Gyulbudaghian's Nebula
Home

Type Location r.a. dec. Size Magnitude Distance
Variable Nebula Cepheus 20h45.5 +67°58' 1'

The Gyulbudaghian's nebula is one of the very few deep sky objects varying in shape over a short time. The reason for the variation is unclear. Some suspect the source to be a variable star. It may also be some storm in the dust clouds in front of the star.

I have been imaging this nebula every summer since 2002. It disappeared completely in 2009 and appeared again in 2010. It's 2013 shape is very close to it's 2002 shape.
In 2007, I could observe strong variations in shape over a short period of 4 months.
In 2015, I imaged the nebula in September and October and the shape changed...
 

Aug 13, 2002 image:

Aug 5, 2008 image, the nebula is barely visible, it will not reappear until 2010

Aug 30, 2013 image, the nebula is back in all its glory...

Oct 14, 2014 image, little change...

Sep 10, 2015 -> Oct 8, 2015, change in shape is obvious over one month...

 

Animation showing yearly evolution from 2002 to 2013:
(There is no 2012 image as the telescope has been out of order at that time)

Animation showing quick variations in shape from August to November 2007:

Available images on request (FITS or .ST7):
Aug 13, 2002 - July 9, 2003 - Aug 5, 2004 - Aug 29, 2005 - Jul 2, 2006 - Aug 29, 2007 - Oct 19, 2007 - Nov 12, 2007 - Aug 5, 2008
Aug 29, 2008 - Aug 30, 2008 - Sep 9, 2008 - Sep 20, 2008 - Sep 26, 2008 - Aug 17, 2009 - Sep 8, 2009 - Sep 23, 2009 - Aug 30, 2010
Aug 31, 2010 - Sep 9, 2010 - Aug 21, 2011 - Sep 23, 2011 - Sep 27, 2011 - Aug 30, 2013 - Sep 1, 2013 - Sep 4, 2013 

Date Telescope Binning Exp Time (s) Special processing Notes
Aug 13, 2002 Centurion
18"
L 1:1
RGB 3:1
L 3x300
R,G,B 300
 LRGB