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Psi7 Aurigae information


For other stars with a similar Bayer designation, see ψ Aurigae.
Psi7 Aurigae
Location of ψ7 Aurigae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 50m 45.94330s[1]
Declination +41° 46′ 52.4267″[1]
Apparent magnitude (V) 5.02[2]
Characteristics
Spectral type K3 III[3]
U−B color index +1.35[2]
B−V color index +1.27[2]
R−I color index 0.46
Astrometry
Radial velocity (Rv)+59.53 ± 0.25[4] km/s
Proper motion (μ) RA: –25.660[5] mas/yr
Dec.: –138.163[5] mas/yr
Parallax (π)9.8872 ± 0.1499 mas[5]
Distance330 ± 5 ly
(101 ± 2 pc)
Absolute magnitude (MV)−0.33[6]
Details
Radius24[7] R☉
Luminosity217[6] L☉
Surface gravity (log g)2.35[8] cgs
Temperature4,300[8] K
Metallicity [Fe/H]0.00[8] dex
Rotational velocity (v sin i)10[9] km/s
Other designations
ψ7 Aur, 58 Aurigae, BD+41 1536, FK5 2527, HD 49520, HIP 32844, HR 2516, SAO 41380.[10]
Database references
SIMBADdata
ψ7 Aurigae in optical light

Psi7 Aurigae, Latinized from ψ7 Aurigae, is a star in the northern constellation of Auriga. It is a dim, naked eye star with an apparent visual magnitude of 5.02. Based upon Gaia Data Release 2 parallax values, it is approximately 330 light-years (100 parsecs) from Earth.

ψ7 Aurigae is a giant star with a stellar classification of K3 III.[3] The measured angular diameter of this star, after correction for limb darkening, is 1.96 ± 0.04 mas.[11] At its estimated distance,[1] this yields a physical size of about 24 times the radius of the Sun.[7] The outer envelope has an effective temperature of 4,300,[8] giving it an orange colour and a classification as a K-type star.[12] Although cooler than the sun, its larger size means that it is more luminous, emitting in total 217 times as much electromagnetic radiation.

It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).

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Psi7 Aurigae

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Psi7 Aurigae, Latinized from ψ7 Aurigae, is a star in the northern constellation of Auriga. It is a dim, naked eye star with an apparent visual magnitude...

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