Aldulfine

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Star
Aldulfin
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation dolphin
Right ascension 20 h 33 m 12.77 s
declination + 11 ° 18 ′ 11.7 ″
Apparent brightness 4.03 (3.95 to 4.05) mag
Typing
B − V color index (−0.13) 
U − B color index (−0.47) 
R − I index (−0.13) 
Spectral class B6 IV
Astrometry
Radial velocity (−19.4 ± 0.7) km / s
parallax (9.87 ± 0.21)  mas
distance (330 ± 7)  ly
(100)  pc
Proper movement 
Rec. Share: (−11.96 ± 0.23)  mas / a
Dec. portion: (−28.97 ± 0.18)  mas / a
Physical Properties
Dimensions (4.8)  M
radius (4,4)  R
Luminosity

(750)  L

Effective temperature (14400)  K
Rotation time (4,4) d
Other names
and catalog entries
Bayer name ε Delphini
Flamsteed name 2 Delphini
Bonn survey BD + 10 ° 4321
Bright Star Catalog HR 7852 [1]
Henry Draper Catalog HD 195810 [2]
Hipparcos catalog HIP 101421 [3]
SAO catalog SAO 106230 [4]
Tycho catalog TYC 1096-1684-1 [5]
2MASS catalog 2MASS J20331277 + 1118118 [6]
Other names Aldulfin, Al Dulfin, Deneb Dulfim, FK5 768

Aldulfin , or Al Dulfin , Bayer name ε Delphini ( Epsilon Delphini ) is a star of the spectral class B6 in the constellation Delphinus . It has an apparent magnitude of 4.0 mag and is around 330 light years away. The star bears the historical proper name Deneb Dulfim (also Al Dhanab al Dulfim , from Arabic ذنب الدلفين, DMG ḏanab ad-dulfīn  'tail of the dolphin').

Individual evidence

  1. a b c d e f g h eps Del. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed March 8, 2020 .
  2. a b NSV 13137. In: VSX. AAVSO , accessed March 8, 2020 .
  3. a b c d e Deneb Dulfim. Jim Kaler, accessed March 8, 2020 .