NGC 1555 Hind's variable nebula
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This variable nebula is a cloud of gas/dust associated with the young variable star T Tauri.
2013 Nov 4
Canon EOS 5D MkII ISO 6400
SkyWatcher 254mm Newtonian, f = 1200mm, f/4.8
HEQ5 mount unguided, 46 x 64s = 49.1 minutes total exposure
2013 Nov 4-5 at 23:06:32 - 00:03:29 UT
From Rookhope 54.8
2012 Mar 21
I said on a previous photograph of this nebula that there is much wider nebulosity just visible in the background. So on tonight's attempt I have taken a larger number of exposures (158) to try to show that fainter nebula. This is again pushing the limit of what my equipment can achieve. I was surprised by how green the background is but remember that my DSLR is unmodified, so I only get about half the H-alpha red contribution.
Canon EOS 5D MkII ISO6400 158x32s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Mar 21 20:28:15-22:02:54 UT
From Rookhope 54.8
2012 Mar 18
Canon EOS 5D MkII ISO6400 78x32s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Mar 18 19:50:12-20:37:41 UT
From Rookhope 54.8
Note that the faint suggestion of a much larger cloud covering most of this image is real.
2012 Feb 18
Canon EOS 5D MkII ISO6400 51x32s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Feb 18 21:25:42-21:55:28 UT
From Rookhope 54.8
2012 Jan 16
Canon EOS 5D MkII ISO6400 27x32s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Jan 16 23:40:14-23:55:31 UT
From Rookhope 54.8