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Binary star in the constellation Aquarius From Wikipedia, the free encyclopedia
Psi3 Aquarii, Latinized from ψ3 Aquarii, is the Bayer designation for a visual binary star[9] system in the constellation of Aquarius. It has an apparent visual magnitude of 4.98,[2] which is bright enough to be seen with the naked eye. Parallax measurements give a distance estimate of roughly 262 light-years (80 parsecs).[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 23h 18m 57.67658s[1] |
Declination | –09° 36′ 38.7054″[1] |
Apparent magnitude (V) | 4.98[2] |
Characteristics | |
Spectral type | A0 V[3] |
U−B color index | –0.02 |
B−V color index | –0.02[2] |
Astrometry | |
Radial velocity (Rv) | –10[4] km/s |
Proper motion (μ) | RA: +43.33[1] mas/yr Dec.: –8.30[1] mas/yr |
Parallax (π) | 12.47 ± 0.43 mas[1] |
Distance | 262 ± 9 ly (80 ± 3 pc) |
Absolute magnitude (MV) | +0.47[5] |
Details | |
Radius | 2[6] R☉ |
Luminosity | 70[5] L☉ |
Rotational velocity (v sin i) | 144[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
The main component of this system is an A-type main sequence star with a stellar classification of A0 V.[3] Its companion is an 11th magnitude star 1.5 arcseconds from the primary.[10] This system is an X-ray source with a luminosity of 8.34 × 1029 erg s−1. This radiation most likely comes from the companion star.[9]