QS Virginis

QS Virginis

Visual band light curves for QS Virginis, adapted from O’Donoghue et al. (2003).[1] The lowest plot shows two pre-eclipse dips.
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 13h 49m 52.0032s[2]
Declination −13° 13′ 37.0019″[2]
Apparent magnitude (V) +14.8
Characteristics
Spectral type DAm / M3.5V
Astrometry
Proper motion (μ) RA: 41.618±0.108[2] mas/yr
Dec.: 17.984±0.097[2] mas/yr
Parallax (π)19.9632 ± 0.0584 mas[2]
Distance163.4 ± 0.5 ly
(50.1 ± 0.1 pc)
Absolute magnitude (MV)11.74 + 11.82[1]
Orbit
Period (P)217.092 min[1]
Semi-major axis (a)0.0056 AU
Eccentricity (e)0.0
Inclination (i)60[1]°
Details[1]
White dwarf
Mass0.78 M
Radius0.011 R
Luminosity0.0044[3] L
Surface gravity (log g)8.34 cgs
Temperature14,200 K
Rotational velocity (v sin i)400 km/s
Red dwarf
Mass0.43 M
Radius0.42 R
Luminosity0.015[3] L
Temperature3,100 K
Rotational velocity (v sin i)140 km/s
Other designations
GSC 05559-00143, 1RXS J134951.0-131338, WD 1347-129, EC 13471-1258, SBC9 1944[4]
Database references
SIMBADdata
Exoplanet Archivedata

QS Virginis (abbreviated QS Vir) is an eclipsing binary system approximately 163 light-years away from the Sun,[1][2] forming a cataclysmic variable. The system comprises an eclipsing white dwarf and red dwarf that orbit each other every 3.37 hours.[1]

  1. ^ a b c d e f g O'Donoghue; Koen, C.; Kilkenny, D.; Stobie, R. S.; et al. (2003). "The DA+dMe eclipsing binary EC13471-1258: its cup runneth over ... just". Monthly Notices of the Royal Astronomical Society. 345 (2): 506–528. arXiv:astro-ph/0307144. Bibcode:2003MNRAS.345..506O. doi:10.1046/j.1365-8711.2003.06973.x. S2CID 17408072.
  2. ^ a b c d e f Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  3. ^ a b Calculated from the effective temperature and radius
  4. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).