Back Ursa Minor-dwergsterrestelsel Afrikaans قزمة الدب الأصغر Arabic Nana de l'Ossa Menor Catalan Ursa-Minor-Zwerggalaxie German Enana de la Osa Menor Spanish Pienen karhun kääpiögalaksi Finnish Petite Ourse (Galaxie naine) French הגלקסיה הננסית הדובה הקטנה HE Galassia Nana dell'Orsa Minore Italian こぐま座矮小銀河 Japanese
| Ursa Minor Dwarf | |
|---|---|
 Ursa Minor Dwarf | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Minor |
| 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 is a dwarf spheroidal galaxy, discovered by A.G. Wilson of the Lowell Observatory, in the United States, during the Palomar Sky Survey in 1955.[4] It appears in the Ursa Minor constellation, and is a satellite galaxy of the Milky Way. The galaxy consists mainly of older stars and seems to house little to no ongoing star formation. Its centre is around 225,000 light years distant from Earth.[5]
- ^ 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.
- ^ 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. S2CID 120973010.
- ^ Bergh, Sidney (2000). The Galaxies of the Local Group. Cambridge, United Kingdom: Cambridge University Press. p. 257. ISBN 978-1-139-42965-8.
- ^ Grebel, Eva K.; Gallagher, John S., III; Harbeck, Daniel (2003). "The Progenitors of Dwarf Spheroidal Galaxies". The Astronomical Journal. 125 (4): 1926–39. arXiv:astro-ph/0301025. Bibcode:2003AJ....125.1926G. doi:10.1086/368363. S2CID 18496644.
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