Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 01h 07m 57.16387s[1] |
Declination | +20° 44′ 20.8310″[1] |
Apparent magnitude (V) | +5.56[2] |
Characteristics | |
Spectral type | A3 V[3] |
B−V color index | +0.12[2] |
Astrometry | |
Radial velocity (Rv) | −15.2±0.9[4] km/s |
Proper motion (μ) | RA: +86.72[1] mas/yr Dec.: −82.75[1] mas/yr |
Parallax (π) | 21.14 ± 0.77 mas[1] |
Distance | 154 ± 6 ly (47 ± 2 pc) |
Absolute magnitude (MV) | +2.19[5] |
Details | |
Mass | 1.82[6] M☉ |
Radius | 2.0[7] R☉ |
Luminosity | 13[3] L☉ |
Surface gravity (log g) | 4.36±0.14[6] cgs |
Temperature | 8,611±293[6] K |
Rotational velocity (v sin i) | 149[3] km/s |
Age | 250[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Psi2 Piscium (ψ2 Piscium) is a white-hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of +5.56.[2] Based upon an annual parallax shift of 8.66 mas as seen from Earth,[1] it is located about 380 light years from the Sun. It has a peculiar velocity of 14.6±2.9 km/s, indicating it is a runaway star.[9]
This is a suspected binary star system,[10] with a companion star at an angular separation of 0.357±0.002 arc seconds along a position angle of 174.99°±0.30° from the primary, as of 2008. This corresponds to a projected separation of 16.88±0.62 AU.[11] The brighter component is an A-type main sequence star with a stellar classification of A3 V.[3] The system is a source of X-ray emission with a luminosity of 143.9×1020 W, which is most likely originating from the cooler companion since A-type main sequence stars are not expected to be magnetically active.[12]
vanLeeuwen2007
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was invoked but never defined (see the help page).Eggleton2008
was invoked but never defined (see the help page).DeRosa2012
was invoked but never defined (see the help page).Schroeder2007
was invoked but never defined (see the help page).