32 Andromedae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 41m 07.18458s[1] |
| Declination | +39° 27′ 31.1895″[1] |
| Apparent magnitude (V) | 5.30[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | G8 III[4] |
| B−V color index | 0.891±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.1±0.3[5] km/s |
| Proper motion (μ) | RA: −14.297[1] mas/yr Dec.: −3.274[1] mas/yr |
| Parallax (π) | 9.4654±0.0665 mas[1] |
| Distance | 345 ± 2 ly (105.6 ± 0.7 pc) |
| Absolute magnitude (MV) | 0.12[2] |
| Details[6] | |
| Mass | 2.81±0.12 M☉ |
| Radius | 12.16±0.51 R☉ |
| Luminosity | 90.2±7.2 L☉ |
| Surface gravity (log g) | 2.73±0.04 cgs |
| Temperature | 5,107±37 K |
| Metallicity [Fe/H] | −0.15±0.10 dex |
| Rotational velocity (v sin i) | 1.7[7] km/s |
| Age | 420±40 Myr |
| Other designations | |
| 32 And, BD+38°90, FK5 2043, HD 3817, HIP 3231, HR 175, SAO 54079, PPM 65538[8] | |
| Database references | |
| SIMBAD | data |
32 Andromedae, abbreviated 32 And, is a star in the northern constellation of Andromeda. 32 Andromedae is the Flamsteed designation. It is faintly visible to the naked eye with an apparent visual magnitude is 5.30.[2] The distance to 32 And, as estimated from its annual parallax shift of 9.47 mas,[1] is around 345 light years. It is moving closer to the Earth with a heliocentric radial velocity of −5 km/s.[5]
With an age of 420 million years, this is a red giant star with a stellar classification of G8 III,[4] indicating it has consumed the hydrogen at its core and evolved off the main sequence. It has 2.8 times the mass of the Sun and has expanded to 12 times the Sun's radius. The star is radiating 90 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,107 K.[6]
References
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d 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.
- ^ Stock, Stephan; Reffert, Sabine; Quirrenbach, Andreas (2018). "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search". Astronomy and Astrophysics. 616: A33. arXiv:1805.04094. Bibcode:2018A&A...616A..33S. doi:10.1051/0004-6361/201833111.
- ^ a b Harlan, E. A. (December 1981), "MK classifications for F- and G- type stars. IV.", Astronomical Journal, 86: 1896–1897, Bibcode:1981AJ.....86.1896H, doi:10.1086/113068.
- ^ a b 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.
- ^ a b Reffert, Sabine; et al. (2015), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics, 574: A116, arXiv:1412.4634, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360, S2CID 59334290.
- ^ De Medeiros, J. R.; et al. (November 2000), "Rotation and lithium in single giant stars", Astronomy and Astrophysics, 363: 239–243, arXiv:astro-ph/0010273, Bibcode:2000A&A...363..239D.
- ^ "32 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 27, 2018.