Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Camelopardalis [1] |
Right ascension | 05h 18m 13.24213s [2] |
Declination | +73° 16′ 05.1509″ [2] |
Apparent magnitude (V) | 5.83±0.01 [3] |
Characteristics | |
Evolutionary stage | main sequence [2] |
Spectral type | A0 V [4] |
U−B color index | −0.12 [3] |
B−V color index | −0.04 [3] |
Astrometry | |
Radial velocity (Rv) | 9.9±3.2 [5] km/s |
Proper motion (μ) | RA: −2.361 mas/yr [2] Dec.: −28.254 mas/yr [2] |
Parallax (π) | 9.0993±0.0488 mas [2] |
Distance | 358 ± 2 ly (109.9 ± 0.6 pc) |
Absolute magnitude (MV) | +0.58 [1] |
Orbit [6] | |
Primary | HD 33541A |
Companion | HD 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 | |
Mass | 2.69±0.35 [7] M☉ |
Radius | 2.52±0.13 [8] R☉ |
Luminosity | 69.3±0.9 [2] L☉ |
Surface gravity (log g) | 4.09+0.07 −0.05 [7] cgs |
Temperature | 11,200 [9] K |
Metallicity [Fe/H] | −0.15 [10] dex |
Rotational velocity (v sin i) | 70 [11] km/s |
Age | 300 [12] Myr |
Other designations | |
AG+73°141, BD+73°280, GC 6405, HD 33541, HIP 24732, HR 1683, SAO 5483 [13] | |
Database references | |
SIMBAD | data |
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, [3] making it faintly visible to the naked eye. Gaia DR3 parallax measurements imply a distance of 358 light years [2] and it is currently receding with a heliocentric radial velocity of 9.9 km/s . [5] 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. [1]
The object has a stellar classification of A0 V, [4] 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 [2] 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]