Psi⁷ Aurigae

Psi⁷ Aurigae
	Template:Location mark; Location of ψ7 Aurigae (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Auriga
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	5.02
Characteristics
Spectral type	K3 III
U−B Template:Engvar	+1.35
B−V Template:Engvar	+1.27
R−I Template:Engvar	0.46Script error: No such module "Unsubst".
Astrometry
Radial velocity (Rv)	+59.53±0.25 km/s
Proper motion (μ)	RA: −25.542 mas/yr ; Dec.: −137.253 mas/yr
Parallax (π)	9.6073±0.1274 mas
Distance	Template:Rnd ± Template:Rnd ly ; (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)	−0.33
Details
Mass	1.72Script error: No such module "Su". Template:Solar mass
Radius	19.680 Template:Solar radius
Luminosity	162Script error: No such module "Su". Template:Solar luminosity
Surface gravity (log g)	2.35 cgs
Temperature	4,340±90 K
Metallicity [Fe/H]	0.00 dex
Rotational velocity (v sin i)	10 km/s
Age	700±200 Myr
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
	Template:Odlist
Database references
SIMBAD	data

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ψ⁷ Aurigae in optical light

Psi⁷ Aurigae, is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ψ⁷ Aurigae, and abbreviated Psi⁷ Aur or ψ⁷ Aur. This is a dim, naked eye star with an apparent visual magnitude of 5.02. Based upon parallax measurements, it is approximately Script error: No such module "convert". distant from Earth. It is receding from the Sun with a radial velocity of +60 km/s.^[5] Psi⁷ Aur is a probable member of the Hercules stream of co-moving stars.^[11]

ψ⁷ Aur is an evolved giant star with a stellar classification of K3 III.^[4] With 1.7^[6] times the mass of the Sun, at an age of about 700 million^[11] it has expanded to almost 20 times the Sun's radius.^[7] The outer envelope has an effective temperature of 4,340,^[6] 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 162 times as much electromagnetic radiation.^[6]

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).Script error: No such module "Unsubst".

References

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Observation data Epoch J2000 Equinox J2000
Template:Location mark Location of ψ⁷ Aurigae (circled)
Constellation	Auriga^[1]
Right ascension	Template:RA^[2]
Declination	Template:DEC^[2]
Apparent magnitude (V)	5.02^[3]
Characteristics
Spectral type	K3 III^[4]
U−B Template:Engvar	+1.35^[3]
B−V Template:Engvar	+1.27^[3]
R−I Template:Engvar	0.46Script error: No such module "Unsubst".
Astrometry

Radial velocity (R_v)	+59.53±0.25^[5] km/s
Proper motion (μ)	RA: −25.542 mas/yr^[2] Dec.: −137.253 mas/yr^[2]
Parallax (π)	9.6073±0.1274 mas^[2]
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Absolute magnitude (M_V)	−0.33^[1]

Details

Mass	1.72Script error: No such module "Su".^[6] Template:Solar mass
Radius	19.680^[7] Template:Solar radius
Luminosity	162Script error: No such module "Su".^[6] Template:Solar luminosity
Surface gravity (log g)	2.35^[8] cgs
Temperature	4,340±90^[6] K
Metallicity [Fe/H]	0.00^[8] dex
Rotational velocity (v sin i)	10^[9] km/s
Age	700±200^[6] Myr

Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist^[10]
Database references
SIMBAD	data