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]
Quick facts Observation data Epoch J2000 Equinox J2000, Constellation ...
S Virginis
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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 |
|---|
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|---|
| 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) |
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| Details |
|---|
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| 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 |
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| Other designations |
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| 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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