  | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Crater |
| HD 99922 A | |
| Right ascension | 11h 29m 38.619s |
| Declination | −24° 27′ 50.48″ |
| Apparent magnitude (V) | 5.813 |
| HD 99922 B | |
| Right ascension | 11h 29m 39.219s |
| Declination | −24° 27′ 49.40″ |
| Apparent magnitude (V) | 8.543 |
| Characteristics | |
| HD 99922 A | |
| Evolutionary stage | main sequence |
| Spectral type | A0V |
| B−V color index | +0.07 |
| HD 99922 B | |
| Evolutionary stage | main sequence |
| Spectral type | F1V |
| Astrometry | |
| HD 99922 A | |
| Radial velocity (Rv) | −2.50 km/s |
| Proper motion (μ) | RA: −44.450 mas/yr Dec.: +15.779 mas/yr |
| Parallax (π) | 8.6451±0.0395 mas |
| Distance | 377 ± 2 ly (115.7 ± 0.5 pc) |
| HD 99922 B | |
| Proper motion (μ) | RA: −50.386 mas/yr Dec.: +19.267 mas/yr |
| Parallax (π) | 9.2333±0.0678 mas |
| Distance | 353 ± 3 ly (108.3 ± 0.8 pc) |
| Details | |
| HD 99922 A | |
| Mass | 2.2 M☉ |
| Radius | 3.2 R☉ |
| Luminosity | 55 L☉ |
| Surface gravity (log g) | 4.05 cgs |
| Temperature | 10,186 K |
| Metallicity [Fe/H] | +0.25 dex |
| Rotation | 1.39 days |
| Rotational velocity (v sin i) | 65 km/s |
| Age | 510 Myr |
| HD 99922 B | |
| Mass | 1.3 M☉ |
| Radius | 1.4 R☉ |
| Surface gravity (log g) | 4.23 cgs |
| Temperature | 6,449 K |
| Age | 4.7 Gyr |
| Other designations | |
| CD−23°10009, HD 99922, HR 4428, ADS 8183 AB | |
| HD 99922 A: HIP 56078, SAO 179935 | |
| HD 99922 B: SAO 179936 | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
HD 99922 is a double star system in the constellation of Crater. It shines with an apparent visual magnitude of 5.77 from a distance of about 377 light years (116 parsecs) away from the Earth. The primary star is an A-type main sequence star; the secondary star is located about 8 arcseconds away. Given the discrepant parallaxes of the two stars, they are unlikely to be physically associated.
Other designations for the primary component include HR 4428 and HIP 56078.
