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Omicron Piscium
Star in the constellation Pisces / From Wikipedia, the free encyclopedia
Omicron Piscium (ο Piscium, abbreviated Omi Psc, ο Psc) is a binary star in the constellation of Pisces. It is visible to the naked eye, having an apparent visual magnitude of 4.27.[2] Based upon an annual parallax shift of 11.67 mas as seen from the Earth,[1] the system is located roughly 280 light-years from the Sun. It is positioned near the ecliptic, so is subject to occultation by the Moon.[7] It is a member of the thin disk population of the Milky Way.[5]
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 01h 45m 23.63185s[1] |
Declination | +09° 09′ 27.8530″[1] |
Apparent magnitude (V) | 4.27[2] |
Characteristics | |
Evolutionary stage | Horizontal branch[3] |
Spectral type | K0 III[2] |
U−B color index | +0.736[4] |
B−V color index | +0.959[4] |
Astrometry | |
Proper motion (μ) | RA: +72.98[1] mas/yr Dec.: +39.30[1] mas/yr |
Parallax (π) | 11.67 ± 0.67 mas[1] |
Distance | 280 ± 20 ly (86 ± 5 pc) |
Absolute magnitude (MV) | −0.22[2] |
Details[5] | |
Mass | 3.03 M☉ |
Radius | 14.57 R☉ |
Luminosity | 132 L☉ |
Surface gravity (log g) | 2.57 cgs |
Temperature | 5,004 K |
Metallicity [Fe/H] | 0.10 dex |
Rotational velocity (v sin i) | 2.88 km/s |
Age | 390 Myr |
Other designations | |
Database references | |
SIMBAD | data |
Close
The two components are designated Omicron Piscium A (formally named Torcular /ˈtɔːrkjʊlər/)[8] and B.