|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
ASTRO: Gyulbudaghian's (Variable) Nebula
Gyulbudaghian's Nebula is a highly variable nebula lit up by PV Cephi.
The star is also the source of HH-215. No two images of this one look the same. Sometimes it is just a faint, rather white jet, other times there's a very obvious reflection nebula. Sometimes it is somewhat diffuse and blue other times rather white and detailed. This is the way I found it when my data was taken on September 24, 2011 (UT). Compare it to this image taken in October, 2010 http://www.caelumobservatory.com/gallery/PVCephei.shtml . Then there's this very wide field image, west up, taken in 2008 when it was more like seen in my image, http://tvdavisastropics.com/astroimages-1_000067.htm . It is virtually invisible in this,east up, July 2009 image http://www.astroeder.com/deepsky/350...68_eder_en.htm . I'll save my fingers by referring further discussion to these links. http://observing.skyhound.com/archives/oct/GM_1-29.html http://iopscience.iop.org/0004-637X/.../59148.web.pdf There are a surprising number of distant galaxies in the image once you look outside the nebulous regions. NED lists some invisible ones from the 2MASS catalog that are visible only at 2 microns and not visible light. Those not seen at 2 microns aren't listed however. The blue somewhat edge on spiral above and a bit left of the reflection nebula is an example. I didn't expect so many faint fuzzies in this region of the sky. 14" LX200R @ f/10, L=8x10 RG=2x10' B=4x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
#2
|
|||
|
|||
I have to stop doing this so late at night. Yet again I grabbed a wrong image. The cropped image was right but not the full image. Correct one attached.
Rick -- Prefix is correct. Domain is arvig dot net[/quote] |
#3
|
|||
|
|||
ASTRO: Gyulbudaghian's (Variable) Nebula
Great image Rick.
The shape of the nebula is remarkably similar to NGC 2261. Stefan "Rick Johnson" schrieb im Newsbeitrag ... Gyulbudaghian's Nebula is a highly variable nebula lit up by PV Cephi. The star is also the source of HH-215. No two images of this one look the same. Sometimes it is just a faint, rather white jet, other times there's a very obvious reflection nebula. Sometimes it is somewhat diffuse and blue other times rather white and detailed. This is the way I found it when my data was taken on September 24, 2011 (UT). Compare it to this image taken in October, 2010 http://www.caelumobservatory.com/gallery/PVCephei.shtml . Then there's this very wide field image, west up, taken in 2008 when it was more like seen in my image, http://tvdavisastropics.com/astroimages-1_000067.htm . It is virtually invisible in this,east up, July 2009 image http://www.astroeder.com/deepsky/350...68_eder_en.htm . I'll save my fingers by referring further discussion to these links. http://observing.skyhound.com/archives/oct/GM_1-29.html http://iopscience.iop.org/0004-637X/.../59148.web.pdf There are a surprising number of distant galaxies in the image once you look outside the nebulous regions. NED lists some invisible ones from the 2MASS catalog that are visible only at 2 microns and not visible light. Those not seen at 2 microns aren't listed however. The blue somewhat edge on spiral above and a bit left of the reflection nebula is an example. I didn't expect so many faint fuzzies in this region of the sky. 14" LX200R @ f/10, L=8x10 RG=2x10' B=4x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
#4
|
|||
|
|||
ASTRO: Gyulbudaghian's (Variable) Nebula
It was last year. I've not looked to see what it is like this year. It
varies yearly at least. Probably a lot faster than that. Rick On 9/14/2012 1:23 PM, Stefan Lilge wrote: Great image Rick. The shape of the nebula is remarkably similar to NGC 2261. Stefan "Rick Johnson" schrieb im Newsbeitrag ... Gyulbudaghian's Nebula is a highly variable nebula lit up by PV Cephi. The star is also the source of HH-215. No two images of this one look the same. Sometimes it is just a faint, rather white jet, other times there's a very obvious reflection nebula. Sometimes it is somewhat diffuse and blue other times rather white and detailed. This is the way I found it when my data was taken on September 24, 2011 (UT). Compare it to this image taken in October, 2010 http://www.caelumobservatory.com/gallery/PVCephei.shtml . Then there's this very wide field image, west up, taken in 2008 when it was more like seen in my image, http://tvdavisastropics.com/astroimages-1_000067.htm . It is virtually invisible in this,east up, July 2009 image http://www.astroeder.com/deepsky/350...68_eder_en.htm . I'll save my fingers by referring further discussion to these links. http://observing.skyhound.com/archives/oct/GM_1-29.html http://iopscience.iop.org/0004-637X/.../59148.web.pdf There are a surprising number of distant galaxies in the image once you look outside the nebulous regions. NED lists some invisible ones from the 2MASS catalog that are visible only at 2 microns and not visible light. Those not seen at 2 microns aren't listed however. The blue somewhat edge on spiral above and a bit left of the reflection nebula is an example. I didn't expect so many faint fuzzies in this region of the sky. 14" LX200R @ f/10, L=8x10 RG=2x10' B=4x10', STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
ASTRO: Hubble's Variable Nebula, 2012 compared to 2011 | Rick Johnson[_2_] | Astro Pictures | 1 | April 23rd 12 09:25 PM |
ASTRO: Hubble's Variable Nebula | Rick Johnson[_2_] | Astro Pictures | 6 | February 10th 11 05:14 AM |
ASTRO: Hind's Variable Nebula, a huge molecular cloud and 9 asteroids-- no waiting | Rick Johnson[_3_] | Astro Pictures | 2 | February 18th 08 11:28 PM |
ASTRO: T Tarui and Hind's Variable Nebula | Rick Johnson[_2_] | Astro Pictures | 0 | February 1st 07 11:41 PM |
Hubble's Variable Nebula | Rick Johnson[_2_] | Astro Pictures | 1 | January 3rd 07 10:13 PM |