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

References

1. "RX Leporis". SIMBAD Astronomical Database. Retrieved 2012-08-31.
2. "GCVS Query=RX Lep". General Catalogue of Variable Stars @ Sternberg Astronomical Institute, Moscow, Russia. Retrieved 2012-08-31.
3. "RX Leporis". AAVSO: Variable Star Plotter (VSP). Archived from the original on August 6, 2011. Retrieved 2012-08-31.
4. Jim Kaler. "IOTA LEP (Iota Leporis) and RX Lep". University of Illinois. Retrieved 2012-08-31.
5. Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. (August 2001). "Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods". Publications of the Astronomical Society of the Pacific. 113 (786): 983–996. Bibcode:2001PASP..113..983P. doi:10.1086/322153. S2CID 14609175.

External links

• RX Leporis on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• AAVSO: Quick Look View of AAVSO Observations (get recent magnitude estimates for RX Lep)