Delta Leporis

Delta Leporis which is latinized from δ Leporis is a solitary,^[10] orange-hued star in the southern constellation of Lepus. It is visible to the naked eye with an apparent visual magnitude of 3.85.^[2] Based upon an annual parallax shift of 28.68 mas,^[1] it is 114 light years distant from Earth.

Delta Leporis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Lepus
Right ascension	05h 51m 19.29613s[1]
Declination	−20° 52′ 44.7232″[1]
Apparent magnitude (V)	3.85[2]
Characteristics
Spectral type	K1 IV Fe−0.5[3] or K0 IIIb Fe−1.5 CH0.5[4]
U−B color index	+0.71[2]
B−V color index	+0.98[2]
Astrometry
Radial velocity (Rv)	+100.20[5] km/s
Proper motion (μ)	RA: +229.49[1] mas/yr Dec.: −648.41[1] mas/yr
Parallax (π)	28.68±0.17 mas[1]
Distance	113.7 ± 0.7 ly (34.9 ± 0.2 pc)
Absolute magnitude (MV)	+1.04[6]
Details
Mass	0.94[6][7] M☉
Radius	10.01±0.43[7] R☉
Luminosity	45.7[6] L☉
Surface gravity (log g)	2.41±0.10[7] cgs
Temperature	4,684±80[7] K
Metallicity [Fe/H]	−0.68±0.08[7] dex
Rotational velocity (v sin i)	0[8] km/s
Age	10.7[6] Gyr
Other designations
δ Lep, 15 Lep, BD−20°1211, FK5 222, GC 7362, HD 39364, HIP 27654, HR 2035, SAO 170926, LHS 1792[9]
Database references
SIMBAD	data

This is an old, evolved K-type star with an age of about 10.7 billion years.^[6] Keenan and McNeil (1989) classified it as K0 IIIb Fe−1.5 CH0.5,^[4] indicating it is a giant star showing a deficiency of iron and an excess of cyanogen in its atmosphere. However, Gray et al. (2006) listed it as K1 IV Fe−0.5,^[3] which would suggest a less evolved subgiant star. It may be a red clump star, which indicates it is generating energy through helium fusion at its core.^[11]

It has 94% of the Sun's mass, but a radius 10 times wider.^[7] It is radiating 46 times the Sun's luminosity from its photosphere^[6] at an effective temperature of 4,660 K.^[12] It is a Population II star.^[7]