Pegasus Dwarf Spheroidal Galaxy

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"Andromeda 6" redirects here. For the star, see 6 Andromedae.
Pegasus Dwarf Spheroidal Galaxy
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Observation data (J2000 epoch)
Constellation Pegasus
Right ascension 23h 51m 46.3s[1]
Declination +24° 34′ 57″[1]
Redshift −354 ± 3 km/s[1]
Distance 2.7 ± 0.1 Mly (820 ± 20 kpc)[2][3]
Type dSph[2]
Apparent dimensions (V) 4′.0 × 2′.0[1]
Apparent magnitude (V) 14.2[1]
Notable features -
Other designations
Pegasus II,[1] Andromeda VI,[1] Peg dSph,[1] KKH 99,[1] PGC 2807158
See also: Galaxy, List of galaxies

The Pegasus Dwarf Spheroidal (also known as Andromeda VI or Peg dSph for short) is a dwarf spheroidal galaxy about 2.7 million light-years away in the constellation Pegasus. The Pegasus Dwarf is a member of the Local Group and a satellite galaxy of the Andromeda Galaxy (M31).

General information

Pegasus Dwarf Spheroidal is a galaxy with mainly metal-poor stellar populations.[4] Its metallicity is [Fe/H] ≃ −1.3.[5] It is located at the right ascension 23h51m46.30s and declination +24d34m57.0s in the equatorial coordinate system (epoch J2000.0), and in a distance of 820 ± 20 kpc from Earth and a distance of 294 ± 8 kpc[a] from the Andromeda Galaxy.

Pegasus Dwarf Spheroidal was discovered in 1999[6] by various authors on the Second Palomar Sky Survey (POSS-II) films.[7]

See also

Notes

  1. ^ For an angular distance θ between C and G, their mutual linear distance R is given by:
          R2 = D2
    g     + D2
    c     - 2 × Dg × Dc × cos(θ)[2]

References

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External links

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