HP 1, BH 229

RA:

17:31:05.2

Dec:

-29:58:54

Distance from Sun:

26.7 kly

Distance from Galactic Center:

1.6 kly

Apparent Diameter:

8.2 arc min

Brightness:

11.59 mag vis

Radial Velocity:

+55.7 +/- 0.7 km/s

Diameter:

ly

Abs. Mag:

-6.46 Mag vis

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.

• Catalog of Variable Stars in Haute Provence 1 (HP1) (Christine Clement)

• Jean Dufay, Pierre Berthier and Bernard Morignat, 1954. Astronomie stellaire: un nouvel amas globulaire dans la region du centre de la Voie Lactee [Stellar astronomy: A new globular cluster in the region of the center of the Milky Way]. Publications de l'Observatoire de Haute-Provence, Vol. 3, No. 17, 3p [ADS: 1954POHP....3R....D].
• Helen Sawyer Hogg, 1959. Star Clusters. Handbuch der Physik, Volume 53, p. 129- [ADS: 1959HDP....53..129S]. Appendix B, Catalogue of Globular Clusters.
• Sidney van den Bergh and Gretchen L. Hagen, 1975. Uniform survey of clusters in the Southern Milky Way. Astronomical Journal, Vol. 80, No. 1, p. 11-16 (Jan 1975) [ADS: 1975AJ.....80...11V]