NGC 1502
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| AladinLite | |
| Constellation | giraffe |
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Position equinox : J2000.0 |
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|---|---|
| Right ascension | 04 h 07 m 49.3 s |
| declination | + 62 ° 19 ′ 54 ″ |
| Appearance
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| classification | II 3 p |
| Brightness (visual) | 6.9 likes |
| Brightness (B-band) | 7.47 likes |
| Angular expansion | 20 ' |
| Redness ( excess color E (BV)) | 0.881 |
| Physical data
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| Affiliation | Milky Way |
| distance | approx. 2700 ly (821 pc ) |
| history | |
| Discovered by | William Herschel |
| Discovery time | November 3, 1787 |
| Catalog names | |
| NGC 1502 • C 0403 + 622 • OCl 383 • Cr 45 • Lund 124 • GC 802 • H VII-47 • | |
NGC 1502 is the name of an open star cluster in the constellation Giraffe . NGC 1502 has an angular extent of 20.0 'and an apparent magnitude of 6.9 mag. Four with magnitudes of 7 to 8 mag clearly more conspicuous O and B stars dominate around 45 other cluster members with magnitudes of 9 to 11 mag. NGC 1502 is at the end of the eye-catching asterism Kaskade .
The optical double star ADS 2984 is located in the center of the star cluster. Its components are about 18 arc seconds apart. Both are unresolved pairs of hot, massive stars and can only be recognized as such by spectroscopy . Together they make the brightest star system in NGC 1502. The age of the star cluster is given as about ten million years. NGC 1502 is a good 3,000 light years away from us and only about six light years in size.
NGC 1502 was discovered on November 3, 1787 by the German-British astronomer Friedrich Wilhelm Herschel .
Web links
- Image from NGC 1502
- NGC 1502 at the end of Kemble's Cascade Astronomy Picture of the Day , 2010-01-28
Individual evidence
- ↑ a b NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c SEDS: NGC 1502
- ↑ SIMBAD database
- ↑ WEBDA
- ^ Sinnott, Roger W .: Millennium star atlas: an all-sky atlas comprising one million stars to visual magnitude eleven from the Hipparcos and Tycho catalogs and ten thousand nonstellar objects. Sky Pub., 1997, accessed April 26, 2020 .
- ^ Klaus-Peter Schröder: NGC 1502: a compact cluster of young stars; in: Stars and Space, February 2013, p. 70 f.
- ↑ Seligman