HD 107148
HD 107148 is an 8th magnitude primary of the binary star system located approximately 161 light years away in the constellation of Virgo. It is a yellow dwarf with a luminosity 1.41 times the Sun. It is twice as enriched with heavy elements than the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 19m 13.4909s[1] |
| Declination | −03° 19′ 11.242″[1] |
| Apparent magnitude (V) | 8.02 |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: −54.787±0.108[1] mas/yr Dec.: −47.395±0.064[1] mas/yr |
| Parallax (π) | 20.2077 ± 0.0470[1] mas |
| Distance | 161.4 ± 0.4 ly (49.5 ± 0.1 pc) |
| Orbit[2] | |
| Primary | HD 107148 |
| Companion | HD 107148 B |
| Semi-major axis (a) | 35" (1790 AU) |
| Details[3] | |
| HD 107148 | |
| Mass | 1.1±0.1 M☉ |
| Radius | 1.15±0.03 R☉ |
| Luminosity | 1.34±0.05 L☉ |
| Surface gravity (log g) | 4.35±0.03 cgs |
| Temperature | 5789±36 K |
| Metallicity [Fe/H] | 0.33±0.09[4] dex |
| Rotational velocity (v sin i) | 1.22±0.20[4] km/s |
| Age | 4±1 Gyr |
| HD 107148 B | |
| Mass | 0.6[2] M☉ |
| Temperature | 6250±250[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
In 2012, a comoving white dwarf stellar companion HD 107148 B was detected[6] at projected separation of 1790 AU, and was confirmed in 2014. It is a 0.6 M☉ remnant core of the former 1.8±0.2 M☉ star.[2]
Planetary system
In 2006, a discovery of Saturn-mass planet was announced.[7] HD 107148 should not be confused with HD 108147, which also has an extrasolar planet located in Crux constellation discovered in 2000.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.210 ± 0.036 MJ | 0.269 ± 0.016 | 48.056 ± 0.057 | 0.05 ± 0.17 | — | — |
See also
- List of extrasolar planets
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- New wide stellar companions of exoplanet host stars
- Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2015), "Age consistency between exoplanet hosts and field stars", Astronomy & Astrophysics, 585: A5, arXiv:1511.01744, doi:10.1051/0004-6361/201527297, S2CID 53971692
- Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES) I. Code description and dwarf stars catalogue
- "HD 107148". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-12.
- Wide companions to Hipparcos stars within 67 pc of the Sun
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
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