HD 88512, a white star in Ursa Major
HD 88512 is a white star in the constellation Ursa Major. At 373 light years away, it shines at an apparent visual magnitude of 6.63.
HD 88512 (HIP 50097)
HD 88512 is a white star in the constellation Ursa Major. At 373 light years away, it shines at an apparent visual magnitude of 6.63. It is moving through the Galaxy at a speed of 13.7 km/s relative to the Sun.
Sky position: RA 10h 13.7m, Dec +50° 29.8'
Common designations: GM Ursae Majoris, HD 88512, HIP 50097, Gaia DR3 847887193465209216
HD 88512 has the spectral type A4m. A-type stars are white stars with surface temperatures of roughly 7,500 to 10,000 K. Their spectra are dominated by strong hydrogen lines, and many of them rotate rapidly.
How to find HD 88512 in the sky
HD 88512 lies in Ursa Major. With a declination of +50° 29.8', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 40° S. Observers poleward of latitude 40° 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 March, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 88512
Astrometry and spectroscopy
| Right Ascension (J2000) | 153.43266065° (10h 13.7m) |
| Declination (J2000) | 50.49656336° (+50° 29.8') |
| Galactic Longitude | 164.06033649° |
| Galactic Latitude | 52.10526721° |
| Proper motion RA | 14.45 mas/yr |
| Proper motion Dec | 2.68 mas/yr |
| Parallax | 8.75 ± 0.08 mas |
| Spectral Type | A4m |
| Radial Velocity | -11.20 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 6.87 | 1.58 |
| V | 6.63 | 1.34 |
| J | 6.04 | 0.75 |
| H | 5.96 | 0.67 |
| K | 5.92 | 0.63 |
Colour index B-V: +0.24
Derivations
- Heliocentric distance: 114.30 pc (373 light years) (0.9% margin of error)
- Absolute visual magnitude: 1.34
- Transverse velocity: 8.0 km/s
- Space velocity relative to the Sun: 13.7 km/s
- Galactic position (X, Y, Z): -67.5 pc, 19.3 pc, 90.2 pc
- Galactic velocity (U, V, W): 12.9 km/s, 0.9 km/s, -4.8 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.