32 Persei


32 Persei is a single[12] star located 149[1] light years away from the Sun in the northern constellation of Perseus.[11] It has the Bayer designation of l Persei, while 32 Persei is the Flamsteed designation. This object is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.96.[2] It is moving closer to the Earth with a heliocentric radial velocity of −9 km/s,[5] and is a member of the Sirius supercluster: a stream of stars that share a common motion through space.[13]

32 Persei
Perseus constellation map.svg
Red circle.svg
Location of 32 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 21m 26.55723s[1]
Declination 43° 19′ 46.7414″[1]
Apparent magnitude (V) 4.96[2]
Spectral type A3V[3]
U−B color index +0.07[4]
B−V color index +0.04[4]
Radial velocity (Rv)−9.00[5] km/s
Proper motion (μ) RA: −59.947[1] mas/yr
Dec.: −0.839[1] mas/yr
Parallax (π)21.8865 ± 0.2690 mas[1]
Distance149 ± 2 ly
(45.7 ± 0.6 pc)
Absolute magnitude (MV)1.64[2]
Mass2.05[6] M
Radius1.8[7] R
Luminosity21[6] L
Surface gravity (log g)4.19[8] cgs
Temperature8,872[6] K
Metallicity [Fe/H]−0.01[9] dex
Rotational velocity (v sin i)144[6] km/s
[10] Myr
Other designations
l Per, 32 Per, NSV 1107, BD+42°750, FK5 2236, GC 4004, HD 20677, HIP 15648, HR 1002, SAO 38750[11]
Database references

This is an ordinary A-type main-sequence star with a stellar classification of A3V.[3] It is around 125[10] million years old with a high rate of spin, showing a projected rotational velocity of 144 km/s.[6] The star has double[6] the mass of the Sun and 1.8[7] times the Sun's radius. It is radiating 21[6] times the luminosity of the Sun from its photosphere at an effective temperature of 8,872 K.[6]


  1. ^ a b c d e f 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.
  2. ^ a b c 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
  3. ^ a b Cowley, A.; et al. (April 1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal. 74: 375–406. Bibcode:1969AJ.....74..375C. doi:10.1086/110819.
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42 (2): 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^ 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.
  6. ^ a b c d e f g h Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789. Vizier catalog entry
  7. ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  8. ^ David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. S2CID 33401607. Vizier catalog entry
  9. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. S2CID 118345778. Vizier catalog entry
  10. ^ a b Meshkat, Tiffany; et al. (December 2017). "A Direct Imaging Survey of Spitzer-detected Debris Disks: Occurrence of Giant Planets in Dusty Systems". The Astronomical Journal. 154 (6): 21. arXiv:1710.04185. Bibcode:2017AJ....154..245M. doi:10.3847/1538-3881/aa8e9a. S2CID 42042014. 245.
  11. ^ a b "32 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-07-10.
  12. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
  13. ^ Palous, J.; Hauck, B. (July 1986), "The Sirius supercluster", Astronomy and Astrophysics, 162: 54–61, Bibcode:1986A&A...162...54P.