Willman 1

RA:

10 : 49.4

Dec:

+ 51 : 03

Distance from Sun:

124 (147?) kly

Distance from Galactic Center:

kly

Apparent Diameter:

1.75 arc min

Brightness:

15.3 mag vis

Radial Velocity:

Diameter:

Abs. Mag:

Considered a Globular Cluster Candidate by Harris (2010), this object was discovered by Beth Willman et.al. and considered either a globular cluster or a dwarf spheroidal (dSph) galaxy in the Local Group, a satellite of the Milky Way (Willman et.al. 2005a, Willman et.al. 2005b). Sidney van den Bergh investigated it in 2008, and found it more likely to be a Local Group dwarf galaxy (van den Bergh 2008a, 2008b).

.. more to come ..

References

• Beth Willman et.al., 2005a. A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite? The Astronomical Journal, Volume 129, Issue 6, pp. 2692-2700 (June 2005). [ADS: 2005AJ....129.2692] -- [Preprint: arXiv:astro-ph/0410416]
• Beth Willman et.al., 2005b. A New Milky Way Dwarf Galaxy in Ursa Major. The Astrophysical Journal, Volume 626, Issue 2, pp. L85-L88 (June 2005). [ADS: 2005ApJ...626L..85W] -- [Preprint: arXiv:astro-ph/0503552]
• Sidney van den Bergh, 2008a. Globular clusters and dwarf spheroidal galaxies. Monthly Notices of the Royal Astronomical Society: Letters, Volume 385, Issue 1, pp. L20-L22 (March 2008). [ADS: 2008MNRAS.385L..20V] [Preprrint: arXiv:0711.4795 [astro-ph]]
• Sidney van den Bergh, 2008b. The luminosity-diameter relations for globular clusters and dwarf spheroidal galaxies. Monthly Notices of the Royal Astronomical Society: Letters, Volume 390, Issue 1, pp. L51-L53 (October 2008). [ADS: 2008MNRAS.390L..51V] -- [Preprint: arXiv:0807.2798 [astro-ph]]