53 Arietis
Star in the constellation Aries / From Wikipedia, the free encyclopedia
53 Arietis (abbreviated 53 Ari) is a variable star in the northern constellation of Aries. 53 Arietis is the Flamsteed designation; it also bears the variable star designation UW Arietis. It is a B-type main sequence star with a stellar classification of B1.5 V[3] and mean apparent magnitude of 6.10,[2] which is near the lower limit for naked eye visibility. Based upon an annual parallax shift of 3.2 mas, the estimated distance to this star is roughly 1,020 light-years (314 parsecs).
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aries |
Right ascension | 03h 07m 25.67315s[1] |
Declination | +17° 52′ 47.9696″[1] |
Apparent magnitude (V) | 6.10[2] |
Characteristics | |
Spectral type | B1.5 V[3] |
U−B color index | [4] 0.80[2] |
B−V color index | −0.12[2] |
Variable type | β Cep[4] |
Astrometry | |
Radial velocity (Rv) | +21.2[5] km/s |
Proper motion (μ) | RA: −23.733[1] mas/yr Dec.: +8.080[1] mas/yr |
Parallax (π) | 3.1874 ± 0.0630 mas[1] |
Distance | 1,020 ± 20 ly (314 ± 6 pc) |
Details | |
Mass | 7.5±0.2[6] M☉ |
Radius | 4.2[1] R☉ |
Luminosity | 1,962[1] L☉ |
Surface gravity (log g) | 3.99[1] cgs |
Temperature | 19,065[1] K |
Metallicity [Fe/H] | −0.18[1] dex |
Rotational velocity (v sin i) | 5[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
53 Arietis is a Beta Cephei variable.[4] It is a runaway star with a peculiar velocity of 48.1 km/s relative to its neighbors.[6] The star was ejected from the Orion nebula some 4–5 million years ago, possibly when an orbiting companion exploded as a supernova.[9]