HD 140101, a white star in Corona Borealis
HD 140101 is a white star in the constellation Corona Borealis. At 515 light years away, it shines at an apparent visual magnitude of 7.17.
HD 140101 (HIP 76773)
HD 140101 is a white star in the constellation Corona Borealis. At 515 light years away, it shines at an apparent visual magnitude of 7.17. It is moving through the Galaxy at a speed of 24.8 km/s relative to the Sun.
Sky position: RA 15h 40.5m, Dec +37° 1.0'
Common designations: HD 140101, HIP 76773, Gaia DR3 1376207714635523456
HD 140101 has the spectral type A0. 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 140101 in the sky
HD 140101 lies in Corona Borealis. With a declination of +37° 1.0', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 53° S. Observers poleward of latitude 53° 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 June, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 140101
Astrometry and spectroscopy
| Right Ascension (J2000) | 235.12591486° (15h 40.5m) |
| Declination (J2000) | 37.01698930° (+37° 1.0') |
| Galactic Longitude | 59.31533243° |
| Galactic Latitude | 53.16836815° |
| Proper motion RA | -14.96 mas/yr |
| Proper motion Dec | -6.07 mas/yr |
| Parallax | 6.33 ± 0.03 mas |
| Spectral Type | A0 |
| Radial Velocity | -21.66 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 7.17 | 1.18 |
| V | 7.17 | 1.18 |
| I | 7.13 | 1.14 |
| J | 7.11 | 1.12 |
| H | 7.13 | 1.14 |
| K | 7.14 | 1.15 |
Colour index B-V: +0.00
Derivations
- Heliocentric distance: 157.95 pc (515 light years) (0.4% margin of error)
- Absolute visual magnitude: 1.18
- Transverse velocity: 12.1 km/s
- Space velocity relative to the Sun: 24.8 km/s
- Galactic position (X, Y, Z): 48.3 pc, 81.4 pc, 126.4 pc
- Galactic velocity (U, V, W): -7.9 km/s, -21.0 km/s, -10.5 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.