Upsilon Piscis Austrini (υ Piscis Austrini) is a solitary,[9] orange-hued star in the southern constellation of Piscis Austrinus. It is faintly visible to the naked eye with an apparent visual magnitude of +4.98.[2] Based upon an annual parallax shift of 7.69 mas as seen from the Earth,[1] the star is located 420 light-years from the Sun.

Upsilon Piscis Austrini

Location of υ Piscis Austrini (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Piscis Austrinus
Right ascension	22h 08m 25.93132s[1]
Declination	−34° 02′ 37.8248″[1]
Apparent magnitude (V)	+4.98[2]
Characteristics
Spectral type	K4 III[3]
B−V color index	+1.50[2]
Astrometry
Radial velocity (Rv)	+20.1[4] km/s
Proper motion (μ)	RA: +4.55[1] mas/yr Dec.: −49.02[1] mas/yr
Parallax (π)	7.69 ± 0.22 mas[1]
Distance	420 ± 10 ly (130 ± 4 pc)
Absolute magnitude (MV)	−0.47±0.062[5]
Details
Temperature	4,066[6] K
Rotational velocity (v sin i)	1.0±1.0[7] km/s
Other designations
υ PsA, CPD−34° 9054, HD 210066, HIP 109289, HR 8433, SAO 213577[8]
Database references
SIMBAD	data

This is an evolved K-type giant star with a stellar classification of K4 III.[3] It is catalogued as a member of the Wolf 630 moving group.[10] Upsilon Piscis Austrini is moving through the galaxy at a speed of 36.4 km/s relative to the Sun. Its projected galactic orbit carries it between 17,700 and 25,400 light-years from the center of the galaxy.[11]^{[unreliable source?]}

References

На других языках

[ru] Ипсилон Южной Рыбы