Ursa Major II Dwarf

Infobox Galaxy


name = Ursa Major II Dwarf
epoch = J2000
type = dSph-Irr?
ra = RA|08|51|30.0cite web
title=NASA/IPAC Extragalactic Database
work=Results for Ursa Major dSph
url=http://nedwww.ipac.caltech.edu/
accessdate=2008-04-06 ]
dec = DEC|+63|07|48
dist_ly = 98 kly (30 kpc)Fact|date=April 2008
z =
appmag_v = 14.3
size_v =
constellation name = Ursa Major
notes =
names = UMa II dwarf, Ursa Major II dSph

Ursa Major II Dwarf is a dwarf galaxy orbiting the Milky Way galaxy. The discovery by D. B. Zucker et al. was announced in 2006.

It is a small dwarf galaxy with projected size of 250$$imes125 pc. The absolute magnitude of the object is only -3.8, meaning that it is less luminous than some stars, like Canopus in the Milky Way. It is comparable in luminosity to Bellatrix in Orion.

It is located at a distance of about 97,800 light-years from the Earth. There is another object called Ursa Major I Dwarf, discovered by Beth Willman in 2005.

References

* Zucker, D. B.; Belokurov, V.; Evans, N. W.; Kleyna, J. T.; Irwin, M. J.; Wilkinson, M. I.; Fellhauer, M.; Bramich, D. M.; Gilmore, G.; Newberg, H. J.; Yanny, B.; Smith, J. A.; Hewett, P. C.; Bell, E. F.; Rix, H.-W.; Gnedin, O. Y.; Vidrih, S.; Wyse, R. F. G.; Willman, B.; Grebel, E. K.; Schneider, D. P.; Beers, T. C.; Kniazev, A. Y.; Barentine, J. C.; Brewington, H.; Brinkmann, J.; Harvanek, M.; Kleinman, S. J.; Krzesinski, J.; Long, D.; Nitta, A.; Snedden, S. A. 2006, The Astrophysical Journal, 650, L41-L44 (ADS entry [http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:astro-ph/0606633] )

ee also

* Ursa Major I Dwarf
* Ursa Minor Dwarf