Beta Camelopardalis

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β Camelopardalis
Template:Location mark
Location of β Cam (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.02[2]
Characteristics
Spectral type G1Ib–IIa[3]
U−B Template:Engvar +0.62[2]
B−V Template:Engvar +0.93[2]
R−I Template:Engvar +0.49[2]
Astrometry
Radial velocity (Rv)−1.90[4] km/s
Proper motion (μ) RA: −5.561 mas/yr[1]
Dec.: −14.400 mas/yr[1]
Parallax (π)3.8800±0.1635 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−3.1[5]
Details
Mass6.5[3] Template:Solar mass
RadiusTemplate:Val[6] Template:Solar radius
Luminosity1,592[7] Template:Solar luminosity
Surface gravity (log g)1.79[3] cgs
Temperature5,300[3] K
Metallicity [Fe/H]−0.06[8] dex
Rotational velocity (v sin i)11.7[9] km/s
Age53[3] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

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Beta Camelopardalis is the brightest star in the northern constellation of Camelopardalis. Its name is a Bayer designation that is Latinised from β Camelopardalis, and abbreviated Beta Cam or β Cam. This star is bright enough to be faintly visible to the naked eye, having an apparent visual magnitude of 4.02.[2] Based upon an annual parallax shift of Template:Val as seen from Earth, it is located at a distance of approximately Template:Convert from the Sun. It is moving closer with a radial velocity of −1.90 km/s[4] and is most likely a single[10] star.

This is a yellow-hued G-type supergiant/bright giant with a stellar classification of G1 Ib–IIa.[3] It is an estimated 60 million years old and is spinning with a projected rotational velocity of 11.7 km/s.[9] This is an unusually high rate of rotation for an evolved star of this type. One possible explanation is that it may have engulfed a nearby giant planet, such as a hot Jupiter.[11]

Beta Camelopardalis has 6.5 times the mass of the Sun[3] and has expanded to around 58 the Sun's radius.[6] The star is radiating 1,592 times the Sun's luminosity from its enlarged photosphere[7] at an effective temperature of Template:Val.[3] It is a source of X-ray emission.[12]

β Cam has two visual[10] companions: a 7th-magnitude A5-class star at an angular separation of 84 arcseconds; and a 12th-magnitude star at 15 arcseconds.[13]

References

Template:Reflist

External links

Template:Stars of Camelopardalis

  1. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  2. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named ducati
  3. ↑ a b c d e f g h Cite error: Invalid <ref> tag; no text was provided for refs named leonid
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Gontcharov2006
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named gray
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named vanBelle2009
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named McDonald2012
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Kovtyukh_et_al_2012
  9. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named dasilva
  10. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named mnras389_2_869
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Silva
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named apjss184_1_138
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named wds
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