HD 149382: Difference between revisions
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'''HD 149382''' is a [[B-type]] [[subdwarf star]] approximately 242 [[light-year]]s away from [[Sun]] in the [[constellation]] of [[Ophiuchus (constellation)|Ophiuchus]]. In 2009, a [[substellar]] companion (even a [[superjovian]] [[extrasolar planet|planet]]) was announced orbiting the star.<ref name="Geier et al."> {{cite journal | url=http://fr.arxiv.org/abs/0908.1025| author=Geier et al.| title=Discovery of a close substellar companion to the hot subdwarf star HD 149382 - The decisive influence of substellar objects on late stellar evolution|journal=[[The Astrophysical Journal Letters]]|volume=702|issue=1| pages= |
'''HD 149382''' is a [[B-type]] [[subdwarf star]] approximately 242 [[light-year]]s away from [[Sun]] in the [[constellation]] of [[Ophiuchus (constellation)|Ophiuchus]]. In 2009, a [[substellar]] companion (even a [[superjovian]] [[extrasolar planet|planet]]) was announced orbiting the star.<ref name="Geier et al."> {{cite journal | url=http://fr.arxiv.org/abs/0908.1025| author=Geier et al.| title=Discovery of a close substellar companion to the hot subdwarf star HD 149382 - The decisive influence of substellar objects on late stellar evolution|journal=[[The Astrophysical Journal Letters]]|volume=702|issue=1| pages=96–99 | year=2009 | bibcode=2009ApJ...702L..96G}}</ref>. This star has nearly half the mass of ''SOL'', and is 241 light years away from earth. |
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Revision as of 14:59, 14 April 2010
 Brown dwarf HD 149382 b. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 34m 23.3338s |
| Declination | –04° 00′ 52.015″ |
| Apparent magnitude (V) | 8.9 |
| Characteristics | |
| Spectral type | B5VI |
| Astrometry | |
| Distance | 241.2 ly (74±8 pc) |
| Details | |
| Mass | 0.47 M☉ |
| Radius | 0.24 R☉ |
| Luminosity | 82 L☉ |
| Temperature | 35,500 K |
| Other designations | |
ALS 9317, HD 149382, HIP 81145, SAO 141250 | |
| Database references | |
| SIMBAD | data |
HD 149382 is a B-type subdwarf star approximately 242 light-years away from Sun in the constellation of Ophiuchus. In 2009, a substellar companion (even a superjovian planet) was announced orbiting the star.[1]. This star has nearly half the mass of SOL, and is 241 light years away from earth.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >8-23 MJ | 0.02343 | 2.391 | 0 | 39±13° | — |
See also
References
- ^ Geier; et al. (2009). "Discovery of a close substellar companion to the hot subdwarf star HD 149382 - The decisive influence of substellar objects on late stellar evolution". The Astrophysical Journal Letters. 702 (1): 96–99. Bibcode:2009ApJ...702L..96G.
{{cite journal}}: Explicit use of et al. in:|author=(help)
External links
- http://exoplanet.eu/planet.php?p1=HD%20149382&p2=b
- http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD%20149382b
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