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58 Persei

This article is about e Persei. Not to be confused with ε (epsilon) Persei.
58 Persei
Location of 58 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 04h 36m 41.43017s[1]
Declination +41° 15′ 53.3213″[1]
Apparent magnitude (V) 4.26[2]
Characteristics
Spectral type K1II + B7V[3]
U−B color index +0.81[2]
B−V color index +1.24[2]
Astrometry
Radial velocity (Rv)+9.80[4] km/s
Proper motion (μ) RA: −4.56[1] mas/yr
Dec.: −17.84[1] mas/yr
Parallax (π)4.09 ± 0.38 mas[1]
Distance800 ± 70 ly
(240 ± 20 pc)
Absolute magnitude (MV)-2.67[5]
Orbit[6]
Primary58 Persei A
Companion58 Persei B
Period (P)28.8 yr
Semi-major axis (a)0.051″
Eccentricity (e)0.64
Inclination (i)81°
Longitude of the node (Ω)237°
Periastron epoch (T)1978.65
Argument of periastron (ω)
(secondary)		191°
Details
58 Per A
Mass6.8±0.2[7] M☉
Radius56±11[8] R☉
Luminosity1,698[5] L☉
Surface gravity (log g)2.21[9] cgs
Temperature5,173±32[7] K
Metallicity [Fe/H]−0.20[5] dex
Rotational velocity (v sin i)11.0[10] km/s
Age50.1±6.8[7] Myr
Other designations
Boss 1074, 58 Per, BD+40°1000, FK5 2338, GC 5609, HD 29094–95, HIP 21476, HR 1454, SAO 39639, CCDM J04367+4116A[11]
Database references
SIMBADdata

58 Persei is a binary[3] and possibly a triple[12] star system in the northern constellation of Perseus. It has the Bayer designation e Persei, while 58 Persei is the Flamsteed designation. This system is visible to the naked eye as a faint point of light with an apparent visual magnitude of 4.26.[2] It is approximately 800 light years away from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +10 km/s.[4]

This is a single-lined spectroscopic binary system with an orbital period of 28.7 years and an eccentricity of 0.65.[13] The primary member, designated component A, is an orange-hued (K–type) bright giant with a stellar classification of K1II.[3] The star is around 50[7] million years old with 7[7] times the mass of the Sun. Having exhausted the supply of hydrogen at its core, it has expanded to roughly 56[8] times the Sun's radius. It is radiating 1,698[5] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,173 K.[7]

The secondary, component B, appears to be a B-type main-sequence star with a stellar classification of B7V.[3] It is a suspected binary of unknown period with component masses of 3.3 and 1.2 times the mass of the Sun.[12]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference XHIP was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Heintz1997 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference vanBelle2009 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Soubiran2016 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference deMedeiros1999 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Parsons2004 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Batten was invoked but never defined (see the help page).
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