M31_2009-07-25

Galaxies - M 31

R.A.: 0h 42m 44.3s
Dec.: +41° 16' 9.4"
Mag.: 4.4

The Andromeda Galaxy (also known as Messier 31, M31, or NGC 224) is a spiral galaxy approximately 2.5 million light-years away in the constellation Andromeda. It is the nearest spiral galaxy to our own, the Milky Way. As it is visible as a faint smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars. It is named after the princess Andromeda in Greek mythology.

© Wikipedia

M 31 – Andromeda Galaxy

Date/time:
25.07.2009 02:36 to 25.07.2009 04:10
26.07.2009 02:40 to 26.07.2009 04:25
Az./Alt. positions:
77° / 54° to 90° / 71°
78° / 55° to 93° / 74°
Ambient conditions: 22°C to 25°C, transparency 5/5, seeing 5/5
Location: Monte Amiata, Agriturismo Poggiobello, Italy

Equipment:
Optics: TMB 92 SS f/5.5 with TSFlat 2
Mount: CGE
Guiding: selfguiding with ST-4000XCM
Camera: SBIG ST-4000XCM
Filters: No

Acquisition:
Software: CCDSoft V5
FOV, Image scale: 100.9 x 100.9 arcmin, 3,01 arcs/pixel
Sub-exposures: 3h 10min (9 x 10min at –10°C + 10 x 10min at –15°C),
50 x 10min dark frames at –10°C and –15°C,
30 x 0.02s EL flats at –10°C
50 bias at –10°C for flats calibration

Processing:
Images Plus 3.75: Calibration, stacking, Deconvolution.
CS3: Curves, Levels, Match Color, noise reductuin in Carbonis’ Actions, Smart sharpen.

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Filename: galaxies/m31_2009-07-25_full.jpg
Filesize: 2954906 Kb
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