| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 16h 03m 20.62179s[1] |
| Declination | −25° 51′ 54.8653″[1] |
| Apparent magnitude (V) | 4.973[2] |
| Characteristics | |
| Spectral type | K3 III[3] |
| B−V color index | 1.245[3] |
| Astrometry | |
| Radial velocity (Rv) | −37.88±0.15[1] km/s |
| Proper motion (μ) | RA: −66.608[1] mas/yr Dec.: −38.657[1] mas/yr |
| Parallax (π) | 14.3632 ± 0.2020 mas[1] |
| Distance | 227 ± 3 ly (69.6 ± 1.0 pc) |
| Absolute magnitude (MV) | 0.909[2] |
| Details | |
| Mass | 1.25[3] M☉ |
| Luminosity | 61.7[3] L☉ |
| Surface gravity (log g) | 2.29[2] cgs |
| Temperature | 4,370±22[3] K |
| Metallicity [Fe/H] | +0.01[2] dex |
| Age | 4.46[3] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 143787 is a single[5] star in the southern constellation of Scorpius. It is a fifth magnitude star – apparent visual magnitude of 4.973,[2] and hence is visible to the unaided eye. The distance to HD 143787 can be estimated from its annual parallax shift of 14.4 mas,[1] yielding a separation of 227 light years. It is moving closer to Earth with a heliocentric radial velocity of −37.9 km/s,[1] and should come within 106.4 ly in 1.2 million years.[6]
This is an evolved giant star with a stellar classification of K3 III.[3] It is a red clump giant, which means it is on the horizontal branch and is generating energy through helium fusion at its core.[2] At the age of 4.46[3] billion years, it has 1.25[3] times the mass of the Sun and is radiating 61.7[3] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,370 K.[3]
GaiaDR2 was invoked but never defined (see the help page).Liu2007 was invoked but never defined (see the help page).Luck2015 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).Anderson2012 was invoked but never defined (see the help page).