53 Camelopardalis
{{Short description|Star in the constellation Camelopardalis}}
{{Starbox begin}}
{{Starbox image
| image = 250px
| caption = A light curve for AX Camelopardalis, plotted from TESS data
}}
{{Starbox observe
| epoch = J2000.0
| constell = Camelopardalis
| dec = {{DEC|+60|19|27.8016}}
| appmag_v = {{nowrap|6.02 (6.3 + 7.5)}}
}}
{{Starbox character
| type = main sequence
| variable = α2 CVn
}}
{{Starbox astrometry
| parallax = 11.2327
| p_error = 0.1547
}}
{{Starbox orbit
| period_unitless = {{Val|6.6504|0.0089}}
| axis = {{val|0.055|0.018}}
| inclination = {{val|55.4|2.9}}
| node = {{val|118.3|20.1}}
| periastron = {{Val|2001.2281|0.025}}
| eccentricity = {{Val|0.706|0.024}}
| periarg = {{Val|8.3|1.8}}
}}
{{Starbox detail
| component1 = 53 Cam A
| mass = {{Val|2.074|0.012}}
| radius = {{Val|2.36|0.10}}
| gravity = {{Val|3.70|0.10}}
| luminosity = {{Val|24.9|1.15}}
| temperature = {{Val|8400|150|fmt=commas}}
| metal_fe =
| rotational_velocity = {{Val|12.5|0.5|fmt=commas}}
| rotation = {{Val|8.02681|0.00004|u=days}}
| age_myr = {{Val|615|56|51}}
}}
{{Starbox catalog
| names = {{odlist | V=AX Cam | F=53 Cam | BD=+60°1105 | FK5=302 | HD=65339 | HIP=39261 | HR=3109 | SAO=14402 | GC=10822 | CCDM=08017+6019 | WDS=J08017+6019 }}
}}
{{Starbox reference
| Simbad = 53+Cam
}}
{{Starbox end}}
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 {{Convert|280|Gm|AU|abbr=on|lk=on}}, 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 {{Val|57|5|u=°}}. 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
{{reflist|refs=
{{cite DR2|1088465727807087744}}
{{cite simbad | title=53 Cam | access-date=2019-04-22 }}
| last1=Jarzębowski | first1=T.
| title=Relation between Light-variation and Magnetic Variation in Magnetic Alpha Variables
| journal=Acta Astronomica | date=1960 | volume=10 | pages=31–52
| bibcode=1960AcA....10...31J | url=https://articles.adsabs.harvard.edu/pdf/1960AcA....10...31J
| access-date=29 December 2024}}
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters | postscript=.
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | arxiv=1108.4971
| doi=10.1134/S1063773712050015 | s2cid=119257644 }}
| title=MAST: Barbara A. Mikulski Archive for Space Telescopes
| url=https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html
| publisher=Space Telescope Science Institute |access-date=8 December 2021}}
| title=Multiplicity among chemically peculiar stars. II. Cool magnetic Ap stars
| last1=Carrier | first1=F. | last2=North | first2=P.
| last3=Udry | first3=S. | last4=Babel | first4=J.
| display-authors=1 | journal=Astronomy and Astrophysics
| volume=394 | pages=151–169 | date=October 2002
| doi=10.1051/0004-6361:20021122 | postscript=.
| bibcode=2002A&A...394..151C | arxiv=astro-ph/0208082 | s2cid=14223227 }}
| title=Magnetic Doppler imaging of 53 Camelopardalis in all four Stokes parameters
| last1=Kochukhov | first1=O. | last2=Bagnulo | first2=S.
| last3=Wade | first3=G. A. | last4=Sangalli | first4=L.
| last5=Piskunov | first5=N. | last6=Landstreet | first6=J. D.
| last7=Petit | first7=P. | last8=Sigut | first8=T. A. A.
| display-authors=1 | journal=Astronomy and Astrophysics
| volume=414 | pages=613–632 | date=February 2004
| issue=2 | doi=10.1051/0004-6361:20031595 | bibcode=2004A&A...414..613K | doi-access=free }}
| last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I.
| title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars
| journal=Astrophysical Journal Supplement Series
| volume=99 | pages=135 | year=1995
| bibcode=1995ApJS...99..135A | doi=10.1086/192182 | doi-access=free }}
| display-authors=1 | last1=Samus | first1=N. N.
| last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V.
| last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N.
| title=General Catalogue of Variable Stars
| version=5.1 | journal=Astronomy Reports
| year=2017 | volume=61 | issue=1 | pages=80–88
| doi=10.1134/S1063772917010085 | bibcode=2017ARep...61...80S | s2cid=125853869 | postscript=. }}
| last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S.
| last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A.
| title=Dynamical Masses of a Selected Sample of Orbital Binaries
| display-authors=1 | journal=Astronomy & Astrophysics
| volume=546 | id=A69 | pages=5 | date=2012
| doi=10.1051/0004-6361/201219774 | bibcode=2012A&A...546A..69M | doi-access=free }}
}}
{{Stars of Camelopardalis}}
{{DEFAULTSORT:53 Camelopardalis}}
Category:A-type main-sequence stars
Category:Alpha2 Canum Venaticorum variables
Category:Spectroscopic binaries