Deneb

Cygnus, the constellation in which Deneb is located.
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 41m 25.9s
Declination +45° 16′ 49″
Apparent magnitude (V) 1.25
Characteristics
Spectral type A2 Ia
U−B color index −0.24
B−V color index +0.09
Variable type Alpha Cyg
Astrometry
Radial velocity (Rv) −4.5 km/s
Proper motion (μ) RA: 1.99 mas/yr
Parallax (π) 2.29 ± 0.32mas
Distance approx. 1,400 ly
(approx. 440 pc)
Absolute magnitude (MV) −7.0
Details
Mass ~20 M
Radius 108 to 114R
Luminosity ~54,000 L
Temperature 8,525 K
Rotational velocity (v sin i) -4.5 km/s
Other designations
α Cygni, Alpha Cyg, 50 Cyg, Arided, Aridif, Gallina, Arrioph, HR 7924, BD +44°3541, HD 197345, SAO 49941, FK5: 777, HIP 102098.

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Deneb, which is released under the Creative Commons Attribution-Share-Alike License 3.0