astro.wikisort.org - Star66 Cancri is a binary star[9] system near the northern border of the zodiac constellation of Cancer, located 474 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.87.[2] The pair are moving closer to the Earth with a heliocentric radial velocity of −13 light years.[6] As of 2003, the magnitude 8.56 companion was located at an angular separation of 4.43″ along a position angle of 134° from the primary.[9]
Binary star system in the constellation of Cancer
66 Cancri
Observation data Epoch J2000.0 Equinox J2000.0 |
Constellation |
Cancer |
Right ascension |
09h 01m 24.13000s[1] |
Declination |
+32° 15′ 08.2666″[1] |
Apparent magnitude (V) |
5.870[2] (5.95 + 8.56)[3] |
Characteristics |
Evolutionary stage |
main sequence[4] |
Spectral type |
A2 V[2] |
B−V color index |
0.088±0.007[5] |
Astrometry |
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Radial velocity (Rv) | −12.8±2.9[6] km/s |
Proper motion (μ) | RA: +0.48[7] mas/yr Dec.: +0.34[7] mas/yr |
Parallax (π) | 6.8850 ± 0.1020 mas[1] |
Distance | 474 ± 7 ly (145 ± 2 pc) |
Absolute magnitude (MV) | 0.14[5] |
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Details |
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Mass | 2.73±0.11[4] M☉ |
Luminosity | 95.7+24.6 −19.5[4] L☉ |
Surface gravity (log g) | 4.0[2][4] cgs |
Temperature | 8,974+230 −224[4] K |
Rotational velocity (v sin i) | 183[4] km/s |
Age | 162[2] Myr |
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Other designations |
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Database references |
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SIMBAD | data |
The brighter member of the system, designated component A, is an A-type main-sequence star with a stellar classification of A2 V.[2] It is around 162[2] million years old with a high rate of spin, showing a projected rotational velocity of 183 km/s.[4] Estimates of the mass of the star range from 1.7[10] up to 2.73[4] times the mass of the Sun. It is radiating 96[4] times the Sun's luminosity from its photosphere at an effective temperature of 8,974 K.[4]
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.
- Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.
- Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
- Zorec, J.; Royer, F.; Asplund, Martin; Cassisi, Santi; Ramirez, Ivan; Melendez, Jorge; Bensby, Thomas; Feltzing, Sofia (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- 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.
- de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- van Leeuwen, F. (November 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.
- "66 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-09.
- Roberts, Lewis C., Jr.; et al. (November 2005), "Adaptive Optics Photometry and Astrometry of Binary Stars", The Astronomical Journal, 130 (5): 2262–2271, Bibcode:2005AJ....130.2262R, doi:10.1086/491586.
- Gullikson, Kevin; et al. (August 2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 13, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065, 40.
Constellation of Cancer |
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Stars | |
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Galaxies | NGC | |
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Other |
- 3C 191
- 3C 212
- 3C 215
- OJ 287
- QSO B0839+187
- DLA0817g
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 Category |
На других языках
- [en] 66 Cancri
[ru] 66 Рака
66 Рака (лат. 66 Cancri) — двойная или кратная звезда, которая находится в созвездии Рака и удалена от Земли на 510 световых лет. Главный компонент, 66 Рака А, — белая звезда класса А, карлик главной последовательности, светимость которого чуть менее в 100 раз превышает солнечную. Масса звезды составляет почти в 4 раза превышает солнечную, радиус в 3.7 раз превышает солнечный. Температура поверхности составляет 9450±50 Кельвинов.
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