56 Ursae Majoris (56 UMa) is a star in the constellation Ursa Major. Its apparent magnitude is 5.03.[2] It is a single-lined spectroscopic binary with an orbital period of about 45 years.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 11h 22m 49.58373s[1] |
| Declination | +43° 28′ 57.7267″[1] |
| Apparent magnitude (V) | 5.03[2] |
| Characteristics | |
| Spectral type | G7IIIBa0.3[3] |
| U−B color index | +0.82[4] |
| B−V color index | +1.02[4] |
| Astrometry | |
| Radial velocity (Rv) | 1.01 ± 0.05[5] km/s |
| Proper motion (μ) | RA: -37.42[1] mas/yr Dec.: -14.26[1] mas/yr |
| Parallax (π) | 6.12 ± 0.27 mas[1] |
| Distance | 530 ± 20 ly (163 ± 7 pc) |
| Orbit[5] | |
| Period (P) | 16,460 ± 631 d |
| Eccentricity (e) | 0.555 ± 0.016 |
| Periastron epoch (T) | 2,451,521 ± 35 |
| Argument of periastron (ω) (secondary) | 286.8 ± 2.0° |
| Semi-amplitude (K1) (primary) | 3.84 ± 0.04 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Constellation of Ursa Major | |||||||||||||
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