HD 238686, a yellow-white star in Draco
HD 238686 is a yellow-white star in the constellation Draco. At 465 light years away, it shines at an apparent visual magnitude of 8.98.
HD 238686 (HIP 85163)
HD 238686 is a yellow-white star in the constellation Draco. At 465 light years away, it shines at an apparent visual magnitude of 8.98. It is moving through the Galaxy at a speed of 9.4 km/s relative to the Sun.
Sky position: RA 17h 24.2m, Dec +58° 41.9'
Common designations: HD 238686, HIP 85163, Gaia DR3 1433266599977352448
HD 238686 has the spectral type F5. F-type stars are yellow-white stars of about 6,000 to 7,500 K, slightly hotter and more massive than the Sun. Their hydrogen lines are weaker than in A stars and metal lines become prominent.
How to find HD 238686 in the sky
HD 238686 lies in Draco. With a declination of +58° 41.9', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 31° S. Observers poleward of latitude 31° N see it as circumpolar: it never sets. It is just beyond naked-eye visibility; binoculars will show it easily. It is highest in the sky at local midnight around July, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 238686
Astrometry and spectroscopy
| Right Ascension (J2000) | 261.05540226° (17h 24.2m) |
| Declination (J2000) | 58.69867623° (+58° 41.9') |
| Galactic Longitude | 87.27896761° |
| Galactic Latitude | 34.14981834° |
| Proper motion RA | -9.39 mas/yr |
| Proper motion Dec | 2.56 mas/yr |
| Parallax | 7.02 ± 0.01 mas |
| Spectral Type | F5 |
| Radial Velocity | -6.78 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 9.37 | 3.60 |
| V | 8.98 | 3.21 |
| J | 8.19 | 2.43 |
| H | 7.98 | 2.21 |
| K | 7.97 | 2.20 |
Colour index B-V: +0.38
Derivations
- Heliocentric distance: 142.47 pc (465 light years) (0.2% margin of error)
- Absolute visual magnitude: 3.21
- Transverse velocity: 6.6 km/s
- Space velocity relative to the Sun: 9.4 km/s
- Galactic position (X, Y, Z): 5.6 pc, 117.8 pc, 80.0 pc
- Galactic velocity (U, V, W): -2.5 km/s, -9.0 km/s, 1.4 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.