RX Leporis

RX Leporis (RX Lep) is a star in the constellation of Lepus. It is a red giant and is a semi-regular pulsating star.

A visual band light curve for RX Leporis. The main plot shows the long-term brightness variation, and the inset plot shows the short-term variation. Adapted from Percy et al. (2001)^[5]

RX Leporis

Red giant RX Lep is 4 degrees south of Rigel
Observation data Epoch J2000      Equinox J2000
Constellation	Lepus
Right ascension	05h 11m 22.87s[1]
Declination	−11° 50′ 56.72″
Apparent magnitude (V)	5–7.4[2][3]
Characteristics
Spectral type	M6.2III[1][2][3]
Variable type	Semi-regular pulsating (SRB)[1][2]
Astrometry
Radial velocity (Rv)	46.1[1] km/s
Parallax (π)	6.71±0.44 mas[1]
Distance	490 ± 30 ly (149 ± 10 pc)
Details
Mass	1–4[4] M☉
Radius	100–200[4] R☉
Luminosity	1500–4500[4] L☉
Temperature	3300[4] K
Other designations
HD 33664, HR 1693, HIP 24169, BD–12° 1092, SAO 150206[1]
Database references
SIMBAD	data

It has an apparent magnitude that varies from about 5 to 7.4.^[2] At its brightest it is dimly visible to the naked eye, and at its dimmest can be located with binoculars. In the sky it is about 4 degrees south of Rigel and is located next to Iota Leporis.

See also

• List of variable stars