HD 190984
HD 190984, also known as HIP 99496, is a star located in the southern circumpolar constellation Pavo, the peacock. It has an apparent magnitude of 8.76, making it readily visible in small telescopes, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 486 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 20.3 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 20h 11m 30.71538s |
| Declination | −64° 37′ 13.6853″ |
| Apparent magnitude (V) | 8.76 |
| Characteristics | |
| Spectral type | F8 V |
| U−B color index | +0.02 |
| B−V color index | +0.54 |
| Astrometry | |
| Radial velocity (Rv) | +20.48±0.14 km/s |
| Proper motion (μ) | RA: +0.193 mas/yr Dec.: +45.355 mas/yr |
| Parallax (π) | 6.7060 ± 0.0153 mas |
| Distance | 486 ± 1 ly (149.1 ± 0.3 pc) |
| Absolute magnitude (MV) | +2.25 |
| Details | |
| Mass | 1.15±0.01 M☉ |
| Radius | 2.31±0.09 R☉ |
| Luminosity | 5.88±1.01 L☉ |
| Surface gravity (log g) | 3.78±0.03 cgs |
| Temperature | 6,007±25 K |
| Metallicity | −0.49±0.02 |
| Rotational velocity (v sin i) | 5 km/s |
| Age | 4.44±0.10 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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