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☉
Radius70.71±6.67[8] R☉
Luminosity1,731±323[8] L☉
Surface gravity (log g)2.21[9] cgs
Temperature4,500[8] 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 71 times the Sun's radius. It is radiating 1,731 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,500 K.[8]

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 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 Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference van Belle 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).