Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Aquila |
Right ascension | 18h 58m 14.7474s |
Declination | +17° 21′ 39.283″ |
Apparent magnitude (V) | 5.31 |
Characteristics | |
Spectral type | F5Iab |
U−B color index | 0.43 |
B−V color index | 0.8 |
Variable type | Cepheid variable |
Astrometry | |
Radial velocity (Rv) | -22 km/s |
Proper motion (μ) | RA: 0.08 mas/yr Dec.: -9.98 mas/yr |
Parallax (π) | 1.32 ± 0.72 mas |
Distance | approx. 2000 ly (approx. 800 pc) |
Absolute magnitude (MV) | -4.1 |
Details | |
Mass | 7 M☉ |
Radius | 55 R☉ |
Luminosity | 5000 L☉ |
Temperature | 6640 K |
Rotational velocity (v sin i) | 17 km/s |
Other designations | |
Database references | |
SIMBAD | data |
FF Aquilae (CHA 82Aa) is a classical cepheid variable (delta Cep type).