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NGC 891 is one of my favourite galaxies ( so far ) , so I am dedicating a page to it, as I will be putting lots of entries into this.
NGC891 / Galaxy, type SA(s)b? sp III | |
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R.A. | 02h 22m 36.0s (2000.0) |
Dec. | +42° 21' 00" (2000.0) |
Apparent Size | 13.5 x 2.8' |
Radial Velocity | N/A |
Magnitude | 10.9 |
Distance | 30-40 million light years |
Group of Galaxies | N/A |
Other IDs | UGC1831, MCG7-5-46, CGCG538-52, PGC09031 |
Scope | 8" mn-86 Matsukov Newtonian |
Mount | EQ6 under EDMOD/Ascom control |
Exposure | Lrgb L=97 x 300 sec IR , rgb=each 18 x 300 sec binned 2x2 |
Post-processing | grad removed,DDP, High pass filter, aligned & stacked in AA4 |
Filters | IR, rgb |
Camera | Starlight Express SXV-H9 with guidehead |
Location | Claines |
Date | 4 nights between 8th-17th Sept 2007 |
Scope | 5" mn-56 Matsukov Newtonian |
Mount | Vixen GP-DX unguided |
Exposure | LRGB 206:23:23:23 ( L image as above ) |
Post-processing | Dark framed, aligned, DDP & unsharp masking in AA, LRGB stacked in PSP 7 |
Filters | Trutek IR , R,G,B |
Camera | Starlight Express hx516 |
Location | Claines |
Date | 13th Nov 2004 |
1st genuine deep sky colour attempt. Re-processed again on the 11th march 2005 using Rob Pollards technique detailed here .