HD 129445
HD 129445 is a G type star found in the Circinus constellation located approximately 210 light-years away[1] from the Earth. The star has been under the Magellan Planet Search Program observation due to its absolute visual magnitude and metallicity. The Magellan program conducted 17 doppler velocity tests which spans a full orbital period. The results led the program to detect a planet dubbed HD 129445 b whose readings was accurate to the Keplerian orbital model.[2][3][4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.6 ± 0.6 MJ | 2.9 ± 0.2 | 1840 ± 55 | 0.70 ± 0.10 | — | — |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Circinus |
| Right ascension | 14h 46m 03.064s[1] |
| Declination | –68° 45′ 45.89″[1] |
| Apparent magnitude (V) | 8.8 |
| Characteristics | |
| Spectral type | G6V |
| Apparent magnitude (B) | 9.6 |
| Apparent magnitude (J) | 7.531 |
| Apparent magnitude (H) | 7.243 |
| Apparent magnitude (K) | 7.167 |
| B−V color index | 0.8 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | +7.5 km/s |
| Proper motion (μ) | RA: –198.45 ± 0.82[1] mas/yr Dec.: –58.57 ± 1.02[1] mas/yr |
| Parallax (π) | 15.26 ± 1.10[1] mas |
| Distance | 210 ± 20 ly (66 ± 5 pc) |
| Absolute magnitude (MV) | 4.7 |
| Details | |
| Mass | 0.99 M☉ |
| Metallicity | 0.25 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
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. S2CID 18759600.Vizier catalog entry
- Arriagada, Pamela; et al. (2010). "Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program". The Astrophysical Journal. 711 (2): 1229–35. arXiv:1001.4093. Bibcode:2010ApJ...711.1229A. doi:10.1088/0004-637X/711/2/1229. S2CID 118682009.
- "Estrella del Anfitrión: HD 129445". Planet Quest. Archived from the original on 2010-07-04. Retrieved 2010-02-12.
- "HD 129445". Exoplanets. Archived from the original on 2010-03-17. Retrieved 2010-02-12.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.