Andromeda IV

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Galaxy
Andromeda IV
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Andromeda IV about 30 "to the right of star TYC 2801-551-1 as captured by HST
Andromeda IV about 30 "to the right of star TYC 2801-551-1 as captured by HST
AladinLite
Constellation Andromeda
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 00 h 42 m 32.3 s
declination + 40 ° 34 ′ 19 ″
Appearance
Morphological type dIm  
Brightness  (B-band) 16.6 mag
Angular expansion 1 ′, 3 × 1 ′, 0
Physical data
Affiliation LGG 11  
Redshift 0.000854 ± 0.000030  
Radial velocity (256 ± 9) km / s  
distance (20,500,000 ± 3,250,000) Lj /
(± 6.300.000 1.000.000) pc
history
discovery Sidney van den Bergh
Discovery date 1970
Catalog names
PGC  2544 • And IV, RC2 Anon 0032 + 36, BTW2003 J0042 + 4031

Andromeda IV also briefly And IV is an irregular dwarf galaxy (DIM) in the constellation of Andromeda . The galaxy is about 20 million light years from our solar system. At this distance, Andromeda IV would not be a member of the local group and is also not a satellite of the Andromeda Galaxy M31.

And IV was discovered by Sidney van den Bergh in 1970 within a survey with photographic plates taken with the 1.2 m Oschin Schmidt telescope of the Palomar Observatory in 1970 and 1971 together with Andromeda I , Andromeda II , and the probable background galaxy Andromeda III .

additional

Individual evidence

  1. ↑ a b c d e f NASA / IPAC Extragalactic Database . In: Results for Andromeda IV . Retrieved January 21, 2008.
  2. ↑ a b McConnachie, AW; Irwin, MJ; Ferguson, AMN; Ibata, RA; Lewis, GF; Tanvir, N .: Distances and metallicities for 17 Local Group galaxies . In: Monthly Notices of the Royal Astronomical Society . 356, No. 4, 2005, pp. 979-997. arxiv : astro-ph / 0410489 . bibcode : 2005MNRAS.356..979M . doi : 10.1111 / j.1365-2966.2004.08514.x .
  3. ↑ SIMBAD Astronomical Database . In: Results for AndIV . Retrieved November 29, 2006.
  4. ^ Sidney van den Bergh: Search for Faint Companions to M31 . In: Astrophysical Journal . 171, January 1972, p. L31. bibcode : 1972ApJ ... 171L..31V . doi : 10.1086 / 180861 .

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