Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 20h 24m 37.49846s[1] |
Declination | +01° 04′ 06.2592″[1] |
Apparent magnitude (V) | 6.14[2] |
Characteristics | |
Spectral type | B9V[3] |
U−B color index | −0.14[2] |
B−V color index | −0.04[2] |
Astrometry | |
Radial velocity (Rv) | −9.6±0.9[4] km/s |
Proper motion (μ) | RA: +8.37[1] mas/yr Dec.: +5.26[1] mas/yr |
Parallax (π) | 4.04 ± 0.39 mas[1] |
Distance | 810 ± 80 ly (250 ± 20 pc) |
Details | |
Luminosity | 173[5] L☉ |
Temperature | 8,822[5] K |
Rotational velocity (v sin i) | 222[6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 194244 is a variable Be star[7] in the equatorial constellation of Aquila. With an apparent magnitude of 6.14, according to the Bortle scale it is faintly visible to the naked eye from rural skies on a dark night.
van Leeuwen2007
was invoked but never defined (see the help page).mnassa23_175
was invoked but never defined (see the help page).aj74_375
was invoked but never defined (see the help page).Gontcharov
was invoked but never defined (see the help page).Mcdonald
was invoked but never defined (see the help page).aaa463_2_671
was invoked but never defined (see the help page).apjss156_2_237
was invoked but never defined (see the help page).