53 Camelopardalis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 08h 01m 42.43137s |
| Declination | +60° 19′ 27.8016″ |
| Apparent magnitude (V) | 6.02 (6.3 + 7.5) |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A3VpSrSiCrEu |
| B−V color index | 0.158±0.005 |
| Variable type | α2 CVn |
| Astrometry | |
| Radial velocity (Rv) | −2.2 km/s |
| Proper motion (μ) | RA: −21.367 mas/yr Dec.: −26.386 mas/yr |
| Parallax (π) | 11.2327±0.1547 mas |
| Distance | 290 ± 4 ly (89 ± 1 pc) |
| Absolute magnitude (MV) | 1.05 |
| Orbit | |
| Period (P) | 6.6504±0.0089 |
| Semi-major axis (a) | 0.055±0.018″ |
| Eccentricity (e) | 0.706±0.024 |
| Inclination (i) | 55.4±2.9° |
| Longitude of the node (Ω) | 118.3±20.1° |
| Periastron epoch (T) | 2001.2281±0.025 |
| Argument of periastron (ω) (secondary) | 8.3±1.8° |
| Semi-amplitude (K1) (primary) | 12.08±0.45 km/s |
| Details | |
| 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 | |
| 53 Cam, AX Cam, BD+60°1105, FK5 302, GC 10822, HD 65339, HIP 39261, HR 3109, SAO 14402, CCDM 08017+6019, WDS J08017+6019 | |
| Database references | |
| SIMBAD | data |
53 Camelopardalis is a binary star system in the northern circumpolar constellation of Camelopardalis, located 290 light years away from the Sun as determined by parallax measurements. It has the variable star designation AX Camelopardalis; 53 Camelopardalis is the Flamsteed designation. This object is dimly visible to the naked eye as a white hued star with a baseline apparent visual magnitude of +6.02. It is a single-lined spectroscopic binary system with an orbital period of 6.63 years and a high eccentricity of about 0.7. 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.
The visible component is a well-studied magnetic Ap star with a stellar classification of A3VpSrSiCrEu and a visual magnitude of 6.3. 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.
Tadeusz Jarzębowski discovered that 53 Camelopardalis is a variable star, in 1960. 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.
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.