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CW Leonis
Star in the constellation Leo / From Wikipedia, the free encyclopedia
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CW Leonis or IRC +10216 is a variable carbon star that is embedded in a thick dust envelope. It was first discovered in 1969 by a group of astronomers led by Eric Becklin, based upon infrared observations made with the 62-inch Caltech Infrared Telescope at Mount Wilson Observatory. Its energy is emitted mostly at infrared wavelengths. At a wavelength of 5 μm, it was found to have the highest flux of any object outside the Solar System.[10]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Leo |
Right ascension | 09h 47m 57.406s[1] |
Declination | +13° 16′ 43.56″[1] |
Apparent magnitude (V) | 14.5 (var.)[2] |
Characteristics | |
Spectral type | C9,5e[3] |
Apparent magnitude (R) | 10.96[1] |
Apparent magnitude (J) | 7.34[1] |
Apparent magnitude (H) | 4.04[1] |
Apparent magnitude (K) | 1.19[1] |
Variable type | Mira[4] |
Astrometry | |
Proper motion (μ) | RA: 35±1 mas/yr Dec.: 12±1[5] mas/yr |
Parallax (π) | 10.56 ± 2.02 mas[6] |
Distance | approx. 310 ly (approx. 90 pc) |
Details | |
Mass | 0.7 - 0.9[5] M☉ |
Radius | 560[7] R☉ |
Luminosity | 8,500 (average), 11,850 (maximum)[7] L☉ |
Temperature | 2,300[7] (1,915 - 2,105)[8] K |
Other designations | |
Database references | |
SIMBAD | data |
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