NGC 6624
| NGC 6624 | |
|---|---|
arcminutes[1] | |
| Physical characteristics | |
| Metallicity | = -0.56 ± 0.27 |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
NGC 6624 is a globular cluster in the constellation Sagittarius. It was discovered on 24 June 1784 by the astronomer William Herschel. It is given an apparent magnitude of 7.6 to 8.5.[4] Six
low-mass X-ray binary
with an orbital period of only 11.5 minutes.
NGC 6624 is visible as a hazy spot with a small telescope, and appears as a star-like object with binoculars. Its core appears significantly condensed.[1] It is located 0.8 degrees southeast of the star Delta Sagittarii,[5] and is about 1.17 kpc (3.8 kly) from the Galactic Center.[2]
References
- ^ a b
O'Meara, Steve (2007). Steve O'Meara's Herschel 400 Observing Guide. Cambridge: ISBN 978-0-521-85893-9.
- ^ a b
Sofue, Yoshiaki (1998-08-31). The Central Regions of the Galaxy and Galaxies. Netherlands: ISBN 978-0-7923-5061-3.
- ^ "NGC 6624". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-19.
- ^ It is given a diameter of 6 to 8.5 arcminutes, and class VI with stars magnitude 14 and dimmer. It is less than a degree southeast of star Delta Sagittarii.
O'Meara, Stephen James (2007). Deep Sky Companions: Hidden Treasures. Cambridge University Press. p. 452. ISBN 978-1-139-46373-7.
- ISBN 978-1-4419-1776-8.
- Robert Burnham, Jr, Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 3, p. 1557
External links
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