Pegasus Dwarf Spheroidal Galaxy

"Andromeda 6" redirects here. For the star, see 6 Andromedae.

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).

Pegasus Dwarf Spheroidal Galaxy
Hubble Space Telescope image of Pegasus Dwarf Spheroidal Galaxy
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]
Apparent magnitude (V)	14.2[1]
Characteristics
Type	dSph[2]
Apparent size (V)	4.0′ × 2.0′[1]
Notable features	-
Other designations
Pegasus II,[1] Andromeda VI,[1] Peg dSph,[1] KKH 99,[1] PGC 2807158

General information

The 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.

The galaxy was discovered in 1999^[6] by various authors on the Second Palomar Observatory Sky Survey (POSS II) films.^[7]

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

1. ^{^} For an angular distance θ between C and G, their mutual linear distance R is given by:
         R² = D²
   _g + D²
   _c - 2 × D_g × D_c × cos(θ)^[2]