HD 91942

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HD 91942
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.45[2]
Characteristics
Evolutionary stage Bright giant[3]
Spectral type K3II-IIb[4]
B−V Template:Engvar Script error: No such module "val".[2]
Variable type Suspected[5]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: −15.93[1] mas/yr
Dec.: +0.49[1] mas/yr
Parallax (π)2.77±0.17 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−3.77[2]
Details
MassScript error: No such module "val".[6] Template:Solar mass
RadiusScript error: No such module "val".[7] Template:Solar radius
LuminosityScript error: No such module "val".[7] Template:Solar luminosity
Surface gravity (log g)2.0[3] cgs
TemperatureScript error: No such module "val".[7] K
Metallicity [Fe/H]0.0[3] dex
Rotational velocity (v sin i)5.8[3] km/s
AgeScript error: No such module "val".[6] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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HD 91942 is a single[9] variable star in the constellation Carina. It has the Bayer designation r Carinae, while HD 91942 is the identifier from the Henry Draper catalogue. This orange-hued object is visible to the naked eye with an apparent visual magnitude of 4.45.[2] Based on parallax measurements, it is located at a distance of approximately 1,180 light years from the Sun.[1] The star has an absolute magnitude of −3.77,[2] and is drifting further away with a radial velocity of +9.9 km/s.[2]

This object is a massive, aging bright giant with a stellar classification of K3II-IIb.[4] It is a suspected variable star that fluctuates in magnitude by an amplitude of 0.05 in the B-band of the UBV photometric system.[5] With the supply of hydrogen exhausted at its core, it has evolved of the main sequence and cooled and expanded to 156[7] times the Sun's radius. It is an estimated 36[6] million years old with eight[6] times the mass of the Sun. It is radiating around 5,500[7] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,983 K.[7]

References

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  7. ↑ a b c d e f Template:Cite Gaia DR2
  8. ↑ Template:Cite simbad
  9. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Carina Template:Sky

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