Pegasus Dwarf Spheroidal Galaxy
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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
The Pegasus Dwarf Spheroidal is a galaxy with mainly metal-poor stellar populations.[1] Its metallicity is [Fe/H] ≃ −1.3.[2] 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<templatestyles src="Citation/styles.css"/>[a] from the Andromeda Galaxy.
The galaxy was discovered in 1999[3] by various authors on the Second Palomar Observatory Sky Survey (POSS II) films.[4]
See also
- List of Andromeda's satellite galaxies
- Pegasus Dwarf Irregular Galaxy (Peg DIG)
- Pegasus galaxy, the Stargate Atlantis fictional location (probably the Pegasus Dwarf Irregular Galaxy).
Notes
- <templatestyles src="Citation/styles.css"/>^ For an angular distance θ between C and
G, their mutual linear distance R is given by:
R2 = DTemplate:Sup sub + DTemplate:Sup sub - 2 × Dg × Dc × cos(θ)[5]