April 2013 - Utah-Astronomy - mailman.xmission.com

New Image - NGC4631, the Whale and Pup Galaxies - Nocturne Observatory
by Tyler Allred 23 Apr '13

23 Apr '13

Hello All, I spent the nights of March 17th and 18th working on a single image of NGC4631, with my new 12.5" Zambuto homemade astrograph, dubbed the "Supernova Astrograph". Here is a link to the image on my website. http://www.allred-astro.com//viewer.php?id=119 <http://www.allred-astro.com/viewer.php?id=119&cat=1&sub=23> &cat=1&sub=23 If you click the image a couple of times you can get to the full version. It is worth taking a few minutes to peruse because there is lots of detail in the main galaxy and there are tons of small galaxies scattered throughout the image. This composite LRGB image is composed of . 24 luminance exposures, of 10 minutes each, unbinned . 18 red exposures, of 5 minutes each, binned 2x2 . 18 green exposures, of 5 minutes each, binned 2x2 . 18 blue exposures, of 5 minutes each, binned 2x2 I might try to add some hydrogen alpha data to the image, but perhaps it would be a waste of time, since the plain RGB image picked up the magenta star-forming regions quite well. I hope you enjoy the image. Cheers, Tyler

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PANSTARRS this morning, 2013 APR 23
by Patrick Wiggins 23 Apr '13

23 Apr '13

A quick 60 second shot of PANSTARRS before shutting down for the night. Considering how much I'm getting in my tiny FOV I wonder how much those on the list with wide field imaging equipment might register. http://users.wirelessbeehive.com/~paw/temp/C_2011_L4.2013APR23.JPG patrick

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Color perception (WAS: Re: Today's APOD: Infrared Horsehead)
by Chuck Hards 23 Apr '13

23 Apr '13

Joe, you've never heard of people who associate colors with sounds, or even certain numbers or printed text? It's a fascinating phenomenon, if you care to research it. I'm afraid that colors, as we perceive them, are not an intrinsic quality of a particular wavelength. I wouldn't discount the possibility that an alien race that evolved under a sun with the same color as ours, or very close to it, and with vision that is active over approximately the same wavelength range as ours, would probably perceive colors similarly to us. But another alien race, with vision sensitive above or below what we can see, might look at our sky and see something very, very different than what we call "blue". The rainbow would look very different to a race with microwave-sensitive vision, or vision sensitive to infra-red wavelengths. On this planet, we're all on the same page as to what "green" looks like, but to a race with spectral sensitivity different than ours, their "rainbow" would be composed of a pallet that we may not even be able to conceive of. It's a pretty cool idea, actually. Color perception is relative, not absolute or intrinsic to wavelength, except among beings with the same eye and brain mechanisms. There are even documented cases of human beings who's eyes are sensitive to a broader spectrum than the general population, due to a physiological difference in the retina. They see colors very differently than even their fellow human beings. There's a good argument right there that color association, or perception, isn't intrinsic to wavelength, and doesn't require "what ifs" or aliens spawned under a different colored sun. On Mon, Apr 22, 2013 at 12:09 PM, Joe Bauman <josephmbauman(a)yahoo.com>wrote: > > > Associating colors with sound, this one sounds like WOW! (Chuck, I don't > disagree that colors are perceived by our brains, but I argue that whatever > they are like, they exist independently of our brains in definable ways, as > shown by our measurements. And we can represent these actual wavelengths by > printed colors that we can identify visually.) -- Joe > > > ------------------------------ > On Mon, Apr 22, 2013 6:28 AM MDT Chuck Hards wrote: > > >Wow that is remarkable. I can't recall ever seeing the Horsehead in such > >detail. And good choice of colors on the part of the people who processed > >the image. Gives it quite a ghostly appearance. > > > >I know Joe will disagree with me, but color only exists in the minds of > >some living creatures. It is our way of distinguishing different > >wavelengths of light energy. The colors you perceive mostly depends on > the > >environment your ancestors evolved in. For the purposes of argument, I'm > >setting-aside singular mutations and those cases where, due to a > difference > >in brain wiring (for whatever reason, injury or otherwise), some > >individuals percieve colors associated with sounds, for example, or > shapes. >

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See ISS twice tonight
by Patrick Wiggins 22 Apr '13

22 Apr '13

CalSky is predicting two ISS passes for northern Utah tonight (all times at MDT): Monday 22 April 2013 Appears 20h27m31s 2.6mag az:311.8° NW horizon Culmination 20h32m32s -2.1mag az: 20.8° NNE h:20.8° distance: 981.8km height above Earth: 411.6km elevation of Sun: -4° Disappears 20h36m41s -1.2mag az: 85.4° E h:3.2° Appears 22h04m03s 2.9mag az:304.6° NW horizon Culmination 22h09m25s -4.1mag az:218.8° SW h:71.0° distance: 428.9km height above Earth: 408.2km elevation of Sun: -20° Disappears 22h09m26s -4.2mag az:214.5° SW h:71.0° patrick

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ISON tonight / ISS passes
by Patrick Wiggins 22 Apr '13

22 Apr '13

ISON's back to mostly hiding in the washed out sky tonight. It's there, but just barely. http://users.wirelessbeehive.com/~paw/temp/C_2012_S1.2013APR23.JPG Unlike tonight's ISS passes which were really rather nice. I always enjoy seeing it turn sunset colors as it passes into the terminator. patrick

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Re: [Utah-astronomy] Today's APOD: Infrared Horsehead
by Joe Bauman 22 Apr '13

22 Apr '13

Hey Tyler, if we used that standard, your photos would be enough to make all the rest of give up! ------------------------------ On Mon, Apr 22, 2013 11:27 AM MDT Tyler Allred wrote: >That horsehead image is the best astrophoto I have ever seen. Maybe I >should just sell all my gear and give up on the hobby... >Tyler > > >-----Original Message----- >From: utah-astronomy-bounces(a)mailman.xmission.com >[mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Kelly >Ricks >Sent: Monday, April 22, 2013 5:46 AM >To: utah-astronomy(a)mailman.xmission.com >Subject: [Utah-astronomy] Today's APOD: Infrared Horsehead > >I think today's APOD will go down as one of my all time favorites! I am >blown away by the detail and dimension. It makes me really excited to see >what the James Webb sends back in a few years. Maybe I won't miss >visual-light images as much as I thought I might. > >~Kelly >_______________________________________________ >Utah-Astronomy mailing list >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > >Send messages to the list to >Utah-Astronomy(a)mailman.xmission.com > >The Utah-Astronomy mailing list is not affiliated with any astronomy club. > >To unsubscribe go to: >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Then enter your email address in the space provided and click on >"Unsubscribe or edit options". > > >_______________________________________________ >Utah-Astronomy mailing list >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > >Send messages to the list to >Utah-Astronomy(a)mailman.xmission.com > >The Utah-Astronomy mailing list is not affiliated with any astronomy club. > >To unsubscribe go to: >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Then enter your email address in the space provided and click on "Unsubscribe or edit options".

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Re: [Utah-astronomy] Today's APOD: Infrared Horsehead
by Joe Bauman 22 Apr '13

22 Apr '13

Associating colors with sound, this one sounds like WOW! (Chuck, I don't disagree that colors are perceived by our brains, but I argue that whatever they are like, they exist independently of our brains in definable ways, as shown by our measurements. And we can represent these actual wavelengths by printed colors that we can identify visually.) -- Joe ------------------------------ On Mon, Apr 22, 2013 6:28 AM MDT Chuck Hards wrote: >Wow that is remarkable. I can't recall ever seeing the Horsehead in such >detail. And good choice of colors on the part of the people who processed >the image. Gives it quite a ghostly appearance. > >I know Joe will disagree with me, but color only exists in the minds of >some living creatures. It is our way of distinguishing different >wavelengths of light energy. The colors you perceive mostly depends on the >environment your ancestors evolved in. For the purposes of argument, I'm >setting-aside singular mutations and those cases where, due to a difference >in brain wiring (for whatever reason, injury or otherwise), some >individuals percieve colors associated with sounds, for example, or shapes. > >Thanks for calling it to our attention, Kelly! > > > >On Mon, Apr 22, 2013 at 5:46 AM, Kelly Ricks <kellyalenericks(a)gmail.com>wrote: > >> I think today's APOD will go down as one of my all time favorites! I am >> blown away by the detail and dimension. It makes me really excited to see >> what the James Webb sends back in a few years. Maybe I won't miss >> visual-light images as much as I thought I might. >> >> >_______________________________________________ >Utah-Astronomy mailing list >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > >Send messages to the list to >Utah-Astronomy(a)mailman.xmission.com > >The Utah-Astronomy mailing list is not affiliated with any astronomy club. > >To unsubscribe go to: >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Then enter your email address in the space provided and click on "Unsubscribe or edit options".

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Newton in the funnies
by Patrick Wiggins 22 Apr '13

22 Apr '13

From yesterday's strip: http://www.gocomics.com/bc/2013/04/21 Grins, patrick

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PR in Trib
by Joe Bauman 22 Apr '13

22 Apr '13

Hi Friends, I just now realized that the Tribune's Sheena McFarland published this Astronomy Day piece on April 16. Thanks, Joe http://www.sltrib.com/sltrib/news/56167023-78/astronomy-saturday-party-plan…

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Re: [Utah-astronomy] New Image - NGC4631, the Whale and Pup Galaxies - Nocturne Observatory
by Joe Bauman 21 Apr '13

21 Apr '13

Plenty of detail, Tyler! ------------------------------ On Sat, Apr 20, 2013 2:01 PM MDT Tyler Allred wrote: >Hello All, > >I spent the nights of March 17th and 18th working on a single image of >NGC4631, with my new 12.5" Zambuto homemade astrograph, dubbed the >"Supernova Astrograph". > > > >Here is a link to the image on my website. > > > >http://www.allred-astro.com//viewer.php?id=119 ><http://www.allred-astro.com/viewer.php?id=119&cat=1&sub=23> &cat=1&sub=23 > > > >If you click the image a couple of times you can get to the full version. >It is worth taking a few minutes to peruse because there is lots of detail >in the main galaxy and there are tons of small galaxies scattered throughout >the image. > > > >This composite LRGB image is composed of > >. 24 luminance exposures, of 10 minutes each, unbinned > >. 18 red exposures, of 5 minutes each, binned 2x2 > >. 18 green exposures, of 5 minutes each, binned 2x2 > >. 18 blue exposures, of 5 minutes each, binned 2x2 > > > >I might try to add some hydrogen alpha data to the image, but perhaps it >would be a waste of time, since the plain RGB image picked up the magenta >star-forming regions quite well. > > > >I hope you enjoy the image. > >Cheers, > >Tyler > > > >_______________________________________________ >Utah-Astronomy mailing list >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy > >Send messages to the list to >Utah-Astronomy(a)mailman.xmission.com > >The Utah-Astronomy mailing list is not affiliated with any astronomy club. > >To unsubscribe go to: >http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy >Then enter your email address in the space provided and click on "Unsubscribe or edit options".

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