Astronomy:6 Persei
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 13m 36.34084s[1] |
| Declination | +51° 03′ 56.8222″[1] |
| Apparent magnitude (V) | 5.29[2] |
| Characteristics | |
| Spectral type | G8.5 IIIb Fe-2[2] |
| B−V color index | 0.926[3] |
| Astrometry | |
| Radial velocity (Rv) | +41.82±0.27[4] km/s |
| Proper motion (μ) | RA: +344.397[1] mas/yr Dec.: −164.853[1] mas/yr |
| Parallax (π) | 17.8901 ± 0.0943[1] mas |
| Distance | 182.3 ± 1.0 ly (55.9 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.25±0.07[5] |
| Orbit[5] | |
| Period (P) | 1,576.23±0.04 d |
| Eccentricity (e) | 0.8828±0.0007 |
| Inclination (i) | 104° |
| Periastron epoch (T) | 2,450,307.31±0.12 JD |
| Argument of periastron (ω) (secondary) | 266.4±0.3° |
| Semi-amplitude (K1) (primary) | 19.82±0.06 km/s |
| Details[3] | |
| Mass | 1.5 M☉ |
| Radius | 7 R☉ |
| Luminosity | 26.3 L☉ |
| Surface gravity (log g) | 3.0 cgs |
| Temperature | 4,920 K |
| Metallicity [Fe/H] | −0.60 dex |
| Rotational velocity (v sin i) | 0.0 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
6 Persei is a binary star[7] system in the northern constellation of Andromeda.[8] It is faintly visible to the naked eye with an apparent visual magnitude of 5.29.[2] The system is located 182 light years from Earth, as determined from its annual parallax shift of 17.9 mas.[1] It is moving further away with a heliocentric radial velocity of +42 km/s.[4] The system has a relatively high rate of proper motion, traversing the celestial sphere at the rate of 0.386 arcsecond/year.[9]
This is a single-lined spectroscopic binary with an orbital period of 4.3155 yr and an eccentricity of 0.88. The a sin i value for the primary is 201.8±0.9 Gm, where a is the semimajor axis and i is the orbital inclination. The inclination is estimated to be 104°.[5]
The visible component is an evolved giant star with a stellar classification of G8.5 IIIb Fe-2,[2] where the suffix notation indicates an underabundance of iron in the spectrum. It has 1.5 times the mass of the Sun and has expanded to 7 times the Sun's radius. The star is radiating 26 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,920 K.[3] It has a magnitude 10.49 visual companion at an angular separation of 108.9″ along a position angle of 57°, as of 2004.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 3.0 3.1 3.2 Massarotti, Alessandro et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, doi:10.1088/0004-6256/135/1/209, Bibcode: 2008AJ....135..209M.
- ↑ 4.0 4.1 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 5.2 Scarfe, C. D. (October 2017), "Spectroscopic Orbits of Three Binaries", Revista Mexicana de Astronomía y Astrofísica 53: 333–347, Bibcode: 2017RMxAA..53..333S.
- ↑ "HD 13530". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+13530.
- ↑ 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.
- ↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997), Millennium Star Atlas, 1, Sky Publishing Corporation and the European Space Agency, p. 81, ISBN 0-933346-82-4.
- ↑ 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.
- ↑ Mason, Brian D. et al. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2017yCat....102026M.
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