HD 33541
Location of HD 33541 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 05h 18m 13.24213s[1]
Declination +73° 16′ 05.1509″[1]
Apparent magnitude (V) 5.83±0.01[2]
Characteristics
Spectral type A0 V[3]
U−B color index −0.12[2]
B−V color index −0.04[2]
Astrometry
Radial velocity (Rv)9.9±3.2[4] km/s
Proper motion (μ) RA: −2.361 mas/yr[1]
Dec.: −28.254 mas/yr[1]
Parallax (π)9.0993 ± 0.0488 mas[1]
Distance358 ± 2 ly
(109.9 ± 0.6 pc)
Absolute magnitude (MV)+0.58[5]
Orbit[6]
PrimaryHD 33541A
CompanionHD 33541B
Period (P)20.8199180±0.0000458 d
Eccentricity (e)0.245±0.006
Periastron epoch (T)2,457,388.471+0.002
−0.003 JD
Argument of periastron (ω)
(secondary)		108±1°
Semi-amplitude (K1)
(primary)		39.3±0.3 km/s
Semi-amplitude (K2)
(secondary)		38.0±0.3 km/s
Details
Mass2.69±0.35[7] M☉
Radius2.52±0.13[8] R☉
Luminosity69.3±0.9[1] L☉
Surface gravity (log g)4.09+0.07
−0.05[7] cgs
Temperature11,200[9] K
Metallicity [Fe/H]−0.15[10] dex
Rotational velocity (v sin i)70[11] km/s
Age300[12] Myr
Other designations
AG+73°141, BD+73°280, GC 6405, HD 33541, HIP 24732, HR 1683, SAO 5483[13]
Database references
SIMBADdata

HD 33541, also known as HR 1683, is a white-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.83,[2] making it faintly visible to the naked eye. Gaia DR3 parallax measurements imply a distance of 358 light years[1] and it is currently receding with a heliocentric radial velocity of 9.9 km/s.[4] At its current distance HD 33541's brightness is diminished by 0.16 magnitudes due to interstellar extinction[14] and it has an absolute magnitude of +0.58.[5]

The object has a stellar classification of A0 V,[3] indicating that it is an ordinary A-type main-sequence star. It has 2.69 times the mass of the Sun[7] and 2.52 times the Sun's radius.[8] It radiates 69.3 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 11,200 K.[9] HD 33541 has an iron abundance 71% that of the Sun ([Fe/H] = −0.15)[10] and it is estimated to be 300 million years old.[12] The star spins modestly with a projected rotational velocity of 70 km/s.[11]

HD 33541 was originally considered to be a solitary star.[15] However, Abt & Morell (1995) suggested that HD 33541 may be a close binary with two components that each have rotational velocities of 10 km/s.[16] A later paper gives the rotational velocity of the primary as 60 km/s and of the secondary 11 km/s.[17] It is now considered to be a spectroscopic binary with a period of 20.8 hours and a somewhat eccentric orbit based on Gaia DR3 models.[6]

References

  1. 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89: 415. Bibcode:1991A&AS...89..415O. ISSN 0365-0138.
  3. 1 2 Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375. Bibcode:1969AJ.....74..375C. doi:10.1086/110819. ISSN 0004-6256. S2CID 121555804.
  4. 1 2 Gontcharov, G. A. (November 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
  5. 1 2 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  6. 1 2 Gaia Collaboration (2022). "VizieR Online Data Catalog: Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1357....0G.
  7. 1 2 3 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  8. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
  9. 1 2 Philip, A. G. D.; Egret, D. (May 1980). "An analysis of the Hauck-Mermillod catalogue of homogeneous four-color data. II". Astronomy and Astrophysics Supplement Series. 40: 199–205. Bibcode:1980A&AS...40..199P. ISSN 0365-0138.
  10. 1 2 Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361. S2CID 131780028.
  11. 1 2 Dworetsky, Michael M. (November 1974). "Rotational Velocities of A0 Stars". The Astrophysical Journal Supplement Series. American Astronomical Society. 28: 101. Bibcode:1974ApJS...28..101D. doi:10.1086/190312. ISSN 0067-0049. S2CID 123416887.
  12. 1 2 Gontcharov, G. A. (December 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 118345778.
  13. ↑ "HD 33541". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 18, 2023.
  14. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711. S2CID 118879856.
  15. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 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. eISSN 1365-2966. ISSN 0035-8711. S2CID 14878976.
  16. ↑ Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049. S2CID 120495962.
  17. ↑ Glebocki, R.; Gnacinski, P. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-Line Data Catalog: III/244. Originally Published in: 2005csss...13..571G. 3244. Bibcode:2005yCat.3244....0G.
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