Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Leo |
Right ascension | 09h 47m 33.4840s[1] |
Declination | +11° 25′ 43.823″[1] |
Apparent magnitude (V) | 4.4 - 11.3[2] |
Characteristics | |
Spectral type | M6e-M8IIIe-M9.5e[2] |
Apparent magnitude (J) | −0.7[3] |
B−V color index | 1.26 |
Variable type | Mira variable |
Astrometry | |
Proper motion (μ) | RA: 6.132[1] mas/yr Dec.: −53.097[1] mas/yr |
Parallax (π) | 14.0566 ± 0.8378 mas[1] |
Distance | 372 ly (114[4] pc) |
Details | |
Mass | 0.7[5] M☉ |
Radius | 320 – 350[6] R☉ |
Luminosity | 3,537[4] L☉ |
Temperature | 2,930 – 3,080[6] K |
Other designations | |
Database references | |
SIMBAD | data |
R Leonis is a red giant Mira-type variable star located approximately 370 light years away in the constellation Leo.
The apparent magnitude of R Leonis varies between 4.31 and 11.65 with a period of 312 days. At maximum it can be seen with the naked eye, while at minimum a telescope of at least 7 cm is needed. The star's effective temperature is estimated to be 2,930 – 3,080 kelvins and radius spans 320 solar radii (220,000,000 kilometres; 1.5 astronomical units),[6] roughly Mars's orbital zone.
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