Denebola

Database links to β Leonis / Denebola

Multiple star β Leonis / Denebola
The positions of the components to each other (A = Denebola)
AladinLite
Observation dates equinox :  J2000.0 , epoch : J2000.0
Constellation	lion
Right ascension	11 h 49 m 3.58 s
declination	+ 14 ° 34 ′ 19.4 ″
Apparent brightness	2.14 mag
Typing
B − V color index	+0.09
U − B color index	+0.07
R − I index	+0.02
Spectral class	A3 V
Variable star type	DTCTC
Astrometry
Radial velocity	(−0.2 ± 0.5) km / s
parallax	(90.91 ± 0.52)  mas
distance	(35.88 ± 0.21)  ly (11.00 ± 0.06)  pc
Visual absolute brightness M vis	+1.93 mag
Proper movement
Rec. Share:	(−497.68 ± 0.87)  mas / a
Dec. portion:	(−114.67 ± 0.44)  mas / a
Physical Properties
radius	1.728  R ☉
Luminosity	vis. approx. 15  L ☉
Effective temperature	approx. 9000  K
Other names and catalog entries
Bayer name β Leonis Flamsteed name 94 Leonis Bonn survey BD + 15 ° 2383 Bright Star Catalog HR 4534 [1] Henry Draper Catalog HD 102647 [2] Gliese catalog FY 448 [3] Hipparcos catalog HIP 57632 [4] SAO catalog SAO 99809 [5] Tycho catalog TYC 870-988-1 [6] 2MASS catalog 2MASS J11490366 + 1434197 [7] Other names FK5 444, USNO-B1.0 1045-00205720
annotation
↑ Calculated from apparent brightness and distance.

Denebola or β Leonis is the third brightest star in the constellation Leo with an apparent magnitude of 2.14 mag . It belongs to the spectral class A3V and is 36 light years away. The star is surrounded by a disk of dust. No companions of Beta Leonis are proven; the WDS lists three components with angular distances between 40 ″ and 240 ″.

The name Denebola comes from the Arabic and is an abbreviation ofذنب الاسد ðanab al-asad , which means something like the lion's tail .

The IAU has the historical proper names on 30 June 2016 Denebola defined as standardized proper names. However, it should be noted that this proper name is only valid for the visually brightest component A. All other stars or components of this multiple star system therefore have no proper names (yet).

Components

Denebola is a quadruple system according to the “Catalog of Components of Double & Multiple stars”.

The four-fold system consists of:

component	Right ascension	declination	vis. Brightness (mag)	Reference point	Distance from Ref. Point ( arcsec )	Direction from Ref. Point
A.	11 h 49 m 03.6 s	+ 14 ° 34 ′ 19 ″	2.2
B.	11 h 49 m 06.4 s	+ 14 ° 35 ′ 10 ″	15.7	A.	39.7	346 °
C.	11 h 49 m 06.3 s	+ 14 ° 35 ′ 50 ″	13.2	A.	80.3	358 °
D.	11 h 48 m 59.1 s	+ 14 ° 30 ′ 27 ″	8.5	A.	264.0	203 °

See also

• List of the brightest stars

Web links

• http://stars.astro.illinois.edu/sow/denebola.html

Individual evidence

1. ↑ ^{a b c d} Hipparcos catalog (ESA 1997)
2. ↑ ^{a b} bet Leo. In: VSX. AAVSO, accessed September 29, 2018 . 
3. ↑ ^{a b c} Bright Star Catalog
4. ↑ Pulkovo radial velocities for 35493 HIP stars
5. ↑ ^{a b c} Hipparcos, the New Reduction (van Leeuwen, 2007)
6. ^ Di Folco, E .; Thévenin, F .; Kervella, P .; Domiciano de Souza, A .; Coudé du Foresto, V .; Ségransan, D .; Morel, P .: VLTI near-IR interferometric observations of Vega-like stars . In: Astronomy and Astrophysics . 426, 2004, pp. 601-617. bibcode : 1998RPPh ... 61 ... 77K . doi : 10.1051 / 0004-6361: 20047189 .
7. ↑ Akeson et al .: Dust in the inner regions of debris disks around A stars . In: Astrophysical Journal . 691, 2009, pp. 601-617. bibcode : 2009ApJ ... 691.1896A . doi : 10.1088 / 0004-637X / 691/2/1896 .
8. ↑ Bulletin of the IAU Working Group on Star Names, No. 1, July 2016. (PDF) Retrieved November 9, 2016 (English, 184 KiB). 
9. ↑ CCDM (Catalog of Components of Double and multiple stars (Dommanget + 2002)) online query of Vizierdatenbank