| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12 16 30.12328 |
| Declination | +33° 03′ 41.4198″ |
| Apparent magnitude (V) | 4.99 |
| Characteristics | |
| Spectral type | K0.5 III–IIIb |
| B−V color index | 1.140±0.002 |
| Astrometry | |
| Radial velocity (Rv) | −40.4±0.3 km/s |
| Proper motion (μ) | RA: −41.979 mas/yr Dec.: −105.115 mas/yr |
| Parallax (π) | 10.2417 ± 0.2354 mas |
| Distance | 318 ± 7 ly (98 ± 2 pc) |
| Absolute magnitude (MV) | 0.06 |
| Orbit | |
| Period (P) | 3.598 years (1,314.3 d) |
| Eccentricity (e) | 0.43 |
| Longitude of the node (Ω) | 303.6° |
| Periastron epoch (T) | 2441468.5 JD |
| Semi-amplitude (K1) (primary) | 6.5 km/s |
| Details | |
| Mass | 1.85±0.14 M☉ |
| Radius | 16.79±0.79 R☉ |
| Luminosity | 112 L☉ |
| Surface gravity (log g) | 2.48±0.10 cgs |
| Temperature | 4,581±28 K |
| Metallicity | −0.12±0.05 dex |
| Rotational velocity (v sin i) | 0.9 km/s |
| Age | 1.57±0.32 Gyr |
| Other designations | |
| BD+33° 2213, FK5 2983, HD 106760, HIP 59856, HR 4668, SAO 62928 | |
| Database references | |
| SIMBAD | data |
HD 106760 is a single-lined spectroscopic binary star system in the northern constellation of Coma Berenices. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.99. The system is located around 318 light years away, as determined from its annual parallax shift of 10.2417 mas. It is moving closer with a heliocentric radial velocity of −40 km/s, and is expected to come as close as 259 ly in about 772,000 years.
The variable radial velocity of HD 106760 was announced by W. W. Campbell of Lick Observatory in 1922, indicating the binary nature of this system. A preliminary orbit was determined by Mount Wilson Observatory astronomer W. H. Christie in 1936, then refined by English astronomer R. F. Griffin in 1984. The components of this system orbit each other with a period of 3.6 years and an eccentricity of 0.43.
The visible component has a stellar classification of K0.5 III–IIIb, indicating it is an evolved K-type giant star. It is around 1.6 billion years old with 1.9 times the mass of the Sun and has expanded to 17 times the Sun's radius. The star is radiating 112 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,581 K.
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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373
- ^ Pourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics, 424: 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
- ^ Maldonado, J.; Villaver, E. (April 2016), "Evolved stars and the origin of abundance trends in planet hosts", Astronomy & Astrophysics, 588: 11, arXiv:1602.00835, Bibcode:2016A&A...588A..98M, doi:10.1051/0004-6361/201527883, S2CID 119212009, A98.
- ^ Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209, S2CID 121883397.
- "HD 106760". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-13.
- ^ Griffin, R. F. (June 1984), "Spectroscopic binaries near the North Galactic Pole. X - HR 4668", Journal of Astrophysics and Astronomy, 5: 181−185, Bibcode:1984JApA....5..181G, doi:10.1007/BF02714990, S2CID 124007568.
