NGC 6717

NGC 6717
Hubble Space Telescope image of NGC 6717
Observation data (J2000 epoch)
ConstellationSagittarius
Right ascension18h 55m 06.04s[1]
Declination−22° 42′ 05.3″[1]
Distance23.8 ± 1.6 kly (7.3 ± 0.5 kpc)[2]
Apparent magnitude (V)+9.28[3]
Physical characteristics
Other designationsNGC 6717, Cr 395, ESO 523-14, GCl 105[1]
See also: Globular cluster, List of globular clusters

NGC 6717 (also known as Palomar 9) is a globular cluster in the constellation Sagittarius, and is a member of the Palomar Globular Clusters group. Palomar 9 was discovered by William Herschel on August 7, 1784. It is located about 7,300 parsecs away from Earth.[2]

The globular cluster, which has an apparent magnitude of 9.28 and diameter of 9.9 arcminutes, is located just south of the star ν2 Sagittarii. The bright star region on the north-eastern edge has the separate designation IC 4802.

References

  1. ^ a b c "NGC 6717". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 30 December 2016.
  2. ^ a b Oliveira, R. A. P.; Ortolani, S.; Barbuy, B.; Kerber, L. O.; Maia, F. F. S.; Bica, E.; Cassisi, S.; Souza, S. O.; Pérez-Villegas, A. (2022). "Precise distances from OGLE-IV member RR Lyrae stars in six bulge globular clusters". Astronomy & Astrophysics. 657: A123. arXiv:2110.13943. Bibcode:2022A&A...657A.123O. doi:10.1051/0004-6361/202141596. S2CID 239998638.
  3. ^ Frommert, Hartmut. "NGC 6717, Palomar 9". seds.org. Retrieved 30 December 2016.


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