HD 63765
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 07h 47m 49.719s[1] |
| Declination | −54° 15′ 50.93″[1] |
| Apparent magnitude (V) | 8.10 |
| Characteristics | |
| Spectral type | G9V |
| Apparent magnitude (B) | 8.85 |
| Apparent magnitude (J) | 6.768 |
| Apparent magnitude (H) | 6.442 |
| Apparent magnitude (K) | 6.316 |
| B−V color index | 0.75 |
| Astrometry | |
| Radial velocity (Rv) | 22.1 km/s |
| Proper motion (μ) | RA: 147.67 ± 0.66[1] mas/yr Dec.: −279.19 ± 0.71[1] mas/yr |
| Parallax (π) | 30.07 ± 0.56 mas[1] |
| Distance | 108 ± 2 ly (33.3 ± 0.6 pc) |
| Absolute magnitude (MV) | 5.537 |
| Details | |
| Mass | 0.89 M☉ |
| Radius | 0.84 ± 0.06 R☉ |
| Luminosity | 0.544 ± 0.031 L☉ |
| Surface gravity (log g) | 4.46 cgs |
| Temperature | 5430 ± 100 K |
| Metallicity | −0.16 |
| Rotation | 26.7±6.7 d[2] |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 63765 is an 8th-magnitude G-type main sequence star located approximately 106 light years away in the constellation Carina. This star is smaller, cooler, dimmer, and less massive than the Sun. It has a lower iron content than our Sun, with approximately 69% of the Sun's iron-to-hydrogen ratio. In 2009, a gas giant planet was found in orbit around the star.
Planetary system
HD 63765 b is an extrasolar planet which orbits the star. This planet has at least 0.64 times the mass of Jupiter and takes 358 days to orbit the star at a semimajor axis of 0.94 AU.[3] The planet was announced in a press release dating from October 2009.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.64 ± 0.05 MJ | 0.940 ± 0.016 | 358.0 ± 1.0 | 0.240 ± 0.043 | — | — |
See also
References
- ^ a b c d e 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
- ^ Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745−2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441.
- ^ a b Ségransan, D.; et al. (2011). "The HARPS search for southern extra-solar planets. XXIX. Four new planets in orbit around the moderately active dwarfs HD 63765, HD 104067, HD 125595, and HIP 70849". Astronomy and Astrophysics. 535. A54. arXiv:1107.0339. Bibcode:2011A&A...535A..54S. doi:10.1051/0004-6361/200913580.
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