Andromeda IV

Andromeda IV

Andromeda IV just about 30″ to the right from TYC 2801-551-1 star (mag: 10.3); HST
Observation data (J2000 epoch)
Constellation Andromeda
Right ascension 00h 42m 32.3s[1]
Declination +40° 34′ 19″[1]
Redshift 256 ± 9 km/s[1]
Type Dwarf irregular[1]
Apparent dimensions (V) 1′.3 × 1′.0[1]
Apparent magnitude (V) 16.6B[1]
Other designations
And IV,[1] PGC 2544[1]
See also: Galaxy, List of galaxies

Coordinates: 00h 42m 32.3s, +40° 34′ 19″ Andromeda IV (And IV) might be an irregular satellite of the Andromeda Galaxy; however it is more probably not a galaxy at all, but a loosely bound star cluster or some other background feature.

History

It was discovered by Sidney van den Bergh.[2]

References

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Andromeda IV. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Andromeda+IV#ObjNo1. Retrieved 2007-03-15. 
  2. ^ McConnachie, A. W.; Irwin, M. J.; Ferguson, A. M. N.; Ibata, R. A.; Lewis, G. F.; Tanvir, N. (2005). "Distances and metallicities for 17 Local Group galaxies". Monthly Notices of the Royal Astronomical Society 356 (4): 979–997. arXiv:astro-ph/0410489. Bibcode 2005MNRAS.356..979M. doi:10.1111/j.1365-2966.2004.08514.x.