HD 33541

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]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference GaiaDR3orbit was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Phillip1980 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Dworestky1974 was invoked but never defined (see the help page).
  12. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  16. ^ Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Glebocki2005 was invoked but never defined (see the help page).