NGC 891

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NGC 891

Spiral Galaxy NGC 891
Observation data (J2000 epoch)
Constellation Andromeda
Right ascension 02h 22m 33.4s[1]
Declination +42° 20′ 57″[1]
Redshift 528 ± 4 km/s[1]
Distance 27.3 ± 1.8 Mly (8.4 ± 0.5 Mpc)[2]
Type SA(s)b?[1]
Apparent dimensions (V) 13′.5 × 2′.5[1]
Apparent magnitude (V) 10.8[1]
Other designations
UGC 1831, PGC 9031[1]
See also: Galaxy, List of galaxies

NGC 891 is an edge on unbarred spiral galaxy about 30 million light-years away in the constellation Andromeda. It was discovered by William Herschel in August 1783. The galaxy in a member of NGC 1023 group of galaxies in the Local Supercluster. It has a H II nucleus.[3]

Visually, 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, this image can be seen below.

A close up infrared Hubble Space Telescope (HST) image of NGC 891. Credit: HST/NASA/ESA.
A close up infrared Hubble Space Telescope (HST) image of NGC 891. Credit: HST/NASA/ESA.


[edit] See also

[edit] External links

[edit] References

  1. ^ a b c d e f g NASA/IPAC Extragalactic Database. Results for NGC 891. Retrieved on 2006-11-18.
  2. ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546 (2): 681-693. doi:10.1086/318301. 
  3. ^ Ho, Luis C.; Filippenko, Alexei V. & Sargent, Wallace L. W. (October 1997), “A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies”, Astrophysical Journal Supplement 112: 315-390 
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