HP 1, BH 229

Globular Cluster HP 1 (HP, BH 229, Dufay 1), in Ophiuchus

Distance from Sun:
26.7 kly
Distance from Galactic Center:
1.6 kly
Apparent Diameter:
8.2 arc min
11.59 mag vis
Radial Velocity:
+55.7 +/- 0.7 km/s
Abs. Mag:
-6.46 Mag vis
Discovered by Dufay, Berthier and Morignat in 1954.
Independently rediscovered by van den Bergh and Hagen in 1975.

Globular Cluster HP 1 was discovered by Dufay et.al. (1954), and sometimes referred to as "HP" for the Haute-Provence Observatory where the discovery occurred (e.g., Sawyer Hogg 1959). This designation was mutated to HP 1 as more globular clusters were discovered at that observatory in the 1960s by Terzan.

Until recenztly, it was thought that HP 1 is situated close to the Galactic Center, but recent estimates have put it as far as about 20,000 light years beyond, to a total distance of 46,000 light years from us.


[MW Globulars] | [DSS] | [SIMBAD] | [ADS] | [GGC-DB]
Hartmut Frommert [contact]