HD 194244
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 24m 37.49817s |
| Declination | +01° 04′ 06.2574″ |
| Apparent magnitude (V) | 6.14 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | B9V |
| U−B color index | −0.14 |
| B−V color index | −0.04 |
| Astrometry | |
| Radial velocity (Rv) | −9.6±0.9 km/s |
| Proper motion (μ) | RA: +7.834 mas/yr Dec.: +4.935 mas/yr |
| Parallax (π) | 4.0349±0.0.428 mas |
| Distance | 808 ± 0 ly (248 ± 0 pc) |
| Absolute magnitude (MV) | −0.80 |
| Details | |
| Mass | 2.5 M☉ |
| Radius | 4.9 R☉ |
| Luminosity | 238 L☉ |
| Surface gravity (log g) | 3.48 cgs |
| Temperature | 10,233 K |
| Metallicity [Fe/H] | −0.22 dex |
| Rotation | 27.15 |
| Rotational velocity (v sin i) | 222 km/s |
| Age | 243 Myr |
| Other designations | |
| BD+00°4495, HD 194244, HIP 100664, HR 7803, SAO 125769 | |
| Database references | |
| SIMBAD | data |
HD 194244 is a variable Be star 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.