35 Comae Berenices
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12h 53m 17.74703s[1] |
| Declination | +21° 14′ 41.8092″[1] |
| Apparent magnitude (V) | 4.93[2] |
| Characteristics | |
| Spectral type | G5 III + F:[2] |
| U−B color index | 0.65[3] |
| B−V color index | 0.90[3] |
| Astrometry | |
| Radial velocity (Rv) | −6.091±0.075[4] km/s |
| Proper motion (μ) | RA: −37.66[1] mas/yr Dec.: −30.14[1] mas/yr |
| Parallax (π) | 11.52 ± 0.87 mas[1] |
| Distance | 280 ± 20 ly (87 ± 7 pc) |
| Orbit[5] | |
| Period (P) | 539.4±95.4 yr |
| Semi-major axis (a) | 1.405±0.046″ |
| Eccentricity (e) | 0.208±0.100 |
| Inclination (i) | 28.4±13.4° |
| Longitude of the node (Ω) | 238.7±2.7° |
| Periastron epoch (T) | 1949.4±7.9 |
| Argument of periastron (ω) (secondary) | 251.6±7.3° |
| Other designations | |
| Database references | |
| SIMBAD | data |
35 Comae Berenices is a multiple star system in the northern constellation of Coma Berenices, located about 6° from the north galactic pole. It is faintly visible to the naked eye with an apparent visual magnitude of 4.93.[2] Based upon parallax measurements, it is located around 280 light years from the Sun.[1] The system is moving closer to the Earth with a heliocentric radial velocity of −6 km/s.[4]
This was found to be a wide binary by Struve in 1828,[3] but it has completed less than half an orbit since then and the orbital elements remain poorly constrained. It has an orbital period of 539±95 years and an eccentricity of 0.2±0.1.[5] The pair have been resolved into stellar classifications of an evolved G-type giant primary of class G5 III and an F-type secondary,[2] most likely main sequence with a class of F1 V.[3] The primary component is a spectroscopic binary[3] with a period of 7.9624 ± 0.0117 years and an eccentricity of 0.63.[4] A fourth component, 35 Com C, is located 29″ from the primary and may have a physical association.[3]
References
[edit]- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b c d e f Griffin, R. F.; et al. (March 1988), "The giant spectroscopic binary 35 Comae", Publications of the Astronomical Society of the Pacific, 100: 358–361, Bibcode:1988PASP..100..358G, doi:10.1086/132177.
- ^ a b c Halbwachs, J.-L.; et al. (May 2012), "Double stars with wide separations in the AGK3 - I. Components that are themselves spectroscopic binaries", Monthly Notices of the Royal Astronomical Society, 422 (1): 14–24, Bibcode:2012MNRAS.422...14H, doi:10.1111/j.1365-2966.2012.20308.x.
- ^ a b Drummond, Jack D. (March 2014), "Binary Stars Observed with Adaptive Optics at the Starfire Optical Range", The Astronomical Journal, 147 (3): 10, Bibcode:2014AJ....147...65D, doi:10.1088/0004-6256/147/3/65, 65.
- ^ "35 Com". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-01-05.
