Astronomy:32 Boötis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 41m 43.52071s[1] |
| Declination | +11° 39′ 38.3820″[1] |
| Apparent magnitude (V) | 5.55[2] |
| Characteristics | |
| Spectral type | G8 III[3] |
| B−V color index | 0.941±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | −23.3±0.3[2] km/s |
| Proper motion (μ) | RA: –159.787[1] mas/yr Dec.: −112.732[1] mas/yr |
| Parallax (π) | 9.0120 ± 0.2578[1] mas |
| Distance | 360 ± 10 ly (111 ± 3 pc) |
| Absolute magnitude (MV) | 0.09[2] |
| Details | |
| Mass | 2.15[4] M☉ |
| Radius | 12.06+0.09 −0.24[1] R☉ |
| Luminosity | 79.14±2.57[1] L☉ |
| Surface gravity (log g) | 2.6±0.3[5] cgs |
| Temperature | 4,957.5+50.0 −17.5[1] K |
| Metallicity [Fe/H] | −23.3±0.3[2] dex |
| Rotational velocity (v sin i) | 2.6[6] km/s |
| Age | 1.46[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
32 Boötis is a single[8] star in the northern constellation of Boötes,[7] located 360 light years away from the Sun.[1] It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 5.55.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.[2] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.195 arc seconds per annum.[9]
This is an aging giant star with a stellar classification of G8 III.[3] It is most likely on the horizontal branch and is a candidate red clump giant.[5] The star is an estimated 1.46[4] billion years old with 2.15[4] times the mass of the Sun. With the hydrogen at its core exhausted, it has expanded to 12[1] times the Sun's radius. 32 Boötis is radiating 79[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4958 K.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 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 2.6 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 Harlan, E. A.; Taylor, D. C. (March 1970), "MK classification for F- and G-type stars. II", Astronomical Journal 75 (2): 165–166, doi:10.1086/110956, Bibcode: 1970AJ.....75..165H
- ↑ 4.0 4.1 4.2 4.3 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal 150 (3): 88, doi:10.1088/0004-6256/150/3/88, Bibcode: 2015AJ....150...88L.
- ↑ 5.0 5.1 Afşar, M. et al. (July 2012), "Chemical Compositions of Thin-disk, High-metallicity Red Horizontal-branch Field Stars", The Astronomical Journal 144 (1): 20, doi:10.1088/0004-6256/144/1/20, 20, Bibcode: 2012AJ....144...20A.
- ↑ De Medeiros, J. R. et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics 363: 239–243, Bibcode: 2000A&A...363..239D.
- ↑ 7.0 7.1 "32 Boo". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=32+Boo.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L.
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