Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Camelopardalis |
Right ascension | 08h 01m 42.43137s[2] |
Declination | +60° 19′ 27.8016″[2] |
Apparent magnitude (V) | 6.02[3] (6.3 + 7.5)[4] |
Characteristics | |
Evolutionary stage | main sequence |
Spectral type | A3VpSrSiCrEu[5] |
B−V color index | 0.158±0.005[3] |
Variable type | α2 CVn[6] |
Astrometry | |
Radial velocity (Rv) | −2.2[3] km/s |
Proper motion (μ) | RA: −21.367[2] mas/yr Dec.: −26.386[2] mas/yr |
Parallax (π) | 11.2327 ± 0.1547 mas[2] |
Distance | 290 ± 4 ly (89 ± 1 pc) |
Absolute magnitude (MV) | 1.05[3] |
Orbit[7] | |
Period (P) | 2,422.04±2.42 d |
Eccentricity (e) | 0.718±0.012 |
Periastron epoch (T) | 2,427,723.6±14.3 JD |
Argument of periastron (ω) (secondary) | 5.22±1.64° |
Semi-amplitude (K1) (primary) | 12.08±0.45 km/s |
Details[7] | |
53 Cam A | |
Mass | 2.074±0.012 M☉ |
Radius | 2.36±0.10 R☉ |
Luminosity | 24.9±1.15 L☉ |
Surface gravity (log g) | 3.70±0.10 cgs |
Temperature | 8,400±150 K |
Rotation | 8.02681±0.00004 d |
Rotational velocity (v sin i) | 12.5±0.5 km/s |
Age | 615+56 −51 Myr |
Other designations | |
Database references | |
SIMBAD | data |
53 Camelopardalis is a binary star system in the northern circumpolar constellation of Camelopardalis,[8] located 290 light years away from the Sun as determined by parallax measurements.[2] It has the variable star designation AX Camelopardalis; 53 Camelopardalis is the Flamsteed designation.[8] This object is dimly visible to the naked eye as a white hued star with a baseline apparent visual magnitude of +6.02.[3] It is a single-lined spectroscopic binary[9] system with an orbital period of 6.63 years and a high eccentricity of 0.718.[7] The "a sin i" value of the primary is 280 Gm (1.9 AU), where a is the semimajor axis and i is the orbital inclination.[7]
The visible component is a well-studied magnetic Ap star[7] with a stellar classification of A3VpSrSiCrEu[5] and a visual magnitude of 6.3.[4] The magnetic field topology of 53 Camelopardalis is complex, and is accompanied by abundance variations across the surface of elements like silicon, calcium, titanium, iron, and neodymium.[7] It is classified as an Alpha2 Canum Venaticorum type variable star and the combined brightness of the system varies from magnitude +6.00 down to +6.05 with a rotationally-modulated period of 8.0278 days.[6]
The primary has 2.1 times the mass of the Sun and 2.4 times the Sun's radius. It is spinning with a projected rotational velocity of 12.5 km/s and a rotation period of 8.0268 days. The inclination angle of the pole is estimated to be 57°±5°. The star is about 615 million years old and is radiating 25 times the luminosity of the Sun from its photosphere at an effective temperature of 8,400 K.[7]
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