CW Leonis information

CW Leonis
	; CW Leonis in ultraviolet showing the bowshock
Observation data; Epoch J2000 Equinox J2000
Constellation	Leo
Right ascension	09h 47m 57.406s
Declination	+13° 16′ 43.56″
Apparent magnitude (V)	14.5 (var.)
Characteristics
Spectral type	C9,5e
Apparent magnitude (R)	10.96
Apparent magnitude (J)	7.34
Apparent magnitude (H)	4.04
Apparent magnitude (K)	1.19
Variable type	Mira
Astrometry
Proper motion (μ)	RA: 35±1 mas/yr ; Dec.: 12±1 mas/yr
Parallax (π)	10.56 ± 2.02 mas
Distance	approx. 310 ly ; (approx. 90 pc)
Details
Mass	0.7 - 0.9 M☉
Radius	560 R☉
Luminosity	8,500 (average), 11,850 (maximum) L☉
Temperature	2,300 (1,915 - 2,105) K
Other designations
	CW Leo, Peanut Nebula, IRC+10216, IRAS 09452+1330, PK 221+45 1, Zel 0945+135, RAFGL 1381, 2MASS J09475740+1316435, SCM 50
Database references
SIMBAD	data

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]

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Observation data Epoch J2000 Equinox J2000
CW Leonis in ultraviolet showing the bowshock
Constellation	Leo
Right ascension	09^h 47^m 57.406^s^[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
CW Leo, Peanut Nebula, IRC+10216, IRAS 09452+1330, PK 221+45 1, Zel 0945+135, RAFGL 1381, 2MASS J09475740+1316435, SCM 50^[9]
Database references
SIMBAD	data

CW Leonis information

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