Submissions: 2013 April
Submissions: 2013 April
__________________________________________________________________________________________________
Please post your images here.
Please see this thread before posting images; posting images demonstrates your agreement with
the possible uses for your image.
Please keep images under 400K, whether hotlinked or uploaded.
Thank you!
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<- Previous submissions
[c]«« Discuss Anything in Astronomy «» Visit The Asterisk Main Page «» See Introductory Astonomy Lectures »»
[hr][/hr]«« Introduce Yourself «» Please Read the Rules »»[/b][/c]
Please post your images here.
Please see this thread before posting images; posting images demonstrates your agreement with
the possible uses for your image.
Please keep images under 400K, whether hotlinked or uploaded.
Thank you!
_________________________________________________________________________________________________
<- Previous submissions
[c]«« Discuss Anything in Astronomy «» Visit The Asterisk Main Page «» See Introductory Astonomy Lectures »»
[hr][/hr]«« Introduce Yourself «» Please Read the Rules »»[/b][/c]
A closed mouth gathers no foot.
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- Posts: 97
- Joined: Sat Jul 17, 2010 4:38 am
Re: Submissions: 2013 April
Pinwheel Galaxy M101 with H-Alpha
Copyright: Terry Hancock
http://www.flickr.com/photos/terryhanco ... hotostream
Copyright: Terry Hancock
http://www.flickr.com/photos/terryhanco ... hotostream
Re: Submissions: 2013 April
M78 and NGC 2017 in Orion
Copyright: Gerhard Bachmayer
http://www.pbase.com/gbachmayer/image/1 ... 3/original
Copyright: Gerhard Bachmayer
http://www.pbase.com/gbachmayer/image/1 ... 3/original
Re: Submissions: 2013 April
NGC 1491 (LBN 704, LBN 706, Sh 2-206) - Emission nebula and HII region in Perseus
http://www.elateobservatory.com
http://www.irida-observatory.org
Copyright: Velimir Popov
NGC 1491 (also designated SH2-206 and LBN 704) is a bright emission nebula and HII region, located on the edge of a vast cloud region of neutral gas, about 10 700 light-years. The entire nebula is quite irregular. The major source of ionizing radiation is the blue star BD +50 886, which has been classified either as O5V star (Crampton, D., Fisher, W.A. 1974 Publ. Dominion Astrophys. Obs. Victoria Vol. 14, No. 12, p. 296-297) or as O4 star (Hunter, D.A., Massey, P. 1990, Astronomical Journal (ISSN 0004-6256), vol. 99, March 1990) The ionizing star is located about 1' to the east of the brightest emission. The blue star is illuminating the nebula while its strong stellar wind is “blowing” a bubble in the gas that immediately surrounds it.
Higher resolution and more information is avaliable here ...
Thank you for looking ...
http://www.elateobservatory.com
http://www.irida-observatory.org
Copyright: Velimir Popov
NGC 1491 (also designated SH2-206 and LBN 704) is a bright emission nebula and HII region, located on the edge of a vast cloud region of neutral gas, about 10 700 light-years. The entire nebula is quite irregular. The major source of ionizing radiation is the blue star BD +50 886, which has been classified either as O5V star (Crampton, D., Fisher, W.A. 1974 Publ. Dominion Astrophys. Obs. Victoria Vol. 14, No. 12, p. 296-297) or as O4 star (Hunter, D.A., Massey, P. 1990, Astronomical Journal (ISSN 0004-6256), vol. 99, March 1990) The ionizing star is located about 1' to the east of the brightest emission. The blue star is illuminating the nebula while its strong stellar wind is “blowing” a bubble in the gas that immediately surrounds it.
Higher resolution and more information is avaliable here ...
Thank you for looking ...
Last edited by ViliMax on Mon Apr 01, 2013 6:18 pm, edited 2 times in total.
Re: Submissions: 2013 April
C/2011 L4 Panstarrs & M31 from K31 observatory (BELLLINO)
http://cdn.astrobin.com/images/ea4236e6 ... 204e97.jpg
direct link: http://www.astrobin.com/37594/
Roberto Barcellona
Associazione Astrofili Bisalta
Osservario Astronomico di Bellino (CN) - Observatory code: K31
http://cdn.astrobin.com/images/ea4236e6 ... 204e97.jpg
direct link: http://www.astrobin.com/37594/
Roberto Barcellona
Associazione Astrofili Bisalta
Osservario Astronomico di Bellino (CN) - Observatory code: K31
Last edited by bystander on Mon Apr 01, 2013 4:51 pm, edited 1 time in total.
Reason: please, no hot links to images > 400kb (file size)
Reason: please, no hot links to images > 400kb (file size)
Re: Submissions: 2013 April
Astrophotographer
Copyright: Adam Moncrieff
www.amoncrieff.ca This image shows an astrophotographer preparing for a night of imaging. As twilight almost disappears on the left side of the image a faint purple light can be seen on the right from an aurora. The winter Milky Way streaks down the center of the image with comet PanSTARRS and m31 to the left just above the horizon.
Thanks
Copyright: Adam Moncrieff
www.amoncrieff.ca This image shows an astrophotographer preparing for a night of imaging. As twilight almost disappears on the left side of the image a faint purple light can be seen on the right from an aurora. The winter Milky Way streaks down the center of the image with comet PanSTARRS and m31 to the left just above the horizon.
Thanks
Re: Submissions: 2013 April
Pleiades and Hyades
Copyright: Patrick Richter and Marcus Degenkolbe
[attachment=0]widefield_plehy_nasa_big.jpg[/attachment]
NGC 5139 Omega Centauri
Copyright: Joaquin Polleri & Ezequiel Etcheverry Observatorio Panameño en San Pedro de Atacama (OPSPA)
[attachment=1]Omega-Centauri-Joaquin-1.jpg[/attachment]
NGC 3344
http://skycenter.arizona.edu
http://caelumobservatory.com/
Copyright: Adam Block
[attachment=2]n3344s.jpg[/attachment]
ISS Image Frontier - making the invisible visible
Copyright: Christoph Malin and Dr. Don Pettit
Curiosity Sol 223 with elevated Drill bit and Mt Sharp
http://www.kenkremer.com
Copyright: NASA/JPL-Caltech/ Marco Di Lorenzo/Kenneth Kremer
[attachment=4]Curiosity Sol 223_5n_Ken Kremer_APOD.jpg[/attachment]
Star Birth in Cepheus
http://www.noao.edu/news/2013/pr1303.php
Copyright: T.A. Rector (University of Alaska Anchorage), T. Allen (University of Toledo) and WIYN/NOAO/AURA/NSF
http://asterisk.apod.com/viewtopic.php?t=31094
[attachment=3]cep_ob3-500.jpg[/attachment]
Copyright: Patrick Richter and Marcus Degenkolbe
[attachment=0]widefield_plehy_nasa_big.jpg[/attachment]
NGC 5139 Omega Centauri
Copyright: Joaquin Polleri & Ezequiel Etcheverry Observatorio Panameño en San Pedro de Atacama (OPSPA)
[attachment=1]Omega-Centauri-Joaquin-1.jpg[/attachment]
NGC 3344
http://skycenter.arizona.edu
http://caelumobservatory.com/
Copyright: Adam Block
[attachment=2]n3344s.jpg[/attachment]
ISS Image Frontier - making the invisible visible
Copyright: Christoph Malin and Dr. Don Pettit
Curiosity Sol 223 with elevated Drill bit and Mt Sharp
http://www.kenkremer.com
Copyright: NASA/JPL-Caltech/ Marco Di Lorenzo/Kenneth Kremer
[attachment=4]Curiosity Sol 223_5n_Ken Kremer_APOD.jpg[/attachment]
Star Birth in Cepheus
http://www.noao.edu/news/2013/pr1303.php
Copyright: T.A. Rector (University of Alaska Anchorage), T. Allen (University of Toledo) and WIYN/NOAO/AURA/NSF
http://asterisk.apod.com/viewtopic.php?t=31094
[attachment=3]cep_ob3-500.jpg[/attachment]
Re: Submissions: 2013 April
Saharan Dust Over Cyprus And Sunspots
© Thodoris Tzalavras
The first of April was a pretty weird day in Cyprus, weather wise…
Bursts of dust from the Sahara desert are no strangers to our little island, but still…
Today the atmosphere was so saturated by the Saharan dust that I was able to shoot the Sun with my C8+ telescope *without* a solar filter!!!
I even captured a sunspot on the upper left part of the Sun!
© Thodoris Tzalavras
The first of April was a pretty weird day in Cyprus, weather wise…
Bursts of dust from the Sahara desert are no strangers to our little island, but still…
Today the atmosphere was so saturated by the Saharan dust that I was able to shoot the Sun with my C8+ telescope *without* a solar filter!!!
I even captured a sunspot on the upper left part of the Sun!
Re: Submissions: 2013 April
Corona explosion
Copyright: Thomas Kast
http://www.facebook.com/salamapaja
Auroras danced in the sky from North to South and once they were directly above, the corona opened up and sent colorful rays in all directions. This magic moment lasts usually only a few moments. The Northern lights were a result of a fast-moving CME hitting Earths magnetic field.
Copyright: Thomas Kast
http://www.facebook.com/salamapaja
Auroras danced in the sky from North to South and once they were directly above, the corona opened up and sent colorful rays in all directions. This magic moment lasts usually only a few moments. The Northern lights were a result of a fast-moving CME hitting Earths magnetic field.
Re: Submissions: 2013 April
Observation of PANSTARRS comet with galaxy m31 at "Mont Saint Michel de Braspart" chapel, Brittany, France
Alexandre Croisier
Alexandre Croisier
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- Posts: 135
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- Location: Perth, Western Australia
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Recent, rising full Moon - Perth, Western Australia
A couple of days ago during full-moon I took some nice pictures of the rising Moon over Perth CBD. One looks specially great (see attached photo) as it shows the just rising Moon between the BankWest and BHP towers.
Higher res. @
http://westcoastpics23.blogspot.com.au/
Higher res. @
http://westcoastpics23.blogspot.com.au/
Re: Submissions: 2013 April
Road to Rainbow Galaxy
This image was shot in one of my favorite 'dark sky' locations at Cape Palliser on the bottom of the North Island of New Zealand. This panorama covers almost 360 degrees horizontally, and is made up of 28 individual shots, giving an overall image size of over 275 megapixels. The photo shows the Milky Way high in the sky stretching from east to west. The Large and Small Magellanic Clouds can be seen below the arch of the Milky Way. These two objects are irregular dwarf galaxies and are only visible from the southern hemisphere. The light below the Milky Way to the left is the Cape Palliser Lighthouse, and the small glow on the horizon to the right is the Queen Mary 2 Cruise Ship en-route for Wellington, New Zealand.
The full 275 megapixel version of this image can be seen here: http://gigapan.com/gigapans/126838
Website: http://markg.com.au
Copyright: Mark Gee
This image was shot in one of my favorite 'dark sky' locations at Cape Palliser on the bottom of the North Island of New Zealand. This panorama covers almost 360 degrees horizontally, and is made up of 28 individual shots, giving an overall image size of over 275 megapixels. The photo shows the Milky Way high in the sky stretching from east to west. The Large and Small Magellanic Clouds can be seen below the arch of the Milky Way. These two objects are irregular dwarf galaxies and are only visible from the southern hemisphere. The light below the Milky Way to the left is the Cape Palliser Lighthouse, and the small glow on the horizon to the right is the Queen Mary 2 Cruise Ship en-route for Wellington, New Zealand.
The full 275 megapixel version of this image can be seen here: http://gigapan.com/gigapans/126838
Website: http://markg.com.au
Copyright: Mark Gee
Re: Submissions: 2013 April
hello a big sunspot today !
image with C.14 + daystar 0.5 A filter lended by HDRsoft.
process with tone mapping under photomatix pro 4.2
regards
image © Philippe TOSI
image with C.14 + daystar 0.5 A filter lended by HDRsoft.
process with tone mapping under photomatix pro 4.2
regards
image © Philippe TOSI
Last edited by philto on Thu Apr 04, 2013 7:14 am, edited 2 times in total.
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- Posts: 135
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- Location: Perth, Western Australia
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Eta Carina, 2013 April 02
Eta Carinae Nebula
Cam: D60a
Mount: CPC925
Lens: ED80CTF with TeleView 0.8-reducer
Higher res. @
http://westcoastpics23.blogspot.com.au/
Cam: D60a
Mount: CPC925
Lens: ED80CTF with TeleView 0.8-reducer
Higher res. @
http://westcoastpics23.blogspot.com.au/
- NoelC
- Creepy Spock
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Re: Submissions: 2013 April
The Monkey Head Nebula in Orion. Made up of NGC 2174, NGC 2175, and some others. North is down in this image.
This full color composite was created from Infrared, Red, and Blue plates on file in the STScI Digitized Sky Survey online database.
The Monkey Head Nebula in Orion
A high resolution 13 megapixel image, which can be considered for publication as APOD, can be found here: High Resolution Image
-Noel
* If selected for APOD, the copyright/credit line should read the same as other DSS/POSS2 imagery, e.g., as shown on these APODs: Witch Head Nebula, M13
This full color composite was created from Infrared, Red, and Blue plates on file in the STScI Digitized Sky Survey online database.
The Monkey Head Nebula in Orion
A high resolution 13 megapixel image, which can be considered for publication as APOD, can be found here: High Resolution Image
-Noel
* If selected for APOD, the copyright/credit line should read the same as other DSS/POSS2 imagery, e.g., as shown on these APODs: Witch Head Nebula, M13
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- AKA: Sebastian Colombo
- Location: Buenos Aires, Argentina
- Contact:
Structures in Eta Carina
This sector of the nebula is not very prominent in photos, but is extensive in dark structures and hydrogen very showy and not very photographed.
200/1000
DSRL 450 refrigerated at 2 ° C
NEQ6 pro.
I hope you like.
More resolution http://www.astrofotografiadelcielosur.blogspot.com
Copyright: Sebastián Colombo BS. As. Argentina.
200/1000
DSRL 450 refrigerated at 2 ° C
NEQ6 pro.
I hope you like.
More resolution http://www.astrofotografiadelcielosur.blogspot.com
Copyright: Sebastián Colombo BS. As. Argentina.
Last edited by sebyta on Thu Apr 04, 2013 1:23 pm, edited 1 time in total.
Re: Submissions: 2013 April
Used Parachute on Mars Flaps in the Wind
http://www.jpl.nasa.gov/news/news.php?release=2013-121
Copyright: NASA/JPL-Caltech/Univ. of Arizona
http://asterisk.apod.com/viewtopic.php?t=31110 Zodiacal Light
http://www.flickr.com/photos/93826649@N04/
Copyright: Christophe Marlot
[attachment=1]marlot.jpg[/attachment]
NGC 602
http://www.chandra.harvard.edu/photo/2013/ngc602/
Copyright: X-ray: NASA/CXC/Univ.Potsdam/L.Oskinova et al; Optical: NASA/STScI; Infrared: NASA/JPL-Caltech
http://asterisk.apod.com/viewtopic.php?t=31113
[attachment=0]ngc602_525_labeled.jpg[/attachment]
Nevada's Lake Tahoe Winter Night Sky
http://www.AstroPics.com
Copyright: Wally Pacholka
[attachment=2]LakeTahoe Winter Sky Pano -450wp.jpg[/attachment]
IC 1396
http://www.atlasastronomia.com/
Copyright: Cesar Blanco
[attachment=3]IC 1396_HaSHO_1000.jpg[/attachment]
Galaxy Spiral Arm Formation
http://www.news.wisc.edu/21636
Copyright: Simulation: Elena D'Onghia and Mark Vogelsberger, Harvard FAS Supercomputer Odyssey; Visualization: Thiago ize, Scientific Computing and Imaging (SCI) Institute - University of Utah
http://asterisk.apod.com/viewtopic.php?t=31099
http://www.jpl.nasa.gov/news/news.php?release=2013-121
Copyright: NASA/JPL-Caltech/Univ. of Arizona
http://asterisk.apod.com/viewtopic.php?t=31110 Zodiacal Light
http://www.flickr.com/photos/93826649@N04/
Copyright: Christophe Marlot
[attachment=1]marlot.jpg[/attachment]
NGC 602
http://www.chandra.harvard.edu/photo/2013/ngc602/
Copyright: X-ray: NASA/CXC/Univ.Potsdam/L.Oskinova et al; Optical: NASA/STScI; Infrared: NASA/JPL-Caltech
http://asterisk.apod.com/viewtopic.php?t=31113
[attachment=0]ngc602_525_labeled.jpg[/attachment]
Nevada's Lake Tahoe Winter Night Sky
http://www.AstroPics.com
Copyright: Wally Pacholka
[attachment=2]LakeTahoe Winter Sky Pano -450wp.jpg[/attachment]
IC 1396
http://www.atlasastronomia.com/
Copyright: Cesar Blanco
[attachment=3]IC 1396_HaSHO_1000.jpg[/attachment]
Galaxy Spiral Arm Formation
http://www.news.wisc.edu/21636
Copyright: Simulation: Elena D'Onghia and Mark Vogelsberger, Harvard FAS Supercomputer Odyssey; Visualization: Thiago ize, Scientific Computing and Imaging (SCI) Institute - University of Utah
http://asterisk.apod.com/viewtopic.php?t=31099
Click to play embedded YouTube video.
- astrogades
- Ensign
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- Location: Cádiz, Spain ( Europe )
- Contact:
Comet C/2011 L4 (PANSTARRS)
The lighthouse guiding light of comet C/2011 L4 (PANSTARRS). View of the city of western world's oldest (3,000 years old) Cadiz, Southern Spain. But safer than the comet is older than the city founded by the Phoenicians and later Roman domain. Now the domain is the universe and its wonders.
Authors Photo: Jesus Manuel Vargas and Maritxu Poyal held on March 14, 2013, Canon EOS 350 D tripod. 5 second exposures for panning. Canon Telephoto 75-300 mm diaphragm 5.6.
http://sky-astrophotography.com/index.p ... ure&id=990
http://sky-astrophotography.com/
Authors Photo: Jesus Manuel Vargas and Maritxu Poyal held on March 14, 2013, Canon EOS 350 D tripod. 5 second exposures for panning. Canon Telephoto 75-300 mm diaphragm 5.6.
http://sky-astrophotography.com/index.p ... ure&id=990
http://sky-astrophotography.com/
Re: Submissions: 2013 April
NGC 6217
NGC 6217 is a Barred Spiral Galaxy in the constellation Ursa Minor and lies 60 million light-years away.
Hubble Legacy Archive Data set:
hlsp_sm4ero_hst_acs_11371-ngc6217_f435w_v1_drz_drz (Blue)
hlsp_sm4ero_hst_acs_11371-ngc6217_f625w_v1_drz_drz (Green)
hlsp_sm4ero_hst_acs_11371-ngc6217_f658n_v1_drz_drz (Blended with Red Channel)
hlsp_sm4ero_hst_acs_11371-ngc6217_f814w_v1_drz_drz (Red)
Higher resolution
NGC 6217 is a Barred Spiral Galaxy in the constellation Ursa Minor and lies 60 million light-years away.
Hubble Legacy Archive Data set:
hlsp_sm4ero_hst_acs_11371-ngc6217_f435w_v1_drz_drz (Blue)
hlsp_sm4ero_hst_acs_11371-ngc6217_f625w_v1_drz_drz (Green)
hlsp_sm4ero_hst_acs_11371-ngc6217_f658n_v1_drz_drz (Blended with Red Channel)
hlsp_sm4ero_hst_acs_11371-ngc6217_f814w_v1_drz_drz (Red)
Higher resolution
Re: Submissions: 2013 April
The Southern Cross over Caloundra, Queensland, Australia as a satellite flashes by.
Re: Submissions: 2013 April
OGLE and the Magellanic clouds
http://www.lco.cl
Copyright: Yuri Beletsky, Las Campanas Observatory, Carnegie Institution for Science
[attachment=2]OGLE.jpg[/attachment]
Iris Nebula
Copyright: Aurélien Lepanot
[attachment=1]iris.jpg[/attachment]
Io Volcanoes
http://www.nasa.gov/topics/solarsystem/ ... laced.html
Copyright: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
http://asterisk.apod.com/viewtopic.php?t=31120 Gravity-Bending Find Leads to Kepler Meeting Einstein
http://www.jpl.nasa.gov/news/news.php?release=2013-124
Copyright: NASA/JPL-Caltech
http://asterisk.apod.com/viewtopic.php?t=31117 M57
http://billsnyderastrophotography.com/
Copyright: Bill Snyder
[attachment=0]M57.jpg[/attachment]
Horsehead Nebula
http://www.flickr.com/photos/31986095@N05/
Copyright: Erik Larsen
http://www.lco.cl
Copyright: Yuri Beletsky, Las Campanas Observatory, Carnegie Institution for Science
[attachment=2]OGLE.jpg[/attachment]
Iris Nebula
Copyright: Aurélien Lepanot
[attachment=1]iris.jpg[/attachment]
Io Volcanoes
http://www.nasa.gov/topics/solarsystem/ ... laced.html
Copyright: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
http://asterisk.apod.com/viewtopic.php?t=31120 Gravity-Bending Find Leads to Kepler Meeting Einstein
http://www.jpl.nasa.gov/news/news.php?release=2013-124
Copyright: NASA/JPL-Caltech
http://asterisk.apod.com/viewtopic.php?t=31117 M57
http://billsnyderastrophotography.com/
Copyright: Bill Snyder
[attachment=0]M57.jpg[/attachment]
Horsehead Nebula
http://www.flickr.com/photos/31986095@N05/
Copyright: Erik Larsen
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- AKA: Bill Metallinos
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Re: Submissions: 2013 April
Hello,
I've got this Supermoon capture from last Supermoon rise at 6 May 2012 over Old Town of Corfu.
Takahashi TOA130
1000mm f7.7
Can eos 40D
I've got this Supermoon capture from last Supermoon rise at 6 May 2012 over Old Town of Corfu.
Takahashi TOA130
1000mm f7.7
Can eos 40D
Re: Submissions: 2013 April
Saturn and some of its moons
Taken on 06 April 2013.
http://500px.com/rafaeldefavari
Copyright: Rafael Defavari
![Image](http://pcdn.500px.net/30338747/5b1800ce69b6052844607227179eb689c7852138/4.jpg)
Click to view full size image
Taken on 06 April 2013.
http://500px.com/rafaeldefavari
Copyright: Rafael Defavari
![Image](http://pcdn.500px.net/30338747/5b1800ce69b6052844607227179eb689c7852138/4.jpg)
Click to view full size image
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Re: Submissions: 2013 April
Andromeda and PanSTARRS above Lake Huron, 5 April 2013
http://pineriverobservatory.files.wordpress.com/
Copyright: David Allan Galbraith Comet C/2011 L4 (PanSTARRS) has been hard to spot from southern Ontario, Canada. On the evening of Friday 5 April 2013 I took several tripod-based, wide-angle dSLR photos from the eastern shore of Lake Huron, about 8 miles south of the town of Kincardine. PanSTARRs and M31 look like very similar little smudges in the middle of this frame, shot at about 9 PM, an hour after sunset (Nikon D7000 at ISO 800, 30 sec, f/3.5 with Tamron 24-270 mm lens at 24 mm focal length).
http://pineriverobservatory.files.wordpress.com/
Copyright: David Allan Galbraith Comet C/2011 L4 (PanSTARRS) has been hard to spot from southern Ontario, Canada. On the evening of Friday 5 April 2013 I took several tripod-based, wide-angle dSLR photos from the eastern shore of Lake Huron, about 8 miles south of the town of Kincardine. PanSTARRs and M31 look like very similar little smudges in the middle of this frame, shot at about 9 PM, an hour after sunset (Nikon D7000 at ISO 800, 30 sec, f/3.5 with Tamron 24-270 mm lens at 24 mm focal length).
Re: Submissions: 2013 April
Hello, it is my first time to post an image here.
6 consecutive days of M31 + Comet Pan-STARRS
Link: https://www.facebook.com/photo.php?fbid ... =1&theater
https://fbcdn-sphotos-a-a.akamaihd.net/ ... 0684_o.jpg
Copyright: TimmyWong Photography
Camera: Canon 500D
Lens: Day 1-2: EF-85mm & DSS 2x drizzle, f/4, iso 800, 60 seconds
Day 3-6: EF-200mm 2.8L, f/3.5, iso 800, 60 seconds
Mount: HL-1
Filter: Astronomik CLS-ccd filter
Software used: DSS, PixInsight, PS
Day 2 -6 are all stacked onto day 1's. Thus form this image. The comet should appear to be dimmer each day, however, this phenomenon does not appear on this image because
1) I have used 85mm and DSS 2x drizzle for the first 2 days, hence a rather low S-N ratio, whereas for day 3-5, I have used 200mm 2.8L therefore a rather hgih S-N ratio.
2) I used f/4 for the first 2 days and f/3.5 for day 3-5, this caused the brightness difference
3) PS technique was not so familiar for the first 2 days
4) Number of frames for day 1-2 were <25 and for day 3-4 >40... this provides the high S-N ratio
M31 is enhanced by masking my another photo that was taken in Sept 2012.
6 consecutive days of M31 + Comet Pan-STARRS
Link: https://www.facebook.com/photo.php?fbid ... =1&theater
https://fbcdn-sphotos-a-a.akamaihd.net/ ... 0684_o.jpg
Copyright: TimmyWong Photography
Camera: Canon 500D
Lens: Day 1-2: EF-85mm & DSS 2x drizzle, f/4, iso 800, 60 seconds
Day 3-6: EF-200mm 2.8L, f/3.5, iso 800, 60 seconds
Mount: HL-1
Filter: Astronomik CLS-ccd filter
Software used: DSS, PixInsight, PS
Day 2 -6 are all stacked onto day 1's. Thus form this image. The comet should appear to be dimmer each day, however, this phenomenon does not appear on this image because
1) I have used 85mm and DSS 2x drizzle for the first 2 days, hence a rather low S-N ratio, whereas for day 3-5, I have used 200mm 2.8L therefore a rather hgih S-N ratio.
2) I used f/4 for the first 2 days and f/3.5 for day 3-5, this caused the brightness difference
3) PS technique was not so familiar for the first 2 days
4) Number of frames for day 1-2 were <25 and for day 3-4 >40... this provides the high S-N ratio
M31 is enhanced by masking my another photo that was taken in Sept 2012.