DP Leonis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo |
| Right ascension | 11h 17m 15.92381s |
| Declination | +17° 57′ 41.6804″ |
| Apparent magnitude (V) | 17.5-19 |
| Characteristics | |
| Variable type | AM Her |
| Astrometry | |
| Radial velocity (Rv) | 0.0 km/s |
| Proper motion (μ) | RA: −28.700 mas/yr Dec.: −1.444 mas/yr |
| Parallax (π) | 3.2781±0.3110 mas |
| Distance | 990 ± 90 ly (310 ± 30 pc) |
| Orbit | |
| Period (P) | 0.0623628426 yr |
| Eccentricity (e) | 0.0 (fixed) |
| Inclination (i) | 79.5° |
| Details | |
| White dwarf | |
| Mass | 0.6 M☉ |
| Temperature | 13,500 K |
| Donor star | |
| Mass | 0.09 M☉ |
| Other designations | |
| DP Leo, X 11146+182 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
DP Leonis (abbreviated DP Leo) is a binary star system in the equatorial constellation of Leo. It is a variable star that ranges in apparent visual magnitude from 17.5 down to 19. The system is located at a distance of approximately 990 light-years from the Sun based on parallax. It is a cataclysmic variable star of the AM Herculis-type also known as polars. The system comprises an eclipsing white dwarf and red dwarf in tight orbit (nearly 1.5 hours) and an extrasolar planet. This eclipsing variable was discovered by P. Biermann and associates in 1982 as the optical counterpart to the EINSTEIN X-ray source E1114+182.