Astronomy:IC 4665
From HandWiki
Short description: Open cluster in the constellation Opiuchus
| IC 4665 | |
|---|---|
 Cluster IC 4665 with star Beta Ophiuchi below | |
| Observation data (J2000 epoch) | |
| Constellation | Ophiuchus |
| Right ascension | 17h 46m 18s[1] |
| Declination | +05° 43′ 00″[1] |
| Distance | 1.4 kly (352 pc) |
| Apparent magnitude (V) | 4.2[1] |
| Apparent dimensions (V) | 45′x45′ |
| Physical characteristics | |
| Other designations | Cr 349, Mel 179 [1] |
IC 4665 (Collinder 349 / Melotte 179) is an open cluster in the constellation Ophiuchus. It was discovered by Philippe Loys de Chéseaux in 1745. The cluster began to develop less than 40 million years ago, and lies about 1,400 light years away from Earth. It is easily visible in the smallest of telescopes and also with binoculars. From a sufficiently dark place it is also visible to the naked eye. It is one of the brightest clusters not to be cataloged by Charles Messier or William Herschel, probably because it is so loose and coarse.
References
- ↑ 1.0 1.1 1.2 1.3 "SIMBAD Astronomical Database". Results for NGC 6369. http://simbad.u-strasbg.fr/Simbad. Retrieved 2007-04-17.
External links
- IC 4665 @ SEDS IC objects pages
- IC 4665 www.univie.ac.at
- IC 4665 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- X-Ray Activity in the Open Cluster IC 4665 National Aeronautics and Space Administration
Coordinates: 
17h 46m 18s, +05° 43′ 00″
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