43 Persei


43 Persei is a binary star[7][11] system in the northern constellation Perseus. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.28.[2] The system is located around 38.5 parsecs (125.4 ly) distant from the Sun, based on parallax.[1]

43 Persei
Perseus constellation map.svg
Red circle.svg
Location of 43 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 56m 36.52069s[1]
Declination 50° 41′ 43.3646″[1]
Apparent magnitude (V) 5.28[2]
Spectral type F5V[3]
U−B color index +0.00[4]
B−V color index +0.41[4]
Radial velocity (Rv)+39.10[5] km/s
Proper motion (μ) RA: +92.450[1] mas/yr
Dec.: -129.755[1] mas/yr
Parallax (π)26.0059 ± 0.1271 mas[6]
Distance125.4 ± 0.6 ly
(38.5 ± 0.2 pc)
Absolute magnitude (MV)2.23[2]
Period (P)30.438 days
Semi-major axis (a)≥ 16 Gm (0.11 AU)
Eccentricity (e)0.631
Periastron epoch (T)2,440,873.14 JD
Argument of periastron (ω)
Semi-amplitude (K1)
51.85 km/s
Semi-amplitude (K2)
54.40 km/s
Mass1.54[8] M
Radius2.4[8] R
Luminosity10.81[2] L
Surface gravity (log g)4.12[9] cgs
Temperature6,609[9] K
Metallicity [Fe/H]0.00[2] dex
Rotational velocity (v sin i)17[10] km/s
Other designations
A Persei, 43 Per, BD+50°860, GC 4728, HD 24546, HIP 18453, HR 1210, SAO 24314, CCDM J03566+5042AP, WDS J03566+5042AD
Database references

This is a double-lined spectroscopic binary with an orbital period of 30.4 days and an eccentricity of 0.6.[7] The primary component is an F-type main-sequence star with a stellar classification of F5V,[3] a star that is fusing its core hydrogen. It has 1.54[8] times the mass of the Sun, 2.4[8] times the Sun's radius, and is spinning with a projected rotational velocity of 17 km/s (11 mi/s).[10] The star shines 10.8[2] times brighter than the Sun at an effective temperature of 6,609 K (6,336 °C; 11,437 °F).[9]

There are distant companions B (separation 75.5" and magnitude 10.66), C (separation 85.6" and magnitude 12.18), and D (separation 68" and magnitude 13.43).[12]


  1. ^ a b c d e 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 e f 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 Abt, Helmut A. (2009). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series. 180: 117–118. Bibcode:2009ApJS..180..117A. doi:10.1088/0067-0049/180/1/117.
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ^ 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. ^ 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.
  7. ^ a b c Wallerstein, George (February 1973). "Improved Elements for the Hyades Group Binary 43 Persei". Publications of the Astronomical Society of the Pacific. 85 (503): 115. Bibcode:1973PASP...85..115W. doi:10.1086/129417.
  8. ^ a b c d 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
  9. ^ a b c 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
  10. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  11. ^ 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. Vizier catalog entry
  12. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry