Astronomy:Pi1 Columbae
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Short description: Star in the constellation Columba
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | 06h 06m 41.03304s[1] |
| Declination | −42° 17′ 55.5846″[1] |
| Apparent magnitude (V) | 6.13[2] |
| Characteristics | |
| Spectral type | A2mA5-A9[3] |
| U−B color index | +0.11[2] |
| B−V color index | +0.25[2] |
| Astrometry | |
| Radial velocity (Rv) | 2.0±4.3[4] km/s |
| Proper motion (μ) | RA: −26.957[1] mas/yr Dec.: −5.880[1] mas/yr |
| Parallax (π) | 11.6365 ± 0.1653[1] mas |
| Distance | 280 ± 4 ly (86 ± 1 pc) |
| Absolute magnitude (MV) | +1.55[5] |
| Details | |
| Radius | 2.49+0.15 −0.11[1] R☉ |
| Luminosity | 20.237+0.23 −0.33[1] L☉ |
| Temperature | 7,765+171 −228[1] K |
| Rotational velocity (v sin i) | 70[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Pi1 Columbae, Latinized from π1 Columbae, is a star in the southern constellation of Columba. With an apparent visual magnitude of 6.13,[2] it is a dim, white-hued star that is near the limit of visibility for the naked eye. It is located approximately 280 light years from the Sun based on parallax,[1] and has an absolute magnitude of +1.55.[5]
This is an Am star with a stellar classification of A2mA5-A9.[3] It has 2.5 times the Sun's radius and shines with 20 times the luminosity of the Sun at an effective temperature of 7,765 K.[1] The star is spinning with a projected rotational velocity of 70 km/s.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 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 Feinstein, A. (1974), "Photoelectric UBVRI observations of AM stars", Astronomical Journal 79: 1290, doi:10.1086/111675, Bibcode: 1974AJ.....79.1290F.
- ↑ 3.0 3.1 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 Levato, O. H. (August 1972), "Rotational Velocities and Spectral Types of Some A-Type Stars", Publications of the Astronomical Society of the Pacific 84 (500): 584, doi:10.1086/129336, Bibcode: 1972PASP...84..584L
- ↑ "pi01 Col". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=pi01+Col.
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