Whiting 1

Globular Cluster Whiting 1 (WHI B0200-03), in Cetus

[Whiting 1 image]

Distance from Sun:
98.1 kly
Distance from Galactic Center:
112.5 kly
Apparent Diameter:
1.2 arc min
15.03 mag vis
Radial Velocity:
-130.6 +/- 1.8 km/s
Abs. Mag:
-2.46 Mag vis
Discovered by Whiting, Hau and Irwin in 2002.
Identified as globular cluster by Giovanni Carraro in 2005.

During their hunt for new Local Group galaxies, Whiting, Hau and Irwin (2002) discovered this object and cataloged it as WHI B0200-03, as a suspected star cluster.

Based on CCD photometry in the BVI bands of the spectrum, Carraro (2005) identified it as a compact star cluster of low metallicity ([Fe/H]=-1.20) of approximate age of 5 billion years. It is clearly a halo object, and definitely not an open cluster, but probably one of the youngest globular clusters in the Milky Way's halo.

It was found that this cluster is probably a former member of the Sagittarius Dwarf Elliptical Galaxy (SagDEG), or Sagittarius Dwarf Spheroidal Galaxy (Sgr dSph), the nearby dwarf galaxy discovered in 1994, which is currently in a close and perhaps final encounter before its tidal disruption, with our Milky Way Galaxy.

The image in this page was obtained by Martin Germano - [hi-res version].


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