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
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]
Characteristics
Spectral type F5V[3]
U−B color index +0.00[4]
B−V color index +0.41[4]
Astrometry
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[6] mas
Distance125.4 ± 0.6 ly
(38.5 ± 0.2 pc)
Absolute magnitude (MV)2.23[2]
Orbit[7]
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)
(secondary)		27.07°
Semi-amplitude (K1)
(primary)		51.85 km/s
Semi-amplitude (K2)
(secondary)		54.40 km/s
Details
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
SIMBADdata

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]

References
  1. Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 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. Vizier catalog entry
  3. Abt, Helmut A. (2009). "Mk Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement Series. 180: 117. Bibcode:2009ApJS..180..117A. doi:10.1088/0067-0049/180/1/117.
  4. 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  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. 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. 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. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  9. 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. Vizier catalog entry
  10. 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. 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
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