Astronomy:3 Boötis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 46m 43.32359s[1] |
| Declination | +25° 42′ 08.0548″[1] |
| Apparent magnitude (V) | 5.97[2] |
| Characteristics | |
| Evolutionary stage | HG + MS[3] |
| Spectral type | kA9hF6mF6[4] (A7 V: + G5 III:[5] or F2p + G0 IV[3]) |
| B−V color index | 0.523±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | 11.9±0.9[2] km/s |
| Proper motion (μ) | RA: −18.564[1] mas/yr Dec.: −59.093[1] mas/yr |
| Parallax (π) | 10.5064 ± 0.0425[1] mas |
| Distance | 310 ± 1 ly (95.2 ± 0.4 pc) |
| Absolute magnitude (MV) | 1.21[2] |
| Orbit[3] | |
| Period (P) | 36.006 d |
| Eccentricity (e) | 0.543±0.002 |
| Inclination (i) | 74.5±2.0° |
| Semi-amplitude (K1) (primary) | 52.30±0.19 km/s |
| Semi-amplitude (K2) (secondary) | 59.0±0.6 km/s |
| Details | |
| 3 Boo A | |
| Mass | 1.8[3] M☉ |
| Radius | 3.7[3] R☉ |
| Temperature | 5,848[3] K |
| 3 Boo A | |
| Mass | 1.6[3] M☉ |
| Radius | 2.6[3] R☉ |
| Temperature | 6,745[3] K |
| Age | 1.5[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
3 Boötis is a close binary star system in the northern constellation of Boötes,[6] located 310 light years away from the Sun based upon parallax.[1] It can be viewed with the naked eye in excellent seeing conditions as a dim star with an apparent visual magnitude of 5.97.[2] The system is moving further from the Earth with a heliocentric radial velocity of 12 km/s.[2]
This is a double-lined spectroscopic binary system with an orbital period of 36 days and an eccentricity of 0.543. The orbital plane is inclined 74.5° and the system does not form an eclipsing binary. The primary component is an evolving star currently in the Hertzsprung gap. Its companion is a main sequence star. Both members have more mass than the Sun and they are around 1.5 billion years old.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 Eggleton, Peter P.; Yakut, Kadri (July 2017), "Models for 60 double-lined binaries containing giants", Monthly Notices of the Royal Astronomical Society 468 (3): 3533−3556, doi:10.1093/mnras/stx598, Bibcode: 2017MNRAS.468.3533E.
- ↑ Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement 180 (1): 117–118, doi:10.1088/0067-0049/180/1/117, Bibcode: 2009ApJS..180..117A.
- ↑ Cowley, A. P.; Bidelman, W. P. (February 1979), "MK spectral types for some F and G stars", Publications of the Astronomical Society of the Pacific 91: 83–86, doi:10.1086/130446, Bibcode: 1979PASP...91...83C.
- ↑ 6.0 6.1 "3 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=3+Boo.
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