Ursa Minor Dwarf
| Ursa Minor Dwarf | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Ursa Minor constellation |
| Right ascension | 15h 09m 08.5s[1] |
| Declination | +67° 13′ 21″[1] |
| Redshift | -247 ± 1 km/s[1] |
| Distance | 200 ± 30 kly (60 ± 10 kpc)[2][3] |
| Apparent magnitude (V) | 11.9[1] |
| Characteristics | |
| Type | E[1] |
| Apparent size (V) | 30′.2 × 19′.1[1] |
| Notable features | satellite galaxy of Milky Way |
| Other designations | |
| UGC 9749,[1] PGC 54074,[1] DDO 199,[1] UMi Dwarf[1] | |
The Ursa Minor Dwarf dwarf elliptical galaxy was discovered by A.G. Wilson of the Lowell Observatory in 1954. It is part of the Ursa Minor constellation, and a satellite galaxy to the Milky Way. The galaxy consists mainly of older stars and there appears to be little to no ongoing star formation in the Ursa Minor Dwarf galaxy.
Evolutionary history
In 1999, Mighell & Burke used the Hubble Space Telescope to confirm that the UMi system had a straight forward evolutionary history with a single ~2 billion years long burst of star formation around 11 billion years ago.[4]
See also
References
- ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for Ursa Minor Dwarf. Retrieved 2006-11-29.
- ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal. 127 (4): 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ 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. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ van den Bergh, Sidney (April 2000). "Updated Information on the Local Group". The Publications of the Astronomical Society of the Pacific. 112 (770): 529–536. arXiv:astro-ph/0001040. Bibcode:2000PASP..112..529V. doi:10.1086/316548.
{{cite journal}}: CS1 maint: date and year (link)
External links
- The Ursa Minor Dwarf on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
| Location | Milky Way → Milky Way subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → Local Hole → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". |  | |||||
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