Andromeda II

Not to be confused with 2 Andromedae or 11 Andromedae.
For Andromeda 11 (Andromeda XI), see List of Andromeda's satellite galaxies.
Andromeda II
Andromeda II, as taken by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationPisces
Right ascension01h 16m 29.8s[1]
Declination+33° 25′ 09″[1]
Redshift−188 ± 3 km/s[1]
Distance2.22 ± 0.07 Mly (680 ± 20 kpc)[2][3]
Apparent magnitude (V)13.5[1]
Characteristics
TypedSph[1]
Apparent size (V)3.6′ × 2.52′[1]
Notable featuressatellite galaxy of M31
Other designations
Andromeda II Dwarf Spheroidal,[1]
PGC 4601,[1][4] And II[5]

Andromeda II (And II) is a dwarf spheroidal galaxy about 2.22 Mly away in the constellation Pisces. While part of the Local Group, it is not quite clear if it is a satellite of the Andromeda Galaxy or the Triangulum Galaxy.[citation needed]

It was discovered by Sidney Van den Bergh[6] in a survey of photographic plates taken with the Palomar 48-inch (1.2 m) Schmidt telescope in 1970 and 1971, together with Andromeda I, Andromeda III, and the presumable non- or background galaxy Andromeda IV.[7]

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Andromeda II. Retrieved 2006-11-29.
  2. ^ I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal. 127 (4): 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
  3. ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6. S2CID 120973010.
  4. ^ "NAME Andromeda II". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-11-29.
  5. ^ Cite error: The named reference Bergh2000 was invoked but never defined (see the help page).
  6. ^ 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.
  7. ^ Van den Bergh, Sydney (January 1972). "Search for Faint Companions to M31". Astrophysical Journal. 171: L31. Bibcode:1972ApJ...171L..31V. doi:10.1086/180861.