Omega1 Aquarii, Latinized from ω1 Aquarii, is the Bayer designation for a single[6] star in the equatorial constellation of Aquarius. With an apparent visual magnitude of 4.96,[2] this star is faintly visible to the naked eye from the suburbs. The distance to this star can be estimated from the parallax as approximately 138 light-years (42 parsecs).[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 23h 39m 47.06545s[1] |
Declination | –14° 13′ 19.7374″[1] |
Apparent magnitude (V) | 4.96[2] |
Characteristics | |
Spectral type | A7 IV[3] |
B−V color index | +0.25[2] |
Astrometry | |
Radial velocity (Rv) | –2[4] km/s |
Proper motion (μ) | RA: +54.147[1] mas/yr Dec.: −50.151[1] mas/yr |
Parallax (π) | 23.5523 ± 0.4848 mas[1] |
Distance | 138 ± 3 ly (42.5 ± 0.9 pc) |
Absolute magnitude (MV) | +1.78[5] |
Details | |
Mass | 1.95 M☉[6] 1.88±0.04[7] M☉ |
Radius | 2.44+0.11 −0.25[1] R☉ |
Luminosity | 14.8±0.3[1] L☉ |
Temperature | 7,249+399 −150 K |
Rotational velocity (v sin i) | 105[8] km/s |
Age | 790 Myr[6] 600[9] Myr |
Other designations | |
Database references | |
SIMBAD | data |
The stellar classification of this star is A7 IV,[3] matching a subgiant star. It is spinning rapidly with a projected rotational velocity of 105 km/s.[8] The star is about 600[9] million years old and is radiating 15[1] times the Sun's luminosity. It has 1.9[7] times the mass of the Sun and 2.4[1] times the Sun's radius.