Pegasus Dwarf Spheroidal Galaxy
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| Pegasus dwarf spheroidal galaxy (center cluster). |
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| Observation data: J2000 epoch | |
|---|---|
| Constellation: | Pegasus |
| Right ascension: | 23h 51m 46.3s[2] |
| Declination: | +24° 34′ 57″[2] |
| Redshift: | -354 ± 3 km/s[2] |
| Distance: | 2.7 ± 0.1 Mly (820 ± 20 kpc)[3][1] |
| Type: | dSph[1] |
| Apparent dimensions (V): | 4′.0 × 2′.0[2] |
| Apparent magnitude (V): | 14.2[2] |
| Notable features: | - |
| Other designations | |
| Pegasus II,[2] Andromeda VI,[2] Peg dSph,[2] KKH 99[2] |
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| 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 of galaxies and a satellite galaxy of the Andromeda Galaxy (M31).
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[edit] General information
Pegasus Dwarf Spheroidal is a galaxy with mainly metal-poor stellar populations.[citation needed] Its metallicity is [Fe/H] ≃ −1.3.[4] 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 by various authors on the Second Palomar Sky Survey (POSS-II) films.
[edit] Other resources
[edit] External links
- NASA/IPAC Extragalactic Database: Pegasus Dwarf Spheroidal
- Armandroff, Jacoby, & Davies, "Low Surface Brightness Galaxies around M31", Astrophys. J. 118, 1220-1229 (1999).
[edit] See also
- Andromeda's satellite galaxies
- Pegasus Dwarf Irregular Galaxy (Peg DIG)
- Pegasus galaxy, the Stargate Atlantis fictional location (probably the Pegasus Dwarf Irregular Galaxy).
[edit] Notes
[edit] References
- ^ a b c 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.
- ^ a b c d e f g h i NASA/IPAC Extragalactic Database. Results for Pegasus Dwarf Spheroidal. Retrieved on 2006-11-11.
- ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal 127: 2031-2068.
- ^ 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.
