49 Cancri

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Template:About-distinguish Template:Short description

49 Cancri
Template:Location mark
Location of 49 Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.58 - 5.71[2]
Characteristics
Evolutionary stage Main sequence
Spectral type A1VpHgMnSiEu[3]
B−V Template:Engvar −0.069[4]
Variable type α2 CVn[2]
Astrometry
Radial velocity (Rv)+27.50[5] km/s
Proper motion (μ) RA: −14.686[1] mas/yr
Dec.: −18.466[1] mas/yr
Parallax (π)6.5062±0.0748 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.07[4]
Details
Mass3.011[6] Template:Solar mass
Radius2.909[6] Template:Solar radius
Luminosity102[7] Template:Solar luminosity
Surface gravity (log g)3.964[6] cgs
Temperature10,615[6] K
Metallicity [Fe/H]+0.013[6] dex
RotationScript error: No such module "val".[7]
Rotational velocity (v sin i)21[7] km/s
Age263[8] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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49 Cancri is a single star[10] in the zodiac constellation of Cancer, located 501 light years away from the Sun. It has the Bayer designation b Cancri; 49 Cancri is the Flamsteed designation. It is visible to the naked eye as a faint star with an apparent visual magnitude of about 5.6. It is moving away from the Earth with a heliocentric radial velocity of +27.5 km/s.

File:BICncLightCurve.png
A light curve for BI Cancri, plotted from TESS data[11]

In 1962, Helmut Abt and John C. Golson published a paper that showed that 49 Cancri was probably a variable star.[12] It was given its variable star designation, BI Cancri, in 1962.[13] Its brightness changes from magnitude 5.58 to 5.71 every seven days. It is classified as an α2 Canum Venaticorum variable, a class of magnetic chemically peculiar stars. The brightness changes are thought to correspond to the rotation of the star. 49 Cancri is classified from its spectrum as an Ap star, with enhanced lines of silicon, europium, and chromium.[14] Additionally, calcium and magnesium lines are described as weaker than normal.[3]

49 Cancri is classified as an A1 main sequence star.[3] It has three times the mass of the Sun, an effective temperature of Script error: No such module "val"., and a radius of Template:Solar radius.[6] It radiates about a hundred times the luminosity of the Sun due to its high temperature and large size.[7]

References

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  1. ↑ a b c d e Template:Cite Gaia DR3
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  3. ↑ a b c Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
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  6. ↑ a b c d e f Script error: No such module "Citation/CS1".
  7. ↑ a b c d Script error: No such module "Citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Template:Cite simbad
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "Citation/CS1".

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Template:Stars of Cancer

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