M31 - Pentax 150mm zoom lens (Tom Gray)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · HD3431 · HD3447 · HD3765 · HD4143 · HD4174 · HD4322 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224

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M31 - Pentax 150mm zoom lens

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M31 - Pentax 150mm zoom lens

Previous attempts to produce a half decent image of M31 have generally ended badly. While I have my CCD camera attached to my old Pentax SLR lenses, I thought I would have another go, under a dark, transparent sky, with Andromeda riding high at the zenith.

These are my mono frames comprising just over an hour of unguided 60s exposures at f4 in a 150mm zoom lens. I should probably have stopped this down a notch to improve the stars and reduce the ‘softness’ that is common in these under sampled images. That said, given the deteriorating seeing, I was happy with this as a starting point to add some RGB data, (hopefully tonight).

Captured in Envisage, aligned and stacked in ASTAP and processed in Startools 1.7 - I have pushed deconvolution a bit too hard, introducing some ringing, and I should be able to back off with a bit more data.

Altair Astro 183 M/C Hypercams
UK Astro-Imaging
Camera Lens Astrophotography
Low-Cost Astrophotography
Only Monochromatic (Black and White!!!!! NO color, please!)

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	4974401
PixInsight job	RZTU88P4A8WXZSU1NG2KV3LSSKC577LZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m32s.21
RA (top/left)	00h49m00s.59
RA (top/right)	00h48m47s.24
RA (bottom/right)	00h35m44s.76
RA (bottom/left)	00h36m35s.46

Dec (center)	+41°22′40″.4
Dec (top/left)	+39°48′58″.0
Dec (top/right)	+42°59′36″.2
Dec (bottom/right)	+42°55′01″.9
Dec (bottom/left)	+39°44′23″.7

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M31 - Pentax 150mm zoom lens

M31 - Pentax 150mm zoom lens

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M31 - Pentax 150mm zoom lens

M31 - Pentax 150mm zoom lens

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