58 Persei


58 Persei
Perseus constellation map.svg
Red circle.svg
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]
Spectral type K1II + B7V[3]
U−B color index +0.81[2]
B−V color index +1.24[2]
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[1] mas
Distance800 ± 70 ly
(240 ± 20 pc)
Absolute magnitude (MV)-2.67[5]
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)
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] Gyr
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

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 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ a b c d 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.
  4. ^ a b Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  5. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644. Vizier catalog entry
  6. ^ Heintz, W.D. (1997). "Photographic astrometry of binary and proper-motion stars. VII". Astronomical Journal. 105 (3): 1188–1195. Bibcode:1997yCat.1239....0E. doi:10.1086/116503.
  7. ^ a b c d e f Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873. Vizier catalog entry
  8. ^ a b van Belle, G. T.; et al. (2009). "Supergiant temperatures and linear radii from near-infrared interferometry". Monthly Notices of the Royal Astronomical Society. 394 (4): 1925. arXiv:0811.4239. Bibcode:2009MNRAS.394.1925V. doi:10.1111/j.1365-2966.2008.14146.x. S2CID 118372600.
  9. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
  10. ^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv:astro-ph/0608248. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401. Vizier catalog entry
  11. ^ "58 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-23.
  12. ^ a b Parsons, Sidney B. (May 2004). "New and Confirmed Triple Systems with Luminous Cool Primaries and Hot Companions". The Astronomical Journal. 127 (5): 2915–2930. Bibcode:2004AJ....127.2915P. doi:10.1086/383546.
  13. ^ Batten, Alan H.; Fletcher, J. M.; MacCarthy, D. G. (1989). "Catalogue of the orbital elements of spectroscopic binary systems : 8 : 1989". Publications of the Dominion Astrophysical Observatory. 17: 1. Bibcode:1989PDAO...17....1B.