Pyxis globular cluster

The Pyxis globular cluster is a globular cluster in the constellation Pyxis. It lies around 130,000 light-years distant from earth and around 133,000 light-years distant from the centre of the Milky Way—a distance not previously thought to contain globular clusters. It is around 13.3 ± 1.3 billion years old.[1] Discovered in 1995 by astronomer Ronald Weinberger while he was looking for planetary nebulae, it is in the Galactic halo. Irwin and colleagues noted that it appears to lie on the same plane as the Large Magellanic Cloud and raised the possibility that it might be an escaped object from that galaxy.[2]

Pyxis globular cluster
Observation data (J2000 epoch)
ConstellationPyxis
Right ascension09h 07m 57.80s
Declination–37° 13′ 17.0″
Distance130 kly (40 kpc)[1]
Physical characteristics
Metallicity = −1.20±0.15[1] dex
Estimated age13.3±1.3 Gyr[1]
Other designationsPyxis globular cluster
See also: Globular cluster, List of globular clusters

References

edit
  1. ^ a b c d Sarajedini, Ata; Geisler, Doug (1996). "Deep Photometry of the Outer Halo Globular Cluster in PYXIS". Astronomical Journal. 112: 2013. Bibcode:1996AJ....112.2013S. doi:10.1086/118159.
  2. ^ Irwin, M. J.; Demers, Serge; Kunkel, W. E. (1995). "The PYXIS Cluster: A Newly Identified Galactic Globular Cluster". Astrophysical Journal Letters. 453: L21. Bibcode:1995ApJ...453L..21I. doi:10.1086/513301.