| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas [1] |
| 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
- ^ a b c d e f 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.
- ^ a b c d e f 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.
- ^ a b c d e f g h i j k 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, arXiv: 1611.05041, Bibcode: 2017MNRAS.468.3533E, doi: 10.1093/mnras/stx598, S2CID 119476544.
- ^ Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode: 2009ApJS..180..117A, doi: 10.1088/0067-0049/180/1/117, S2CID 122811461.
- ^ 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, Bibcode: 1979PASP...91...83C, doi: 10.1086/130446.
- ^ a b "3 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-10.
External links
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas [1] |
| 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
- ^ a b c d e f 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.
- ^ a b c d e f 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.
- ^ a b c d e f g h i j k 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, arXiv: 1611.05041, Bibcode: 2017MNRAS.468.3533E, doi: 10.1093/mnras/stx598, S2CID 119476544.
- ^ Abt, Helmut A. (January 2009), "MK Classifications of Spectroscopic Binaries", The Astrophysical Journal Supplement, 180 (1): 117–118, Bibcode: 2009ApJS..180..117A, doi: 10.1088/0067-0049/180/1/117, S2CID 122811461.
- ^ 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, Bibcode: 1979PASP...91...83C, doi: 10.1086/130446.
- ^ a b "3 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-10.
External links
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||