Palomar 6
| Palomar 6 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Class | XI |
| Constellation | Ophiuchus |
| Right ascension | 17h 43m 42.20s[1] |
| Declination | −26° 13′ 21.0″[1] |
| Distance | 25.02 ± 0.62 kly (7.67 ± 0.19 kpc)[2] |
| Physical characteristics | |
| Mass | 2.28×105[3] M☉ |
| Metallicity | = –0.91[3] dex |
| Estimated age | 12.4 ± 0.9 Gyr[2] |
| Other designations | ESO 520-21, GCl 75, 1740-262[1] |
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Palomar 6 is a loose globular cluster in the constellation Ophiuchus that belongs to the Milky Way galaxy. It is a member of the Palomar Globular Clusters group and is located about 25,000 light-years (7,700 parsecs) away from the Sun.[2] It formed in what would become the bulge of the Milky Way and is similar to other old-bulge globular clusters such as Messier 62, NGC 6522, NGC 6558, and Haute-Provence 1.[2]
First discovered on the National Geographic Society – Palomar Observatory Sky Survey plates by Robert G. Harrington and Fritz Zwicky,[4] it was catalogued as a globular cluster, and was thought to be one of four globulars known to contain a planetary nebula. A paper published in 2024, however, showed that the proper motion of the central star of the nebula JaFu 1 differs from that of the cluster with high statistical significance, thus confirming that the nebula is not located within the cluster.[5]
References
[edit]- ^ a b c "SIMBAD Astronomical Database". Results for Palomar 6. Retrieved 2009-10-04.
- ^ a b c d Souza, S. O.; Valentini, M.; Barbuy, B.; Pérez-Villegas, A.; Chiappini, C.; Ortolani, S.; Nardiello, D.; Dias, B.; Anders, F.; Bica, E. (2021). "Photo-chemo-dynamical analysis and the origin of the bulge globular cluster Palomar 6". Astronomy & Astrophysics. 656: A78. arXiv:2109.04483. Bibcode:2021A&A...656A..78S. doi:10.1051/0004-6361/202141768. S2CID 237485386.
- ^ a b Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal, 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51, S2CID 118649860.
- ^ Abell, George O. (1955). "Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey". Publications of the Astronomical Society of the Pacific. 67 (397): 258. Bibcode:1955PASP...67..258A. doi:10.1086/126815.
- ^ Bond, Howard E.; Bellini, Andrea; Sahu, Kailash C. (2024-09-17). "Testing Cluster Membership of Planetary Nebulae with High-precision Proper Motions. I. HST Observations of JaFu 1 Near the Globular Cluster Palomar 6". The Astronomical Journal. 168 (4): 160. arXiv:2407.18135. Bibcode:2024AJ....168..160B. doi:10.3847/1538-3881/ad67d4. ISSN 1538-3881.
External links
[edit]
Media related to Palomar 6 at Wikimedia Commons- Simbad reference data
- SEDS: Palomar 6, Capricornus Dwarf
- Palomar 6 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NASA Astronomy Picture of the Day: Palomar 6: Globular Star Cluster (19 October 2021)
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