Kappa Leporis

Kappa Leporis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension 05h 13m 13.87761s[1]
Declination −12° 56′ 28.6463″[1]
Apparent magnitude (V) 4.43 + 7.00[2]
Characteristics
Spectral type B9 V[3]
U−B color index −0.34[4]
B−V color index −0.10[4]
Astrometry
Radial velocity (Rv)+20.8±1.0[5] km/s
Proper motion (μ) RA: −12.29[1] mas/yr
Dec.: −0.79[1] mas/yr
Parallax (π)4.48 ± 0.58 mas[1]
Distanceapprox. 730 ly
(approx. 220 pc)
Absolute magnitude (MV)−2.34[6]
Details[3]
κ Lep A
Mass4.86±0.39 M☉
Radius2.6[7] R☉
Luminosity1,346 L☉
Surface gravity (log g)3.44[8] cgs
Temperature11,588 K
Metallicity [Fe/H]−0.07[8] dex
Rotational velocity (v sin i)135 km/s
Other designations
κ Lep, 4 Lep, BD−13° 1092, GC 6387, HD 33949, HIP 24327, HR 1705, SAO 150239, CCDM J05132-1256AB[9]
Database references
SIMBADdata

Kappa Leporis, Latinized from κ Leporis, is a binary star[10] system in the southern constellation of Lepus. The pair have apparent visual magnitudes of 4.43 and 7.00, with the former being bright enough to be seen with the naked eye. As of 2000, they had an angular separation of 2.179 arc seconds along a position angle of 357.3°. Based upon an annual parallax shift of 4.48 mas as measured from Earth,[1] the system is located roughly 730 light years from the Sun. The system is travelling away from the Sun with a radial velocity of +20.8 km/s.[5]

The brighter, blue-white hued member of the system, component A, is a B-type main-sequence star with a stellar classification of B9 V.[3] It has nearly five[3] times the mass of the Sun and around 2.6[7] times the Sun's radius. The star is radiating 1,346 times the Sun's luminosity from its photosphere at an effective temperature of 11,588 K.[3] It displays an infrared excess at a wavelength of 12μm, making it a candidate host for a circumstellar debris disk.[11]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Fabricius2000 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Saffe2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Mannings1998 was invoked but never defined (see the help page).