Summary
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 9.8 mas,[1] is around 331 light years. It is moving closer to the Earth with a heliocentric radial velocity of −5 km/s.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 41m 07.18431s[1] |
| Declination | +39° 27′ 31.1886″[1] |
| Apparent magnitude (V) | 5.30[2] |
| Characteristics | |
| Evolutionary stage | giant star |
| Spectral type | G8 III[3] |
| B−V color index | 0.891±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.1±0.3[4] km/s |
| Proper motion (μ) | RA: −14.083[1] mas/yr Dec.: −3.218[1] mas/yr |
| Parallax (π) | 9.8414 ± 0.1485 mas[1] |
| Distance | 331 ± 5 ly (102 ± 2 pc) |
| Absolute magnitude (MV) | 0.12[2] |
| Details[5] | |
| 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[6] km/s |
| Age | 420±40 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
With an age of 420 million years, this is a red giant star with a stellar classification of G8 III,[3] 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.[5]
References edit
- ^ a b c d e f 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.
- ^ 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.
- ^ 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.
External links edit
- Image 26 Andromedae