tagged Subframing
Used my 6" f7 apo triplet and DSLR with UHC filter to capture 5 subframes at 15 minutes each. Stacked and darkframe (7) calibrated in Deepskystacker and processed in Photoshop.
Image taken early hours 6/11/16
This is a small part of the Rho Ophiuci complex, a nice zone of the sky toward the center of our Milky Way galaxy. Within the image you could see dark nebula, dust clouds, star-forming regions and part of the reflection nebula IC 4603 (blue, to the left). Nefertiti's head or a dark angel, whatever you think of the silouette, has also interesting views rotating the image. TEC 140 refractor scope, camera Sbig STF8300-AO/8, 7.5 hours in LRGB exposure, 12 min subframes, from my backyard obs at La Colonia, Illapel, Chile.
Esta imagen es una pequeña parte del complejo nebular cercano a la estrella Rho Ophiuci,hacia el centro de nuestra galaxia la Vía Láctea. En ella se pueden ver nebulosas oscuras, nubes de polvo interestelar, regiones de formación estelar, y parte de la nebulosa de reflección azul IC 4603 a la izquierda. La cabeza de Nefertiti, o un ángel negro, o lo que Ud. vea en la silueta, ofrece también vistas interesantes al rotar la imagen. Telescopio refractor TEC 140, cámara Sbig STF8300-AO/8, 7.5 horas acumuladas en LRGB, subframes de 12 minutos, desde mi observatorio casero en La Colonia, Illapel, Chile. Saludos y comentarios bienvenidos...
The great nebula in Orion captured on 1-29-2017 from the General Nathan Twinning Observatory (GNTO) in Belen, New Mexico using an AT65 apo refractor, an SBIG ST4000XCM camera and a Losmandy G11 mount. Exposures were:
15 x 10"
15 x 1'
12 x 10'
Subframes were combined and processed using Pixinsight. Final tweaks made using Photoshop CS2.
I've seen the "Heart of the Heart" a million times so I figured I'd join the crowd. Actually this was a test- I've never tried to bin subframes in any setting other than 2x2. This was shot at 4x4.
Since I was able to image 3 times this week(a 1st in almost 2 years) I chose something familiar for my "binning" test, IC 1805, the Heart Nebula in the constellation of Cassiopeia.
Shot on 9/25 & 9/26/14 with a Celestron 11" EdgeHD @ F/7 and a QHY23M
RGB-10 subs each color filter/ 2 minutes each, 1hour total,4x4 binning
Ha,OIII,SII-10 subs each filter/5 minutes each,2.5 hours total, 4x4 binning
Two symbols
© All rights reserved.
This image is copyrighted. Please do not use, or post to blogs and other sites without my permission.
Abell 1367
Leo Galaxy Cluster
The Leo Cluster (Abell 1367) is a galaxy cluster about 330 million light-years distant in the constellation Leo, with at least 70 major galaxies. The elliptical galaxy known as NGC 3842 is the brightest member of this cluster. This is seen to the left and slightly upward of the center of the image. Along with the Coma Cluster, the Leo cluster is one of the two major clusters comprising the Coma Supercluster, which in turn is part of the CfA2 Great Wall, an immense galaxy filament which is hundreds of millions of light years long and is one of the largest known structures in the universe. The “CfA” designation refers to “Center for Astrophysics” redshift survey and was an attempt to map the large scale structure of the universe. CfA2 was the second survey started in 1985 and the Great Wall was discovered in 1989
The Leo Cluster mostly contains spiral galaxies, suggesting that it is much younger than other comparable clusters, such as the Coma Cluster. It is also home to one of the universe's largest known black holes, which lies in the center of NGC 3842. The black hole is 9.7 billion times more massive than our sun. (Wikipedia)
Capture info:
Location: Orion’s Belt Remote Observatory, Mayhill NM
Telescope: Takahashi ED180
Mount: Paramount MX+
Camera: SBIG STXL 16200
Data: LRGB 2.5,2,2,2.5 hrs (5min subframes)
Processing: Pixinsight
I've photographed sections of the Cygnus Loop several times before but never had a telescope and camera that had a wide enough field to capture the loop in its entirety. The Dwarf III in mosaic mode finally gave me that capability.
I captured this image two ways to create three different iterations. First I took 200 subframes 15 seconds each using the Astro filter built into the Dwarf III. This is good for representing stars without bloat. It does not do a good job of revealing detail in nebulae. Next I took 200 subframes 30 seconds each using a Duo filter. This filter is good at revealing nebulae details, but tends to produce stars than are not terribly sharp.
I first tried combing the results of both filters, but I didn't particularly like the result. Neither did I like the result of the Astro filter. The Duo filter produced the most pleasing image to my eye, which is what is posted above.
NGC 2359 is a fairly faint and hard to get nebula (it is quite low from my location and only visible between trees and houses for a few hours each night and for a couple of months). It also goes by the less glamorous name of the 'Duck' nebula. This way round though it is easy to see how it has been nicknamed 'Thor's Helmet'.
This is a stack of twenty eight-minute subframes in Hydrogen Alpha, taken in one session tonight from almost the moment it cleared the trees to the very last point before it disappeared behind neighbouring houses.
Peter
Equipment: Atik 460EX mono CCD, 0.75 reducer, 130mm triplet APO, EQ8 mount.
A collage utilizing both H-alpha and CaK imaging of our Sun. Subframe positions is "artistic" and does not represent correct orientation compared to Sun - all images are however taken by me excluding the Apollo era (free) picture of Earth showing approximate scale. Pictures taken in southern Finland during summers of 2016 and 2017 as I haven't had time to image at all lately.
See www.flickr.com/photos/130947324@N08/46483974944/ for labels.
Recorded with BW ASI178mm camera, colors added in post production. H-alpha images colored to red and yellow and they are partially inverted to pop out surface details, protuberances and filaments. CaK is colored to blue to mimic imaging bandwidth for CaK.
H-alpha: 656.28 nm (deep red in reality) hydrogen line. Tunable wavelength. Exposure times around 2 ms.
CaK: About 8 nm wide bandpass at the Calcium II K-Line centered around 395 nm (ultraviolet). Exposure time of about 0.8 ms.
Prefilter: Baader D-ERF (with H-alpha), Baader AstroSolar film (with CaK)
Scope: TS Express 80/480 mm FPL53 APO
Filter: Daystar Quark or Baader CaK
Camera: ASI 178mm with 0.5x reducer
DIY Arduino based focuser motor control
Mount: Celestron AVX (equatorial mount), StarAdventurer
Software: FireCapture, SharpCap, Autostakkert!, ImPPG and Photoshop CC.
Typically stacked a best few percents of 5000 images to create each of the separate photos. Full disk H-alpha sun is a composite of several sub images. I roughly estimated that I collected about 180 000 frames and 775 GB of uncompressed AVI video as raw material. Final stacked image number should be close to 4000 in that composite.
As seen from an elevation of 4,000 feet at the top of Mary's Peak in Oregon. My Seestar S50 ran from 9:50PM till 4:30AM collecting 1,020 ten-second subframes. The night was moonless, clear and cold.
I've never photographed this galaxy before. I'm not sure what makes it the phantom galaxy, but maybe it had a role in a Star Wars movie.
Seestar S50
635 10-second subframes. Polar Alignment.
This is a stacked photograph showing M81, M82 and NGC3077 all in the constellation Ursa Major. Also present in M82 is supernova SN2014J. This is from collected data over the last 30+ days, 123 subframes of various exposure lengths and ISO settings, total image time 3 Hours and 17 Minutes. Images were all taken with a Canon T4i and 400mm Canon lens mounted on an iOptron ZEQ25GT mount, no telescope was used.
1997 Vauxhall Corsa 1.2 LS 3-door.
In present ownership since November 1999.
Tax expired on 26th October 2022 and the last MoT test expired on 10th November 2022.
It failed a test on 13th October 2022 -
Oil leaking continuously from engine posing a serious risk to road safety (8.4.1 (a) (ii)) - Dangerous
Offside front position lamp not working (4.2.1 (a) (ii)) - Major
Nearside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength inner wheel arch (5.3.6 (a) (i)) - Major
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 00.32 and 00.52 EDT
* Altitude of centre of frame at time of exposures: 44°, increasing to 47°
* Temperature 9° C.
* Total exposure time: 10 minutes
* 1253 mm focal length telescope
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Description:
The constellation Auriga is festooned with open star clusters, three of which (M36, M37 and M38) are listed in Charles Messier's catalogue of non-stellar objects, commonly known as the Messier List.
In the centre of this image is the bright and large cluster M38, which was discovered in 1654, lies about 3,480 light years from our solar system, and is estimated to be about 250 million years old. It is quite bright, at magnitude 7.4, and is a very pretty sight in even a small telescope.
Below M38, near the bottom edge of the frame and just a little right of centre, is the smaller cluster NGC 1907, which is further away (4,500 light years), fainter (magnitude 8.2) and older (~500 million years) than M82.
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@N06/52472161224
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Technical information:
Nikon D810A camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount
Ten 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, colour balance & saturation, sharpening)
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Manufacturer: Auto Union AG, Zwickau - Germany
Type: Meisterklasse F5-700 Cabrio-Limousine
Engine: 692cc 2 cylinder 2-stroke
Power: 30 bhp
Speed: 85 km/h
Production time: 1935 - 1936
Production outlet: 16,154
Curb weight: 840 kg
Special:
- The DKW F-Series (F= Frontantrieb / front-wheel drive) is divided into 5 classes: Reichsklasse, Meisterklasse, Front Zweisitzer, Front Luxus Cabriolet and Front Luxus Sport.
- A subframe (produced at the DKW-factory at Zwickau) was mounted on a central box frame, covered with artificial leather (produced at the AUDI-factory at Berlin-Spandau).
- Three speed gearbox.
Addet to the gallery www.flickr.com/photos/75141663@N05/galleries/721576331417...
Added to the gallery www.flickr.com/photos/stevepoe/galleries/72157637866264836
The very well known group of galaxies in Leo: M65 at bottom, M66 to the left and NGC 3628 with its tidal tail on the right.
This image is an integrated stack of 419 x 240s subframes captured with a William Optics Zenithstar 103 and QHY168C OSC camera. Imaging was controlled via Sequence Generator Pro and PHD2, all post-processing was carried out in PIxInsight.
Observed from Prachinburi, Thailand.
Esprit 150ED apo triplet and 1000D with UHC filter. Captured 3 subframes at 15 minutes each at ISO 1600,stacked and darkframe (4) calibrated in Deepskystacker and processed in Photoshop.
Image taken early hours of 6/11/16
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
* Altitude of M22 at time of exposures: 15°, decreasing to 14°
* Altitude of M13 at time of exposures: 37°, decreasing to 34°
Temperature 13° C.
* Total exposure time: 6 minutes for M22
* Total exposure time: 7 minutes for M13
* 1200 mm focal length telescope
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Description:
These are two of the largest and brightest globular star clusters visible from the northern hemisphere. M22 in the constellation Sagittarius is brighter and larger than M13 in Hercules, at least as seen from our solar system (it is actually smaller than M13, but M13 is almost 2.5 times as far away from us and has four times as many stars as M22). But because M22 is so far south in the sky, and is in an area that is strewn with other magnificent clusters and bright nebulae, it does not receive nearly the attention that the more northerly, but smaller and fainter, M13 does.
Globular star clusters are dense mainly spherical agglomerations of stars that are gravitationally bound together. They are found in the halos of the galaxies in which they are located, and are among the most ancient structures in the 13.8-billion-year-old universe.
In this view these two star clusters are shown to exactly the same scale. The subframes comprising each of the final images were made on the same evening, within an hour of each other.
Because M22 was extremely low in the sky when I captured the exposures that make up this image, atmospheric turbulence made the stars images move around a lot and turned the stars into small blobs rather than the more pinpoint star images in M13, which was much higher is the sky.
About M22, from Wikipedia:
"Messier 22 ... is an elliptical globular cluster in the constellation Sagittarius, near the Galactic bulge region. It is one of the brightest globulars that is visible in the night sky.
M22 was one of the first globulars to be discovered, on August 26, 1665 by Abraham Ihle and it was included in Charles Messier's catalog of comet-like objects on June 5, 1764. It was one of the first globular clusters to be carefully studied first by Harlow Shapley in 1930. He discovered roughly 70,000 stars and found it had a dense core.
M22 is one of the nearer globular clusters to Earth at a distance of about 10,600 light-years away. It spans ... 99 ± 9 light-years [in diameter]. 32 variable stars have been recorded in M22.
Despite its relative proximity to us, this metal-poor cluster's light is limited by dust extinction, giving it an apparent magnitude of 5.5 making it the brightest globular cluster visible from mid-northern latitudes ... However, due to its southerly declination, M22 never rises high in the sky and so appears less impressive to northern hemisphere observers than other summer sky globulars such as M13 and M5.."
About M13, from Wikipedia:
Messier 13 ..., sometimes called the Great Globular Cluster in Hercules ..., is a globular cluster of about 300,000 stars in the constellation of Hercules. ... M13 was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.
M13 is about 145 light-years in diameter, and ... is 25,100 light-years away from Earth.
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Nikon D810a camera body on Explore Scientific 152 mm (6") apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount with a Kirk Enterprises ball head
Multiple stacked subframes; each frame:
ISO 3200 for M22, and ISO 2500 for M13; 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, sharpening)
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Description: This is my image of the Andromeda Galaxy M31 based on about 15 hours of total exposure time. The angular size of M31 is a huge 178x63 arcminutes which occupies a significant portion of the APS-C sensor of my camera. Since there are also numerous background stars, finding a relatively star-free area to do a Background Neutralization is a bit of a challenge. I also found achieving a proper color balance to be another challenge. Various sources indicate the presence of an outer bluish halo encompassing the core. I tried to achieve my objective by applying a series of Curves Transformations while protecting the background with a mask. As a side note, while numerous stars are present, I decided against applying a Morphological Transformation to reduce their brightness because in doing so I detected an undesirable ringing effect. One possible solution is to apply Multiscale Linear Transform with deringing selected. However, I have not tested that option.
Date / Location: 21-23 September and 8-10 October 2022 / Washington D.C.
Equipment:
Scope: WO Zenith Star 81mm f/6.9 with WO 6AIII Flattener/Focal Reducer x0.8
OSC Camera: ZWO ASI 2600 MC Pro at 100 Gain
Mount: iOptron GEM28-EC
Guide Scope: WO 50mm Uniguide Scope
Guide Camera: ZWO ASI 290mm
Focuser: ZWO EAF
Light Pollution Filter: Chroma LoGlow Broadband
Processing Software: Pixinsight
Processing Steps:
Preprocessing: I preprocessed 184x300s subs (= 15.3 hours) in Pixinsight to get an integrated image using the following steps: Image Calibration > Cosmetic Correction > Subframe Selector > Debayer > Select Reference Star and Star Align > Image Integration.
Linear Postprocessing: Rotation > Dynamic Crop > Dynamic Background Extractor (subtraction to remove light pollution gradients and division for flat field corrections) > Background Neutralization > Color Calibration > Noise Xterminator.
Nonlinear Postprocessing: First Histogram Transformation > Second Histogram Transformation > First Local Histogram Equalization > Second Local Histogram Equalization First Curves Transformation > Second Curves Transformation > Third Curves Transformation > SCNR Noise Reduction.
IC434 in Orion constellation . Taken from my backyard at Tiny Twp. Canada with Askar 185APO refractor and ASI533MC OSC camera . Poor data from one session stack of 30 subs 120 sec each . No H@ added yet . Thanks for looking .I hope next year I'll collect more subframes data. Thanks for looking .
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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:
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 right side.
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@N06/27443670463
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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:
140 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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British Museum, London. British Museum, London. 3 of 4 in my first series shot as such..."Pillar To Past"
A shock find on streetview. While prepping for a spotting trip, I thought I'd have a look in a random newbuild estate, just because the streetview had been done pretty recently. To my surprise, this pre-facelift Ulysse was sitting, so I went to go and see it the next day.
Long term ownership and off the road since last year, after failing it's MOT on the dreaded Front Subframe. I'd say it's the end of the road for this rare MPV, but kudos to the owners for keeping it about.
P797 FJA
1978 Lancia Beta 1600 coupe.
Last MoT test expired in September 2008 (SORN, now MoT exempt).
It failed a test spectacularly in September 2019 -
Stop lamp(s) all not working (4.3.1 (a) (iii)) - Dangerous
Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) - Dangerous
Offside headlamp not working on dipped beam (4.1.1 (a) (ii)) - Major
Offside front direction indicator not working (4.4.1 (a) (ii)) - Major
Offside front position lamp adversely affected by the operation of another lamp affected when indicator switched on (4.2.3 (c)) - Major
Horn not working (7.7 (a) (ii)) - Major
Nearside rear position lamp not working (4.2.1 (a) (ii)) - Major
Offside rear position lamp adversely affected by the operation of another lamp affected by the indicator (4.2.3 (c)) - Major
Nearside rear direction indicator light intensity significantly reduced (4.4.3 (a)) - Major
Offside rear direction indicator light intensity significantly reduced (4.4.3 (a)) - Major
Windscreen wiper not working (3.4 (a)) - Major
Windscreen washer not working (3.5 (a)) - Major
Nearside steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) - Major
Offside steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) - Major
Offside front integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced inner sill (6.1.1 (c) (i)) - Major
Offside front integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced floor pan not attached to sill (6.1.1 (c) (i)) - Major
Offside rear integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced inner sill (6.1.1 (c) (i)) - Major
Nearside front integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced inner sill (6.1.1 (c) (i)) - Major
Nearside rear integral body structure corroded to the extent that the rigidity of the assembly is significantly reduced inner sill (6.1.1 (c) (i)) - Major
Offside front suspension component mounting prescribed area excessively corroded significantly reducing structural strength forward subframe mounting in front cross member (5.3.6 (a) (i)) - Major
Offside front suspension component mounting prescribed area excessively corroded significantly reducing structural strength rearward subframe mounting (5.3.6 (a) (i)) - Major
Front registration plate missing (0.1 (a)) - Major
Nearside front upper suspension component mounting prescribed area excessively corroded significantly reducing structural strength shock mount (5.3.6 (a) (i)) - Major
Offside front upper suspension component mounting prescribed area excessively damaged significantly reducing structural strength shock mount (5.3.6 (a) (i)) - Major
Nearside front service brake excessively binding (1.2.1 (f)) - Major
Emissions not tested due to overheating (8.2.1.2 (d)) - Major
With a nice SEAT Ibiza parked behind and that Carina E estate again.
This spectral shadowy figure is in fact the Cone Nebula that sits atop the Christmas tree nebula when viewed upside down. It looks more like a figure peering at the stars in the distance than a dark region where new stars have cleared pathways as they form.
This is a stack of ten ten-minute subframes in H Alpha.
Peter
1998 BMW 318is coupe.
Supplied by Stephen James (BMW).
Scrapped on 17th September 2022 (last MoT test expired on 15th September 2022).
It failed a test on 30th August 2022 -
Nearside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
Windscreen washer provides insufficient washer liquid (3.5 (a)) - Major
Offside rear subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) - Major
For those who have met Nic and seen his previous 240 in person, you'll know that it was way different from all of the other cars out there in the scene today. It wasn't perfect but there was just something totally raw about it that everyone loved. Not to mention the fact that he was extremely low...and static. His new 240 coupe isnt any different. It still had the same raw feel that most cars fail to have. As I sat in the passenger seat, you could feel and hear the scraping of his subframe as we cruised around town looking for a shooting spot. As the car scraped we both would gasp from the harsh metal sound but at the same time couldn't help but to laugh at how crazy it was. It was just a fun car to be in. Nic himself is an awesome kid and I believe everyone should get a chance to meet him. He is on a whole other level and we definitely need more kids like him around the "scene".
For this shoot, I decided to try out something different. Instead of just shooting a car rigged up or parked in front of something cool with blasts of strobes, I wanted to include the driver and his local town to create a "real image" and tell a story. I used only natural lighting to get a "real" feel to it.
Nic sparking it up: www.youtube.com/watch?v=fUw4zJjg8fQ
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I'VE FINALLY GOTTEN AROUND TO PROCESSING THIS IMAGE!
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Photographed 40 km south of Alice Springs, Northern Territory, Australia, between 04.27 and 04.35 CAST (Central Australia Standard Time)
* Observing site: Long. 133.69° E. | Lat. 23.98° S. | Elev. 612m
* Altitude of centre of frame at time of exposures: ~21°
* Total exposure time: 7 minutes
* 200 mm focal length lens
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Description:
NOTE: This is a wider angle view of much higher magnification image of the Eta Carina Nebula made with a 660 mm focal length telescope 8 nights earlier near Uluru-Kata Tjuta National Park (Ayers Rock), which you can see here:
www.flickr.com/photos/97587627@N06/49141569982
One of the most intriguing hydrogen gas clouds in the entire sky is this giant object in the far southern constellation Carina (the Keel). This nebula and the associated star clusters are located only 13 degrees from the centre of the Southern Cross, which is the well-known star pattern in the constellation Crux (the Cross).
The hydrogen gas in this nebula is excited into an ionized state by the nearby star Eta Carinae, which lies at a distance of 7,500 light years from our solar system. Eta Carinae is one of the most massive, luminous stars known, with a brightness more than 5 million times that of our own Sun.
Eta is a cataclysmic variable star, which has brightened and faded remarkably over the last two centuries. In 1843 Eta briefly became the second brightest star of the sky, before fading well below naked eye visibility after 1856. In recent decades Eta has brightened noticeably, so that now it can be seen easily from a moderately dark sky location, at magnitude 4.2. For more information about this star, click here:
en.wikipedia.org/wiki/Eta_Carinae
This nebula is a nursery of new star formation, which accounts for the many embedded open clusters of stars that are shown in this image. One of them (Trumpler 14), which is the small cluster just slightly to right of and above centre in this view, is extremely young; only half a million years old. It contains about 2,000 stars, and is ~6 light years in diameter.
Apart from the prominent nebula, this region of the Milky Way is strewn with open star clusters that are cosmologically very young, and typically consist of bluish (hot) stars.
For a version of this image with labels and showing constellation boundaries, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/54779207955
Here is a photo of the gear that used for astrophotography on this trip:
www.flickr.com/photos/97587627@N06/49017804808
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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 iOptron CEM40 equatorial mount
Seven stacked frames; each frame:
200 mm focal length
ISO 5000; 1 minute exposure at f/4.5; unguided
Subframes registered in RegiStar;
Stacked and processed in Photoshop CS6 (brightness, contrast, levels, colour balance, colour desaturation)
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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: 12 minutes.
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@N06/28023003682
Here is a photo of the equipment used to make these astrophotos:
www.flickr.com/photos/97587627@N06/27777670520
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Description:
High overhead in the northern hemisphere summer sky the Milky Way - our home galaxy - displays many clouds of red hydrogen gas and numerous star clusters.
An especially rich area surrounds the star Sadr - also known as Gamma Cygni - in the constellation Cygnus (the Swan).
The star Deneb: At the left edge of the frame is brilliant Deneb, the 19th brightest star in the sky. Deneb is so enormous that, if we were to view it from Earth's distance to our Sun, Deneb would stretch 60° across the sky! Deneb is also one of the most intrinsically luminous stars known; its light output is 200,000 times that of our Sun. It is also very far away; current estimates are about 2,500 light years; this compares with a few light years to a few dozen light years for most of the other bright stars that we can see in our sky.
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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
Twelve stacked frames; each frame:
200 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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It's got da stance. Had to replace the rear axle with bendy hose and remove the rear subframe to do it, but I figure that leaves this with as much structural integrity as a real stanced car.
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 23.30 and 23.50 EDT
* Total exposure time: 10 minutes
* 660 mm focal length telescope
* Field of view: ~2.8° wide x 1.7° high
* Altitude of galaxy at time of exposures: 22.5°, declining to 20.4°
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Description:
This was my first attempt at photographing this magnitude 8.8 galaxy, which is famous in the history of astronomy, as you will see from reading the description below:
From Wikipedia:
"NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard in 1884, with a six-inch refractor telescope. It is the closest non-satellite galaxy to the Milky Way, but lies just outside its virial radius. It is similar in structure and composition to the Small Magellanic Cloud. It is about 7,000 light-years in diameter.
Edwin Hubble, in the paper N.G.C. 6822, A Remote Stellar System, identified 15 variable stars (11 of which were Cepheids) of this galaxy. ... Hubble's detection of eleven Cepheid variable stars was a milestone in astronomy. Utilizing the Cepheid Period-Luminosity relationship, Hubble determined a distance of 214 kiloparsecs or 698,000 light-years. This was the first system beyond the Magellanic Clouds to have its distance determined. (Hubble continued this process with the Andromeda Galaxy and the Triangulum Galaxy). This distance to the galaxy was way beyond Harlow Shapley's value of 300,000 light-years for the size of the universe. In the paper, Hubble concluded the "Great Debate" of 1920 between Heber Curtis and Shapley over the scale of the universe and the nature of the "spiral nebula". It soon became evident that all spiral nebulae were in fact spiral galaxies far outside our own Milky Way."
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Technical information:
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic refracting telescope, mounted on a Sky-Watcher EQ6-R PRO SynScan mount
Ten stacked subframes - each frame:
660 mm focal length
ISO 3200; 1 minute exposure at f/5.2, unguided, with long exposure noise reduction
Stacked in RegiStar 1.0.10
Processed in Photoshop CS6 (brightness, contrast, colour balance)
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Manufacturer: Carossiers Hermann Graber, Whichtrack (near Bern) - Switzerland
Type: W153 Graber Kabriolett
Engine: 2289cc straight-6
Power: 55 bhp / 3600 rpm
Speed: 116 km/h
Production time: 1939
Production outlet: 1 (one)
Curb weight: 1350 kg
Special:
- This two door, four seat convertible is special made on a MB W153 rolling chassis with a x-shaped oval tube subframe.
- Graber always called his convertibles "Kabriolett".
- The straight-6 had two twin chamber Solex 30 JFFK carburettors and a four speed manual transmission.
- Graber was very famous at that time. They also built convertibles for Bugatti, Rolls-Royce, Bentley and even for Duesenberg.
- Bodywork Builder Park Ward (England) built Graber bodies under license.
This is the current state of an ongoing experiment comparing the use of an uncooled colour planetary camera against a deep sky colour camera. Both have CMOS sensors. The deep sky images are on the same scale as the planetary camera image but I have cropped their area down by about half.
Progress so far suggests that on the right settings the planetary camera can produce a nice close-up of the Ring nebula that with longer total exposure times and the right individual subframe times could be as (or even more) detailed than the wider field views with the cooled deep sky camera.
Peter