HD 73799, an orange star in Cancer
HD 73799 is an orange star in the constellation Cancer. At 946 light years away, it shines at an apparent visual magnitude of 6.76.
HD 73799 (HIP 42560)
HD 73799 is an orange star in the constellation Cancer. At 946 light years away, it shines at an apparent visual magnitude of 6.76. It is moving through the Galaxy at a speed of 17.5 km/s relative to the Sun.
Sky position: RA 8h 40.5m, Dec +10° 55.4'
Common designations: HD 73799, HIP 42560, Gaia DR3 601479387775410176
HD 73799 has the spectral type K0. K-type stars are orange stars with surface temperatures of about 3,900 to 5,300 K. Their spectra are rich in neutral metal lines and, in the cooler examples, molecular bands.
How to find HD 73799 in the sky
HD 73799 lies in Cancer. With a declination of +10° 55.4', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 79° S. It is just beyond naked-eye visibility; binoculars will show it easily. It is highest in the sky at local midnight around February, which makes the weeks around that month the best time to observe it.
Tabulated data for HD 73799
Astrometry and spectroscopy
| Right Ascension (J2000) | 130.13561304° (8h 40.5m) |
| Declination (J2000) | 10.92412019° (+10° 55.4') |
| Galactic Longitude | 215.32823181° |
| Galactic Latitude | 29.13606323° |
| Proper motion RA | -5.71 mas/yr |
| Proper motion Dec | -5.47 mas/yr |
| Parallax | 3.45 ± 0.06 mas |
| Spectral Type | K0 |
| Radial Velocity | 13.76 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 8.14 | 0.83 |
| V | 6.76 | -0.55 |
| J | 4.58 | -2.73 |
| H | 3.76 | -3.55 |
| K | 3.61 | -3.70 |
Colour index B-V: +1.38
Derivations
- Heliocentric distance: 289.96 pc (946 light years) (1.7% margin of error)
- Absolute visual magnitude: -0.55
- Transverse velocity: 10.9 km/s
- Space velocity relative to the Sun: 17.5 km/s
- Galactic position (X, Y, Z): -206.6 pc, -146.5 pc, 141.2 pc
- Galactic velocity (U, V, W): -11.9 km/s, -12.7 km/s, -2.3 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.