Omicron Arietis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Aries[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | +5.78[3] |
| Characteristics | |
| Spectral type | B9 Vn[4] |
| U−B Template:Engvar | −0.21[5] |
| B−V Template:Engvar | −0.01[5] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[6] km/s |
| Proper motion (μ) | RA: +2.942 mas/yr[2] Dec.: −16.236 mas/yr[2] |
| Parallax (π) | 5.7867±0.1606 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.51[1] |
| Details | |
| Mass | 2.78±0.37[7] Template:Solar mass |
| Radius | 4.27±0.14[7] Template:Solar radius |
| Luminosity | 217±14[7] Template:Solar luminosity |
| Surface gravity (log g) | 3.62±0.07[7] cgs |
| Temperature | 10,715±186[7] K |
| Rotational velocity (v sin i) | 225[8] km/s |
| Age | 286[9] Myr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[10] | |
| Database references | |
| SIMBAD | data |
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Omicron Arietis is a single,[3] blue-white-hued star in the northern constellation of Aries. Its name is a Bayer designation that is Latinised from ο Arietis, and abbreviated Omicron Ari or ο Ari. This star has an apparent visual magnitude of +5.78,[3] which means it is dimly visible to the naked eye. Based upon an annual parallax shift of Script error: No such module "val". as seen from Earth,[2] it is located approximately 560 light-years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.22 due to interstellar dust.[9]
This is a B-type main-sequence star with a stellar classification of B9 Vn.[4] The 'n' suffix indicates that it has nebulous absorption lines in its spectrum, which are caused by the Doppler effect and rapid rotation. Indeed, it has a projected rotational velocity of 225 km/s.[8] The star has an estimated 2.8 times the mass of the Sun and about 4.3 times the Sun's radius. It is radiating energy from its photosphere at 217 times the Sun's luminosity with an effective temperature of Script error: No such module "val"..[7]
References
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- ↑ a b Template:Cite XHIP
- ↑ a b c d e Template:Cite Gaia DR3
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- ↑ a b c d e f Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Template:Cite simbad
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