NGC 891

IMAGE DETAILS

Object ............................................ NGC 891
Constellation ............................... Andromeda
Distance + Ap. Magnitude......... 27.3 million Light years - 10.8
RA / DEC .....................................  2h:22m.33sec / +42 20m.57sec
Date + Time ...............................   20 - 24/10/2013 - 17:00 UTC
Location ....................................  "Nunki Observatory" - Skiathos
Optics .........................................  
Talahashi TSA 102  f/8
Tools ..........................................   The SKY X 
Camera .....................................   SBIG ST10XE  with CFW10 (Astrodon filters)
Exposure Time.......................     Luminance: 48 X 300 sec (1X1)  RGB: 4 X 600sec (1X1)
More Details ...........................    Environment Temperature : 15oC Camera Temperature  0 οC
Mount .......................................   Paramount ME
Guiding ....................................   Self guided
Processing Details ................    Photoshop , Maxim , CCDsoft
Notes ........................................   Weather:6/10 - Transparence: 4/6 - Humidity : 75-84 %

Target details .........................
  
NGC 891 
(also known as Caldwell 23) is an edge-on unbarred spiral galaxy (actually barred) about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel on October 6, 1784. The galaxy is a member of the NGC 1023 group of galaxies in the Local Supercluster. It has an H II nucleus.The object is visible in small to moderate size telescopes as a faint elongated smear of light with a dust lane visible in larger apertures.In 1999, the Hubble Space Telescope imaged NGC 891 in infrared.In 2005, due to its attractiveness and scientific interest, NGC 891 was selected to be the first light image of the Large Binocular Telescope. In 2012, it was again used as a first light image of the Discovery Channel Telescope with the Large Monolithic Imager.

Nikos Paschalis