Chi Leonis information

χ Leonis
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Leo
Right ascension	11h 05m 01.02754s
Declination	+07° 20′ 09.6235″
Apparent magnitude (V)	4.63
Characteristics
Spectral type	F2III-IVv
U−B color index	+0.06
B−V color index	+0.33
Astrometry
Radial velocity (Rv)	+4.7 km/s
Proper motion (μ)	RA: −344.28 mas/yr ; Dec.: −47.65 mas/yr
Parallax (π)	34.49 ± 0.20 mas
Distance	94.6 ± 0.5 ly ; (29.0 ± 0.2 pc)
Absolute magnitude (MV)	+2.31
Details
Mass	1.62 M☉
Radius	1.99 R☉
Luminosity	9.9 L☉
Surface gravity (log g)	4.02 cgs
Temperature	7022±80 K
Metallicity [Fe/H]	+0.03 dex
Rotational velocity (v sin i)	25±1 km/s
Age	1.40 Gyr
Other designations
	χ Leo, 63 Leo, BD+08°2455, FK5 418, HD 96097, HIP 54182, HR 4310, SAO 118648
Database references
SIMBAD	data

Chi Leonis, Latinized from χ Leonis, is a double star in the constellation Leo. It is visible to the naked eye with an apparent visual magnitude of 4.63.^[2] The distance to this star, as determined using parallax measurements,^[1] is around 95 light years. It has an annual proper motion of 346 mas.^[9]

This is most likely a binary star system.^[10] The primary component is an evolved, F-type giant star with a stellar classification of F2III-IVv.^[3] It has an estimated 162%^[6] of the Sun's mass and nearly twice the Sun's radius.^[7] The companion is a magnitude 11.0 star at an angular separation of 4.1″ along a position angle of 264°, as of 1990.^[11]

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[Lepine2005-9] Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).

[Eggleton2008-10] Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).

[WDSC2014-11] Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Leo
Right ascension	11^h 05^m 01.02754^s^[1]
Declination	+07° 20′ 09.6235″^[1]
Apparent magnitude (V)	4.63^[2]
Characteristics
Spectral type	F2III-IVv^[3]
U−B color index	+0.06^[2]
B−V color index	+0.33^[2]
Astrometry

Radial velocity (R_v)	+4.7^[4] km/s
Proper motion (μ)	RA: −344.28^[1] mas/yr Dec.: −47.65^[1] mas/yr
Parallax (π)	34.49 ± 0.20 mas^[1]
Distance	94.6 ± 0.5 ly (29.0 ± 0.2 pc)
Absolute magnitude (M_V)	+2.31^[5]

Details

Mass	1.62^[6] `M`_☉
Radius	1.99^[7] `R`_☉
Luminosity	9.9^[5] `L`_☉
Surface gravity (log g)	4.02^[6] cgs
Temperature	7022±80^[6] K
Metallicity [Fe/H]	+0.03^[6] dex
Rotational velocity (v sin i)	25±1^[3] km/s
Age	1.40^[6] Gyr

Other designations
χ Leo, 63 Leo, BD+08°2455, FK5 418, HD 96097, HIP 54182, HR 4310, SAO 118648^[8]
Database references
SIMBAD	data

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