OY Carinae
A blue band light curve for OY Carinae, adapted from Khruzina1 et al. (2003). The main plot shows the full light curve, and the inset shows the minimum with an expanded horizontal scale. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 06m 22.079s |
| Declination | −70° 14′ 04.58″ |
| Apparent magnitude (V) | Max: 11.9 Min: 18.2 |
| Characteristics | |
| Spectral type | DA + M8–9V |
| Variable type | SU UMa+Algol |
| Astrometry | |
| Radial velocity (Rv) | 120 km/s |
| Proper motion (μ) | RA: –38.830 mas/yr Dec.: 7.286 mas/yr |
| Parallax (π) | 11.039±0.0254 mas |
| Distance | 295.5 ± 0.7 ly (90.6 ± 0.2 pc) |
| Orbit | |
| Period (P) | 0.000172 yr |
| Semi-major axis (a) | 0.00213 AU |
| Eccentricity (e) | 0.0 |
| Inclination (i) | 83.3° |
| Orbit | |
| Period (P) | 0.0631209247 d |
| Semi-major axis (a) | 0.43 ± 0.03 Gm (0.00287 ± 0.00020 AU) |
| Inclination (i) | 79±2° |
| Semi-amplitude (K2) (secondary) | 470.0±2.7 km/s |
| Details | |
| Primary | |
| Mass | ≈0.7 M☉ |
| Radius | 0.011 R☉ |
| Luminosity | 0.0055 L☉ |
| Temperature | 15,000±2,000 K |
| Secondary | |
| Mass | 0.07 M☉ |
| Radius | 0.127 R☉ |
| Luminosity | 0.00117 L☉ |
| Temperature | 3,000 K |
| Rotational velocity (v sin i) | 108±6 km/s |
| Other designations | |
| AAVSO 1004-69, 2MASS J10062206-7014045 | |
| Database references | |
| SIMBAD | data |
OY Carinae is an eclipsing binary star system in the southern constellation of Carina, abbreviated OY Car. It is located at a distance of approximately 296 light-years from the Sun, and is classed as a cataclysmic variable. The system comprises a double eclipsing white dwarf and red dwarf that orbit each other every 1.51 hours, and possibly a yet unconfirmed third low-mass (substellar?) companion.