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6 Persei

6 Persei
Observation data
Epoch J2000      Equinox J2000
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 mas[1]
Distance182.3 ± 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]
Mass1.5 M☉
Radius7 R☉
Luminosity26.3 L☉
Surface gravity (log g)3.0 cgs
Temperature4,920 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[6]
Database references
SIMBADdata

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]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Scarfe2017 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference msa was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference WDSC was invoked but never defined (see the help page).
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