Aladfar

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Star
Aladfar (η Lyrae)
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation lyre
Right ascension 19 h 13 m 45.49 s
declination + 39 ° 08 ′ 45.4 ″
Apparent brightness 4.40 mag
Typing
B − V color index (−0.15) 
U − B color index (−0.66) 
Spectral class B2.5 IV
Variable star type Yes 
Astrometry
Radial velocity (−8.1 ± 0.9) km / s
parallax (3.80 ± 0.26)  mas
distance (860 ± 60)  ly
(260)  pc
Proper movement 
Rec. Share: (−0.60 ± 0.47)  mas / a
Dec. portion: (1.54 ± 0.56)  mas / a
Physical Properties
Other names
and catalog entries
Bayer name η Lyrae
Flamsteed name 20 lyre
Bonn survey BD + 38 ° 3490
Bright Star Catalog HR 7298 [1]
Henry Draper Catalog HD 180163 [2]
Hipparcos catalog HIP 94481 [3]
SAO catalog SAO 68010 [4]
Tycho catalog TYC 3121-2285-1 [5]
2MASS catalog 2MASS J19134547 + 3908454 [6]
Other names Aladfar

Aladfar is the name of the star η Lyrae (Eta Lyrae). Aladfar belongs to the spectral class B2.5IV and has an apparent brightness of +4.39 mag. It is about 860 light years away . The name (Arabic) means "claws (of a descending eagle)".

Web links

Individual evidence

  1. a b c d e f g h eta Lyr. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed September 14, 2018 .