Iota Leporis

Iota Leporis

A light curve for AM Leporis, adapted from Huélamo et al. (2004)[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Lepus
Right ascension 05h 12m 17.90190s[2]
Declination −11° 52′ 09.1863″[2]
Apparent magnitude (V) 4.45[3]
Characteristics
Spectral type B7.5 Vn[4] + K7.2 XR? + G8 Ve[5]
U−B color index −0.40[3]
B−V color index −0.10[3]
Astrometry
Radial velocity (Rv)+23.50[6] km/s
Proper motion (μ) RA: +24.39[2] mas/yr
Dec.: −31.02[2] mas/yr
Parallax (π)14.07 ± 0.16 mas[2]
Distance232 ± 3 ly
(71.1 ± 0.8 pc)
Absolute magnitude (MV)0.01[7]
Details
ι Lep A
Mass3.37±0.02[8] M☉
Luminosity153[8] L☉
Surface gravity (log g)4.25[9] cgs
Temperature13,781±469[9] K
Rotational velocity (v sin i)185[9] km/s
Age94[7] Myr
Other designations
ι Lep, 3 Lep, BD−12° 1095, GC 6374, HD 33802, HIP 24244, HR 1696, SAO 150223, CCDM J05123-1152A, WDS J05123-1152A[10]
Database references
SIMBADdata

Iota Leporis (ι Leporis) is a triple star[5] system in the southern constellation of Lepus. It is visible to the naked eye as a point source of blue-white light with an apparent visual magnitude of 4.45.[3] Based upon an annual parallax shift of 14.07 mas as measured from Earth,[2] the system is located roughly 232 light years from the Sun.

The primary, designated component A, is a B-type main-sequence star with a stellar classification of B7.5 Vn,[4] where the 'n' suffix indicates "nebulous" absorption lines caused by rotation. It is about 94[7] million years old and has a high rate of spin with a projected rotational velocity of 185 km/s.[9] With an estimated 3.4[8] times the mass of the Sun, it is radiating 153[8] times the Sun's luminosity from its photosphere at an effective temperature of around 13,781 K.[9]

There is a close companion that is a source of X-ray emission. Most likely this star has at least 1.05 times the mass of the Sun.[7] The third component, AM Leporis, is a BY Draconis variable[11] of apparent magnitude 9.92,[3] and spectral type G8Ve[12] at an angular separation of 12.7".[13]

  1. ^ Cite error: The named reference Huelamo was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Garrison1994 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Kharchenko2007 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Hubrig2001 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  9. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Kazarovets2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gahm1983 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference CCDM was invoked but never defined (see the help page).