| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 04m 57.87462s[1] |
| Declination | +31° 44′ 38.6538″[1] |
| Apparent magnitude (V) | 5.63[2] |
| Characteristics | |
| Spectral type | M0III[3] |
| B−V color index | 1.548±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | 3.47±0.14[2] km/s |
| Proper motion (μ) | RA: +74.989[1] mas/yr Dec.: −76.884[1] mas/yr |
| Parallax (π) | 5.9150 ± 0.0831 mas[1] |
| Distance | 551 ± 8 ly (169 ± 2 pc) |
| Absolute magnitude (MV) | −0.75[2] |
| Details | |
| Radius | 42.27+1.26 −4.39[1] R☉ |
| Luminosity | 387.9±6.8[1] L☉ |
| Temperature | 3,940+233 −58[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 177808 is a 6th magnitude star in the constellation Lyra, approximately 610 light years away from Earth. It is a solitary[5] red giant star of the spectral type M0III, meaning it possesses a surface temperature of around 3,940 kelvins. It is therefore much larger and brighter than the Sun, yet cooler in comparison.
GaiaDR2 was invoked but never defined (see the help page).Anderson2012 was invoked but never defined (see the help page).Roman1955 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).Eggleton2008 was invoked but never defined (see the help page).