Denebola information

Denebola
	Location of β Leonis (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Leo
Pronunciation	/dəˈnɛbələ/,
Right ascension	11h 49m 03.57834s
Declination	+14° 34′ 19.4090″
Apparent magnitude (V)	2.14
Characteristics
Spectral type	A3Va
U−B color index	+0.07
B−V color index	+0.09
Variable type	δ Sct
Astrometry
Radial velocity (Rv)	−0.2 km/s
Proper motion (μ)	RA: −497.68 mas/yr ; Dec.: −114.67 mas/yr
Parallax (π)	90.91 ± 0.52 mas
Distance	35.9 ± 0.2 ly ; (11.00 ± 0.06 pc)
Absolute magnitude (MV)	+1.93
Details
Mass	1.78 M☉
Radius	1.728 R☉
Luminosity	15 L☉
Surface gravity (log g)	4.0 cgs
Temperature	8,500 K
Metallicity [Fe/H]	+0.00 dex
Rotational velocity (v sin i)	128 km/s
Age	100–380 Myr
Other designations
	Deneb Aleet, β Leonis, 94 Leo, BD+15°2383, FK5 444, GJ 448, HD 102647, HIP 57632, HR 4534, SAO 99809, LHS 2462, LTT 13249
Database references
SIMBAD	data

Denebola is the second-brightest individual star in the zodiac constellation of Leo.^[13] It is the easternmost of the bright stars of Leo. It has the Bayer designation Beta Leonis or β Leonis, which are abbreviated Beta Leo or β Leo. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of 36 light-years (11 parsecs) from the Sun. Its apparent visual magnitude is 2.14, making it readily visible to the naked eye. Denebola is a Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours.

^ "Denebola". Merriam-Webster.com Dictionary.
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^ The two components of the γ Leonis double star, which are unresolved to the naked eye, have a combined magnitude brighter than it.

[1] "Denebola". Merriam-Webster.com Dictionary.

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[13] The two components of the γ Leonis double star, which are unresolved to the naked eye, have a combined magnitude brighter than it.

Observation data Epoch J2000 Equinox J2000
Location of β Leonis (circled)
Constellation	Leo
Pronunciation	/dəˈnɛbələ/,^[1]
Right ascension	11^h 49^m 03.57834^s^[2]
Declination	+14° 34′ 19.4090″^[2]
Apparent magnitude (V)	2.14^[3]
Characteristics
Spectral type	A3Va^[4]
U−B color index	+0.07^[5]
B−V color index	+0.09^[5]
Variable type	δ Sct^[3]
Astrometry

Radial velocity (R_v)	−0.2^[6] km/s
Proper motion (μ)	RA: −497.68^[2] mas/yr Dec.: −114.67^[2] mas/yr
Parallax (π)	90.91 ± 0.52 mas^[2]
Distance	35.9 ± 0.2 ly (11.00 ± 0.06 pc)
Absolute magnitude (M_V)	+1.93^[7]

Details

Mass	1.78^[8] `M`_☉
Radius	1.728^[8] `R`_☉
Luminosity	15^[8] `L`_☉
Surface gravity (log g)	4.0^[9] cgs
Temperature	8,500^[9] K
Metallicity [Fe/H]	+0.00^[8] dex
Rotational velocity (v sin i)	128^[10] km/s
Age	100–380^[8] Myr

Other designations
Deneb Aleet, β Leonis, 94 Leo, BD+15°2383, FK5 444, GJ 448, HD 102647, HIP 57632, HR 4534, SAO 99809, LHS 2462, LTT 13249^[11]^[12]
Database references
SIMBAD	data

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