NGC 6638 explained
| NGC 6638 |
| Epoch: | J2000 |
| Class: | VI |
| Constellation: | Sagittarius |
| Dist Ly: | [1] |
| Appmag V: | 9.5 |
| Size V: | 2′ |
| Names: | GCl 95, C 1827-255[2] |
NGC 6638 is a globular cluster in the constellation Sagittarius. It is magnitude 9.5 and diameter 2 arc minutes, class VI. It is a half degree east of Lambda Sagittarii. It is a member of the Milky Way.[3]
The globular cluster was discovered in 1784 by the astronomer William Herschel with his 18.7-inch telescope and the discovery was later entered in the New General Catalogue.
References
- Robert Burnham, Jr, Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 3, p. 1557
External links
Notes and References
- 10.1051/0004-6361/202141596 . Precise distances from OGLE-IV member RR Lyrae stars in six bulge globular clusters . 2022 . 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. . Astronomy & Astrophysics . 657 . A123 . 2110.13943 . 2022A&A...657A.123O . 239998638.
- NGC 6638. 2021-02-11.
- Harris, W.E.. 1996. A Catalog of Parameters for Globular Clusters in the Milky Way. The Astronomical Journal. 112. 1487. 10.1086/118116. 1996AJ....112.1487H.
