HD 216770, a yellow main-sequence star in Piscis Austrinus
HD 216770 is a yellow main-sequence star in the constellation Piscis Austrinus. At 120 light years away, it shines at an apparent visual magnitude of 8.10.
HD 216770 (HIP 113238)
HD 216770 is a yellow main-sequence star in the constellation Piscis Austrinus. At 120 light years away, it shines at an apparent visual magnitude of 8.10. It is moving through the Galaxy at a speed of 58.9 km/s relative to the Sun.
Sky position: RA 22h 55.9m, Dec -26° 39.5'
Common designations: HD 216770, Gaia DR3 6610107504955838336, HIP 113238
HD 216770 has the spectral type G9VCN+1. G-type stars are yellow stars of about 5,300 to 6,000 K, the same class as the Sun. Their spectra show strong lines of ionized calcium and many metals. Its luminosity class V means it is a main-sequence (dwarf) star, still fusing hydrogen into helium in its core like the Sun.
How to find HD 216770 in the sky
HD 216770 lies in Piscis Austrinus. With a declination of -26° 39.5', it is visible from the entire Southern Hemisphere and from the Northern Hemisphere up to about latitude 63° N. It is just beyond naked-eye visibility; binoculars will show it easily. It is highest in the sky at local midnight around September, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 216770
Astrometry and spectroscopy
| Right Ascension (J2000) | 343.97378516° (22h 55.9m) |
| Declination (J2000) | -26.65876230° (-26° 39.5') |
| Galactic Longitude | 27.30871399° |
| Galactic Latitude | -64.29110437° |
| Proper motion RA | 226.24 mas/yr |
| Proper motion Dec | -177.99 mas/yr |
| Parallax | 27.29 ± 0.02 mas |
| Spectral Type | G9VCN+1 |
| Radial Velocity | 31.14 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 8.92 | 6.10 |
| V | 8.10 | 5.28 |
| J | 6.75 | 3.93 |
| H | 6.43 | 3.61 |
| K | 6.31 | 3.49 |
Colour index B-V: +0.82
Derivations
- Heliocentric distance: 36.64 pc (120 light years) (0.1% margin of error)
- Absolute visual magnitude: 5.28
- Transverse velocity: 50.0 km/s
- Space velocity relative to the Sun: 58.9 km/s
- Galactic position (X, Y, Z): 14.1 pc, 7.3 pc, -33.0 pc
- Galactic velocity (U, V, W): -10.8 km/s, -34.2 km/s, -46.7 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.