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HD 149382: Difference between revisions

Coordinates: Sky map 23h 41m 51.5299s, −05° 59′ 08.726″
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<ref name=gcsrv>{{cite book | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953QB901.W495..... }}</ref>
<ref name=gcsrv>{{cite book | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953QB901.W495..... }}</ref>


<ref name=mnras374_2_664>{{cite journal | author=Cenarro, A. J. | coauthors=''et al.'' | title=Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters | journal=Monthly Notices of the Royal Astronomical Society | volume=374 | issue=2 | pages=664–690 | month=January | year=2007 | doi=10.1111/j.1365-2966.2006.11196.x | bibcode=2007MNRAS.374..664C }}</ref>
<ref name=mnras374_2_664>{{cite journal | author=Cenarro, A. J. | coauthors=''et al.'' | title=Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters | journal=Monthly Notices of the Royal Astronomical Society | volume=374 | issue=2 | pages=664–690 | month=January | year=2007 | doi=10.1111/j.1365-2966.2006.11196.x | bibcode=2007MNRAS.374..664C |arxiv = astro-ph/0611618 }}</ref>


<ref name=aj88_439>{{cite journal | last=Landolt | month=A. U. | title=UBVRI photometric standard stars around the celestial equator | journal=Astronomical Journal | volume=88 | month=March | year=1983 | pages=439–460 | month=March | year=1983 | doi=10.1086/113329 | bibcode=1983AJ.....88..439L }}</ref>
<ref name=aj88_439>{{cite journal | last=Landolt | month=A. U. | title=UBVRI photometric standard stars around the celestial equator | journal=Astronomical Journal | volume=88 | month=March | year=1983 | pages=439–460 | month=March | year=1983 | doi=10.1086/113329 | bibcode=1983AJ.....88..439L }}</ref>

Revision as of 02:54, 28 April 2011

HD 149382

Artist's impression of brown dwarf HD 149382 b (center) in orbit around the star HD 149382 (right).
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 16h 34m 23.3338s[1]
Declination –04° 00′ 52.015″[1]
Apparent magnitude (V) 8.90[2]
Characteristics
Spectral type B5VI[3]
U−B color index –1.167[4]
B−V color index –0.281[4]
Astrometry
Radial velocity (Rv)3[5] km/s
Proper motion (μ) RA: –5.95[1] mas/yr
Dec.: –3.92[1] mas/yr
Parallax (π)13.07 ± 1.29 mas[1]
Distance250 ± 20 ly
(77 ± 8 pc)
Details
Mass0.29−0.53[6] M☉
Radius0.24 R☉
Luminosity82 L☉
Surface gravity (log g)5.80 ± 0.05[6] cgs
Temperature35,500 ± 500[6] K
Metallicity[Fe/H] = −1.30[3]
Rotational velocity (v sin i)4.9 ± 1.4[6] km/s
Other designations
BD-03 3967, HD 149382, HIP 81145, SAO 141250[2]
Database references
SIMBADdata

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.[6] This star has nearly half the mass of the Sun, and is 241 light years away from earth.

The HD 149382 planetary system
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

  1. ^ a b c d e Perryman, M. A. C. (1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)
  2. ^ a b "HD 149382 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-10-06.
  3. ^ a b Cenarro, A. J. (2007). "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters". Monthly Notices of the Royal Astronomical Society. 374 (2): 664–690. arXiv:astro-ph/0611618. Bibcode:2007MNRAS.374..664C. doi:10.1111/j.1365-2966.2006.11196.x. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)CS1 maint: unflagged free DOI (link)
  4. ^ a b Landolt (1983). "UBVRI photometric standard stars around the celestial equator". Astronomical Journal. 88: 439–460. Bibcode:1983AJ.....88..439L. doi:10.1086/113329. {{cite journal}}: Unknown parameter |month= ignored (help)
  5. ^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....
  6. ^ a b c d e Geier, S.; Edelmann, H.; Heber, U.; Morales-Rueda, L. (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): L96–L99. Bibcode:2009ApJ...702L..96G. doi:10.1088/0004-637X/702/1/L96. {{cite journal}}: Unknown parameter |month= ignored (help)CS1 maint: multiple names: authors list (link)
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