Astronomy:3 Corvi
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h 11m 03.83987s[1] |
| Declination | −23° 36′ 08.7221″[1] |
| Apparent magnitude (V) | 5.45[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A1 V[4] |
| B−V color index | 0.055±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +14.41±1.09[5] km/s |
| Proper motion (μ) | RA: −66.853[1] mas/yr Dec.: −19.826[1] mas/yr |
| Parallax (π) | 17.0039 ± 0.1918[1] mas |
| Distance | 192 ± 2 ly (58.8 ± 0.7 pc) |
| Absolute magnitude (MV) | 1.61[2] |
| Details[5] | |
| Mass | 2.14[6] M☉ |
| Radius | 1.87[7] R☉ |
| Luminosity | 9.55+1.17 −1.04 L☉ |
| Surface gravity (log g) | 4.12±0.22 cgs |
| Temperature | 9,671±329[6] K |
| Metallicity [Fe/H] | +0.17±0.41 dex |
| Rotational velocity (v sin i) | 130 km/s |
| Age | 900+90 −900 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
3 Corvi is a single[9] star in the southern constellation of Corvus, located 192 light years away from the Sun.[1] It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.45.[2] This object is moving further from the Earth with a heliocentric radial velocity of +14 km/s.[5]
This is an A-type main-sequence star[3] with a stellar classification of A1 V.[4] It has 2.14[6] times the mass of the Sun and 1.87[7] times the Sun's radius. The star is around 900 million years old with a high rate of rotation, showing a projected rotational velocity of 130 km/s.[5] It is radiating ten[5] times the luminosity of the Sun from its photosphere at an effective temperature of 9,671 K.[6] An infrared excess has been detected, suggesting that a debris disk with a temperature of 150 K is orbiting 14.7 astronomical unit|AU from the host star.[7]
It was designated Theta Corvi by Johann Elert Bode in his 1801 Uranographia, but it is now no longer used.
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 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 4.0 4.1 Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H.
- ↑ 5.0 5.1 5.2 5.3 5.4 Iglesias, D. et al. (October 2018), "Debris discs with multiple absorption features in metallic lines: circumstellar or interstellar origin?", Monthly Notices of the Royal Astronomical Society 480 (1): 488–520, doi:10.1093/mnras/sty1724, Bibcode: 2018MNRAS.480..488I.
- ↑ 6.0 6.1 6.2 6.3 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D.
- ↑ 7.0 7.1 7.2 Cotten, Tara H.; Song, Inseok (July 2016), "A Comprehensive Census of Nearby Infrared Excess Stars", The Astrophysical Journal Supplement Series 225 (1): 24, doi:10.3847/0067-0049/225/1/15, 15, Bibcode: 2016ApJS..225...15C.
- ↑ "3 Crv". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=3+Crv.
- ↑ De Rosa, R. J. et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D.
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