56 Arietis
| Observation data Epoch J2000 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Aries |
| Right ascension | 03h 12m 14.24670s |
| Declination | +27° 15′ 25.0847″ |
| Apparent magnitude (V) | 5.79 |
| Characteristics | |
| Spectral type | B9pSi |
| U−B color index | –0.42 |
| B−V color index | –0.12 |
| Variable type | SX Ari |
| Astrometry | |
| Radial velocity (Rv) | +18.0 km/s |
| Proper motion (μ) |
RA: +12.39 mas/yr Dec.: –18.57 mas/yr |
| Parallax (π) | 6.49 ± 0.76mas |
| Distance | approx. 500 ly (approx. 150 pc) |
| Absolute magnitude (MV) | +0.25 |
| Details | |
| Mass | 3.16 ± 0.17 M☉ |
| Radius | 2.3 ± 0.3 R☉ |
| Luminosity | 110 L☉ |
| Surface gravity (log g) | 4.36 ± 0.12 cgs |
| Temperature | 12,445 K |
| Rotation | 0.7278972 days |
| Other designations | |
| Database references | |
| SIMBAD | data |
56 Arietis (abbreviated 56 Ari) is a star in the northern constellation of Aries. 56 Arietis is the Flamsteed designation. It is faintly visible to the naked eye with an apparent visual magnitude is 5.79. The estimated distance to this star is approximately 500 light-years (150 parsecs). This is a magnetic, chemically peculiar star of the silicon type and it has a rapid rotation period of 17.5 hours.
56 Arietis is also known by its variable star designation SX Arietis. 56 Arietis is the prototype of a class of variable stars known as SX Arietis variables, which are rotationally variable stars with strong magnetic fields.
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