64 Andromedae
64 Andromedae, abbreviated 64 And, is a single[6] star in the northern constellation of Andromeda. With a spectral type G8III, it is a deep-yellow coloured G-type giant approximately 419 light years from Earth with an apparent magnitude of 5.19.[1] The star is moving closer to the Earth with a heliocentric radial velocity of –13 km/s.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 24m 24.91594s[1] |
| Declination | +50° 00′ 23.5619″[1] |
| Apparent magnitude (V) | 5.19[2] |
| Characteristics | |
| Spectral type | G8III[2] |
| U−B color index | 1.74[2] |
| B−V color index | 0.976[3] |
| Astrometry | |
| Radial velocity (Rv) | –13.34[1] km/s |
| Proper motion (μ) | RA: +24.618±0.272[1] mas/yr Dec.: −36.335±0.262[1] mas/yr |
| Parallax (π) | 7.7770 ± 0.1296 mas[1] |
| Distance | 419 ± 7 ly (129 ± 2 pc) |
| Absolute magnitude (MV) | −0.25[4] |
| Details | |
| Mass | 3.12±0.19[5] M☉ |
| Radius | 15.90±0.56[5] R☉ |
| Luminosity | 135.6±8.8[5] L☉ |
| Surface gravity (log g) | 2.55±0.05[5] cgs |
| Temperature | 4,944±33[5] K |
| Metallicity [Fe/H] | −0.03±0.10[5] dex |
| Rotational velocity (v sin i) | 0.69[3] km/s |
| Age | 350±60[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This star is estimated to be 350[5] million years old with a negligible rotation rate, showing a projected rotational velocity of 0.69 km/s.[3] It has a little more than 3[5] times the mass of the Sun and has expanded to 16[5] times the Sun's radius. 64 And is radiating 136[5] times the luminosity of the Sun from its enlarger photosphere at an effective temperature of 4,944 [5]
Position and chosen constellation edit
As to the faint triangle and context in which the star figures see 63 Andromedae.
References edit
- ^ a b c d e f g h 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 "64 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 5, 2018.
- ^ a b c Hekker, S.; Meléndez, J. (December 2007), "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters", Astronomy & Astrophysics, 475 (3): 1003–1009, arXiv:0709.1145, Bibcode:2007A&A...475.1003H, doi:10.1051/0004-6361:20078233, S2CID 10436552.
- ^ 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 c d e f g h i j k l Reffert, S.; Bergmann, C.; Quirrenbach, A.; Trifonov, T.; Künstler, A. (2016), "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity", Astronomy & Astrophysics, 574: 13, arXiv:1608.00963, Bibcode:2015A&A...574A.116R, doi:10.1051/0004-6361/201322360, hdl:10722/215277, S2CID 59334290, A116.
- ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.