HD 219077
HD 219077 is a faint, yellow-hued star in the southern constellation of Tucana. It has an apparent visual magnitude of +6.12, which is near the lower limit on stars visible to the naked eye. Based upon an annual parallax shift of 34.25 mas as seen from Earth, it lies 95 light years from the Sun. HD 219077 is moving closer to the Sun with a radial velocity of −31.01, and has a relatively high proper motion.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Tucana |
| Right ascension | 23h 14m 06.587712s |
| Declination | −62° 42′ 00.008076″ |
| Apparent magnitude (V) | +6.12 |
| Characteristics | |
| Spectral type | G8 V |
| B−V color index | 0.787 |
| Astrometry | |
| Radial velocity (Rv) | −31.05±0.12 km/s |
| Proper motion (μ) | RA: 478.297±0.021 mas/yr Dec.: −424.433±0.027 mas/yr |
| Parallax (π) | 34.2500 ± 0.0223 mas |
| Distance | 95.23 ± 0.06 ly (29.20 ± 0.02 pc) |
| Absolute magnitude (MV) | +3.78 |
| Details | |
| Mass | 1.05±0.02 M☉ |
| Radius | 1.91±0.03 R☉ |
| Luminosity (bolometric) | 2.66 L☉ |
| Surface gravity (log g) | 4.00±0.03 cgs |
| Temperature | 5,362±18 K |
| Metallicity [Fe/H] | −0.13±0.01 dex |
| Rotation | 49±4 d |
| Rotational velocity (v sin i) | 1.46 km/s |
| Age | 8.9±0.3 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an ordinary G-type main-sequence star with a stellar classification of G8 V. It has 1.05 times the mass of the Sun and 1.91 times the Sun's radius. The star is older than the Sun with an estimated age of 8.9 billion years and is spinning slowly with rotation period of around 47 days. It is radiating 2.66 times the Sun's luminosity from its photosphere at an effective temperature of 5,362 K.