DP Leonis

DP Leonis

A white-light light curve for DP Leonis, adapted from Beuermann et al. (2014)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension 11h 17m 15.92381s[2]
Declination +17° 57′ 41.6804″[2]
Apparent magnitude (V) 17.5-19[3]
Characteristics
Variable type AM Her[3]
Astrometry
Radial velocity (Rv)0.0[4] km/s
Proper motion (μ) RA: −28.700 mas/yr[2]
Dec.: −1.444 mas/yr[2]
Parallax (π)3.2781 ± 0.3110 mas[2]
Distance990 ± 90 ly
(310 ± 30 pc)
Orbit
Period (P)0.0623628426[5] yr
Eccentricity (e)0.0 (fixed)
Inclination (i)79.5[6]°
Details
White dwarf
Mass0.6[6] M☉
Temperature13,500[5] K
Donor star
Mass0.09[6] M☉
Other designations
DP Leo,[7] X 11146+182[3]
Database references
SIMBADdata
Exoplanet Archivedata

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.[3] The system is located at a distance of approximately 990 light-years from the Sun based on parallax.[2] 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.[8] This eclipsing variable was discovered by P. Biermann and associates in 1982 as the optical counterpart to the EINSTEIN X-ray source E1114+182.[9]

  1. ^ Cite error: The named reference Beuer2014 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference var was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Duflot_et_al_1995 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Beuermann2011 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Schwope2002 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Qian2010 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Biermann_et_al_1985 was invoked but never defined (see the help page).