66 Andromedae
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 02h 27m 51.77866s[1] |
Declination | +50° 34′ 11.9054″[1] |
Apparent magnitude (V) | 6.16[2] (7.26/7.46)[3] |
Characteristics | |
Spectral type | F4 V[3] |
B−V color index | 0.435 (4.2/4.5)[3] |
Astrometry | |
Radial velocity (Rv) | ±4.3 −5.3[3] km/s |
Proper motion (μ) | RA: ±0.38 +32.23[1] mas/yr Dec.: ±0.35 −90.71[1] mas/yr |
Parallax (π) | 17.69 ± 0.42[1] mas |
Distance | 184 ± 4 ly (57 ± 1 pc) |
Absolute magnitude (MV) | ±0.1/ 3.1±0.1 3.4[3] |
Orbit[3] | |
Period (P) | ±0.000024 d 10.989861 |
Eccentricity (e) | ±0.00057 0.19236 |
Periastron epoch (T) | ±0.006 JD 2,454,007.675 |
Argument of periastron (ω) (secondary) | ±0.18 250.55° |
Semi-amplitude (K1) (primary) | ±0.034 km/s 46.719 |
Semi-amplitude (K2) (secondary) | ±0.038 km/s 48.083 |
Details[3] | |
66 And A | |
Mass | 1.38 M☉ |
Radius | ±0.1 1.7 R☉ |
Luminosity | ±0.5 4.9 L☉ |
Surface gravity (log g) | 4.21[4] cgs |
Temperature | ±225 6,627[4] K |
Metallicity [Fe/H] | ±0.08 −0.14[2] dex |
Rotational velocity (v sin i) | ±1.0 4.2 km/s |
Age | 1.273[4] Gyr |
66 And B | |
Radius | ±0.1 1.5 R☉ |
Luminosity | ±0.4 3.8 L☉ |
Rotational velocity (v sin i) | ±1.0 4.4 km/s |
Other designations | |
Database references | |
SIMBAD | data |
66 Andromedae is a binary star[3] in the constellation Andromeda. The designation is from the star catalogue of English astronomer John Flamsteed, first published in 1712. It has a combined apparent magnitude of 6.16,[2] which is just below the nominal brightness limit of stars that are visible to the naked eye under good seeing conditions. An annual parallax shift of 17.69 mas provides a distance estimate of around 184 light years. This is a double-lined spectroscopic binary system with an orbital period of 11 days and an eccentricity of 0.19.[3] The two components are similar stars with a combined stellar classification of F4 V,[3] matching that of an F-type main sequence star.
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 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.
- 1 2 3 4 5 6 7 8 9 10 Fekel, Francis C.; et al. (April 2010), "New Precision Orbits of Bright Double-lined Spectroscopic Binaries. IV. 66 Andromedae, HR 6979, and HR 9059", The Astronomical Journal, 139 (4): 1579−1591, Bibcode:2010AJ....139.1579F, doi:10.1088/0004-6256/139/4/1579.
- 1 2 3 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
- ↑ "66 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-02.
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