QS Virginis
QS Virginis (abbreviated QS Vir) is an eclipsing binary system approximately 163 light-years away from the Sun, forming a cataclysmic variable. The system comprises an eclipsing white dwarf and red dwarf that orbit each other every 3.37 hours.
Visual band light curves for QS Virginis, adapted from O’Donoghue et al. (2003). The lowest plot shows two pre-eclipse dips. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 49m 52.0032s |
| Declination | −13° 13′ 37.0019″ |
| Apparent magnitude (V) | +14.8 |
| Characteristics | |
| Spectral type | DAm / M3.5V |
| Astrometry | |
| Proper motion (μ) | RA: 41.618±0.108 mas/yr Dec.: 17.984±0.097 mas/yr |
| Parallax (π) | 19.9632 ± 0.0584 mas |
| Distance | 163.4 ± 0.5 ly (50.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 11.74 + 11.82 |
| Orbit | |
| Period (P) | 217.092 min |
| Semi-major axis (a) | 0.0056 AU |
| Eccentricity (e) | 0.0 |
| Inclination (i) | 60° |
| Details | |
| White dwarf | |
| Mass | 0.78 M☉ |
| Radius | 0.011 R☉ |
| Luminosity | 0.0044 L☉ |
| Surface gravity (log g) | 8.34 cgs |
| Temperature | 14,200 K |
| Rotational velocity (v sin i) | 400 km/s |
| Red dwarf | |
| Mass | 0.43 M☉ |
| Radius | 0.42 R☉ |
| Luminosity | 0.015 L☉ |
| Temperature | 3,100 K |
| Rotational velocity (v sin i) | 140 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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