53 Camelopardalis

53 Camelopardalis

A light curve for AX Camelopardalis, plotted from TESS data
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Camelopardalis
Right ascension 08h 01m 42.44039s
Declination +60° 19′ 27.8068″
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: −25.627 mas/yr
Dec.: −26.731 mas/yr
Parallax (π)11.2405±0.2219 mas
Distance290 ± 6 ly
(89 ± 2 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
Mass2.074±0.012 M☉
Radius2.36±0.10 R☉
Luminosity24.9±1.15 L☉
Surface gravity (log g)3.70±0.10 cgs
Temperature8,400±150 K
Rotation8.02681±0.00004 d
Rotational velocity (v sin i)12.5±0.5 km/s
Age615+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
SIMBADdata

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.

References

  1. ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
  2. 1 2 3 4 5 6 7 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.
  3. 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  4. 1 2 Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69
  5. 1 2 Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement Series, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
  6. 1 2 Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
  7. ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 2025-02-08.
  8. 1 2 3 4 5 6 7 Carrier, F.; North, P.; Udry, S.; Babel, J. (October 2002), "Multiplicity among chemically peculiar stars. II. Cool magnetic Ap stars", Astronomy and Astrophysics, 394: 151–169, arXiv:astro-ph/0208082, Bibcode:2002A&A...394..151C, doi:10.1051/0004-6361:20021122, S2CID 14223227.
  9. 1 2 3 "53 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-04-22.
  10. ↑ Kochukhov, O.; Bagnulo, S.; Wade, G. A.; Sangalli, L.; Piskunov, N.; Landstreet, J. D.; Petit, P.; Sigut, T. A. A. (February 2004), "Magnetic Doppler imaging of 53 Camelopardalis in all four Stokes parameters", Astronomy and Astrophysics, 414 (2): 613–632, Bibcode:2004A&A...414..613K, doi:10.1051/0004-6361:20031595
  11. ↑ Jarzębowski, T. (1960). "Relation between Light-variation and Magnetic Variation in Magnetic Alpha Variables". Acta Astronomica. 10: 31–52. Bibcode:1960AcA....10...31J.