NGC 6603
| NGC 6603 | |
|---|---|
| 300px
NGC 6603 (bottom right) in Messier 24
|
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| Observation data (J2000.0 epoch) | |
| Right ascension | 18h 18.4m |
| Declination | −18° 25′ |
| Distance | 10 kly |
| Apparent magnitude (V) | 11.4 |
| Apparent dimensions (V) | 5′ |
| Physical characteristics | |
NGC 6603 is an open cluster discovered by John Herschel on July 15, 1830.[1]
Situated within the brightest part of star cloud M24, it is classified by Shapley as type "g". This cluster consists of about 30 stars in a field of about 5 arc minutes in diameter, and is about 9400 light years remote. Thus its linear diameter should be about 14 light years. The hottest stars are about B9 (pointing to an intermediate age of several 100 million years, an estimate of which is not known to the present author), and the brightest of photographic mag 14.
References
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- NGC 6603 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
18h 18.4m 00s, −18° 25′ 00″
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