S Virginis

S Virginis is a Mira-type variable star in the constellation Virgo. Located approximately 700 parsecs (2,300 ly) distant,^[3] it varies between magnitudes 6.3 and 13.2 over a period of approximately 375 days.^[4] John Russell Hind announced the discovery this star in 1852.^[13]

ConstellationVirgo^[2]

Right ascension13^h 33^m 00.1103^s[3]

Declination−07° 11′ 41.0387″^[3]

Apparentmagnitude(V)6.3 - 13.2^[4]

Quick facts Observation data Epoch J2000 Equinox J2000, Constellation ...

S Virginis

The visual band light curve of S Virginis, from AAVSO data[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Virgo[2]
Right ascension	13h 33m 00.1103s[3]
Declination	−07° 11′ 41.0387″[3]
Apparent magnitude (V)	6.3 - 13.2[4]
Characteristics
Evolutionary stage	AGB[5]
Spectral type	M6IIIe-M9.5e[4]
U−B color index	+2.1[6]
B−V color index	+0.74[6]
Variable type	Mira[4]
Astrometry
Radial velocity (Rv)	9.60[7] km/s
Proper motion (μ)	RA: −16.813±0.680[3] mas/yr Dec.: 3.010±0.537[3] mas/yr
Parallax (π)	1.3709±0.3737 mas[3]
Distance	approx. 2,400 ly (approx. 700 pc)
Details
Mass	3.6[8] M☉
Radius	435[9] R☉
Luminosity	38.174[10] L☉
Surface gravity (log g)	2.29[8] cgs
Temperature	3,283[11] K
Metallicity [Fe/H]	−0.24[8] dex
Other designations
S Virginis, BD−06°3837, HIP 66100, GC 18312, HR 5101, AAVSO 1327-06, GCRV 8027, SAO 139403, HD 117833[12]
Database references
SIMBAD	data

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