HD 197027, a yellow main-sequence star in Capricornus
HD 197027 is a yellow main-sequence star in the constellation Capricornus. At 255 light years away, it shines at an apparent visual magnitude of 9.15.
HD 197027 (HIP 102152)
HD 197027 is a yellow main-sequence star in the constellation Capricornus. At 255 light years away, it shines at an apparent visual magnitude of 9.15. It is moving through the Galaxy at a speed of 78.6 km/s relative to the Sun.
Sky position: RA 20h 41.9m, Dec -27° 13.0'
Common designations: HD 197027, Gaia DR3 6799090223510802176, HIP 102152
HD 197027 has the spectral type G3V. 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 197027 in the sky
HD 197027 lies in Capricornus. With a declination of -27° 13.0', it is visible from the entire Southern Hemisphere and from the Northern Hemisphere up to about latitude 63° N. A telescope is needed to see it. It is highest in the sky at local midnight around August, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 197027
Astrometry and spectroscopy
| Right Ascension (J2000) | 310.47763994° (20h 41.9m) |
| Declination (J2000) | -27.21594873° (-27° 13.0') |
| Galactic Longitude | 17.39613745° |
| Galactic Latitude | -35.13067561° |
| Proper motion RA | 175.63 mas/yr |
| Proper motion Dec | -15.59 mas/yr |
| Parallax | 12.77 ± 0.02 mas |
| Spectral Type | G3V |
| Radial Velocity | -43.57 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 9.80 | 5.33 |
| V | 9.15 | 4.68 |
| J | 7.96 | 3.50 |
| H | 7.68 | 3.21 |
| K | 7.59 | 3.13 |
Colour index B-V: +0.65
Derivations
- Heliocentric distance: 78.30 pc (255 light years) (0.1% margin of error)
- Absolute visual magnitude: 4.68
- Transverse velocity: 65.4 km/s
- Space velocity relative to the Sun: 78.6 km/s
- Galactic position (X, Y, Z): 61.1 pc, 19.1 pc, -45.1 pc
- Galactic velocity (U, V, W): -72.9 km/s, -10.6 km/s, -27.6 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.