6 Persei

6 Persei
	Location of 6 Persei (circled)
Observation data; Epoch J2000 Equinox ICRS
Constellation	Andromeda
Right ascension	02h 13m 36.34084s
Declination	+51° 03′ 56.8222″
Apparent magnitude (V)	5.29
Characteristics
Spectral type	G8.5 IIIb Fe-2
B−V color index	0.926
Astrometry
Radial velocity (Rv)	+41.82±0.27 km/s
Proper motion (μ)	RA: +344.397 mas/yr ; Dec.: −164.853 mas/yr
Parallax (π)	17.8901±0.0943 mas
Distance	182.3 ± 1.0 ly ; (55.9 ± 0.3 pc)
Absolute magnitude (MV)	+1.25±0.07
Orbit
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
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
	NSV 747, AG+50°249, BD+50°481, FK5 77, HD 13530, HIP 10366, HR 645, SAO 23047, PPM 27263, WDS J02136+5104A
Database references
SIMBAD	data

6 Persei is a binary star system in the northern constellation of Andromeda. It is faintly visible to the naked eye with an apparent visual magnitude of 5.29. The system is located 182 light years from Earth, as determined from its annual parallax shift of 17.9 mas. It is moving further away with a heliocentric radial velocity of +42 km/s. The system has a relatively high rate of proper motion, traversing the celestial sphere at the rate of 0.386 arcsecond/year.

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°.

The visible component is an evolved giant star with a stellar classification of G8.5 IIIb Fe-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. It has a magnitude 10.49 visual companion at an angular separation of 108.9″ along a position angle of 57°, as of 2004.

References

↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
1 2 3 4 5 6 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. Gaia DR2 record for this source at VizieR.
1 2 3 4 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
1 2 3 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, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
1 2 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.
1 2 3 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. Retrieved 20 August 2018.
↑ 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.
↑ Sinnott, Roger W.; Perryman, Michael A. C. (1997), Millennium Star Atlas, vol. 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, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.
↑ 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, Bibcode:2017yCat....102026M, doi:10.1086/323920.

[constellation-1] Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.

[GaiaDR2-2] 1 2 3 4 5 6 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. Gaia DR2 record for this source at VizieR.

[perkins1989-3] 1 2 3 4 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.

[Massarotti2008-4] 1 2 3 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, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.

[deBruijne2012-5] 1 2 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.

[Scarfe2017-6] 1 2 3 Scarfe, C. D. (October 2017), "Spectroscopic Orbits of Three Binaries", Revista Mexicana de Astronomía y Astrofísica, 53: 333–347, Bibcode:2017RMxAA..53..333S.

[SIMBAD-7] "HD 13530". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 August 2018.

[Eggleton2008-8] 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.

[msa-9] Sinnott, Roger W.; Perryman, Michael A. C. (1997), Millennium Star Atlas, vol. 1, Sky Publishing Corporation and the European Space Agency, p. 81, ISBN 0-933346-82-4.

[Lepine2005-10] 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, arXiv:astro-ph/0412070, Bibcode:2005AJ....129.1483L, doi:10.1086/427854, S2CID 2603568.

[WDSC-11] 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, Bibcode:2017yCat....102026M, doi:10.1086/323920.