HD 191984

HD 191984
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 12m 35.12436s[1]
Declination +00° 52′ 01.3864″[1]
Apparent magnitude (V) 6.246[2]
Characteristics
Spectral type B9p CR(EU SR)[3] + A0[4]
U−B color index −0.033[2]
B−V color index +0.090[2]
Astrometry
Radial velocity (Rv)−19[5] km/s
Proper motion (μ) RA: +2.12[1] mas/yr
Dec.: −20.85[1] mas/yr
Parallax (π)5.54 ± 1.10 mas
Distanceapprox. 600 ly
(approx. 180 pc)
Details
Luminosity82[6] L☉
Temperature8,477[6] K
Rotational velocity (v sin i)150[7] km/s
Other designations
BD+00° 4444, HD 191984, HIP 99585, HR 7717.
Database references
SIMBADdata
Database references
SIMBADdata

HD 191984 is a double star in the equatorial constellation of Aquila. As of 2011, the components have an angular separation of 2.52″ along a position angle of 205.7°.[8]

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