HD 153950
HD 153950 is an F-type main sequence star that is hotter and larger than our Sun. It is located in the southern constellation Scorpius. It is a 7th magnitude star at a distance of about 188 light years from Earth.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 04m 30.870s[1] |
| Declination | −43° 18′ 35.18″[1] |
| Apparent magnitude (V) | 7.38 |
| Characteristics | |
| Spectral type | F8V[2] |
| Apparent magnitude (B) | ~7.90[2] |
| Apparent magnitude (J) | 6.313 ±0.018[2] |
| Apparent magnitude (H) | 6.078 ±0.034[2] |
| Apparent magnitude (K) | 6.006 ±0.017[2] |
| Astrometry | |
| Radial velocity (Rv) | 30.7 ± 2[2] km/s |
| Proper motion (μ) | RA: 109.69 ± 1.08[1] mas/yr Dec.: −142.15 ± 0.68[1] mas/yr |
| Parallax (π) | 20.19 ± 0.70[1] mas |
| Distance | 162 ± 6 ly (50 ± 2 pc) |
| Details | |
| Mass | 1.12 ± 0.03 M☉ |
| Radius | 1.34 R☉ |
| Temperature | 6076 ± 13 K |
| Metallicity | -0.01 ±0.01 |
| Age | (4.3 ± 1) × 109 years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
The star HD 153950 is named Rapeto. The name was selected in the NameExoWorlds campaign by Madagascar, during the 100th anniversary of the IAU. Rapeto is a giant creature from Malagasy tales.[3][4]
Planetary system
In October 2008, an exoplanet of the star was discovered. This object was detected using the radial velocity method by search programs conducted using the HARPS spectrograph.[5] It has a mass roughly 2.73 times of Jupiter and potentially orbits in the habitable zone of its parent star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.73 ± 0.05 MJ | 1.28 ± 0.01 | 499.4 ± 3.6 | 0.34 ± 0.021 | — | — |
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See also
- List of extrasolar planets
References
- van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- "SIMBAD query result: NLTT 44077 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-11.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- Moutou, C.; et al. (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950". Astronomy and Astrophysics. 496 (2): 513–519. arXiv:0810.4662. Bibcode:2009A&A...496..513M. doi:10.1051/0004-6361:200810941.
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