Location of 66 Aquarii (circled) | |
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Aquarius |
Right ascension | 22h43m 35.23307s[1] |
Declination | –18° 49′ 49.3557″[1] |
Apparent magnitude (V) | 4.673[2] |
Characteristics | |
Spectral type | K3 III[3] |
U−B color index | +1.549[2] |
B−V color index | +1.376[2] |
Variable type | suspected[4] |
Astrometry | |
Radial velocity (Rv) | +21.6[5] km/s |
Proper motion (μ) | RA: –31.73[1] mas/yr Dec.: –28.54[1] mas/yr |
Parallax (π) | 7.53 ± 0.26 mas[1] |
Distance | 430 ± 10 ly (133 ± 5 pc) |
Absolute magnitude (MV) | −0.93[6] |
Details | |
Radius | 37[7] R☉ |
Luminosity | 434.08[6] L☉ |
Surface gravity (log g) | 2.06[8] cgs |
Temperature | 4,170[8] K |
Metallicity [Fe/H] | –0.23[8] dex |
Rotational velocity (v sin i) | 10[9] km/s |
Other designations | |
66 Aqr, BD−19° 6324, HD 215167, HIP 112211, HR 8649, SAO 165252[10] | |
Database references | |
SIMBAD | data |
66 Aquarii is a single[11] star in the equatorial constellationofAquarius. 66 Aquarii is the Flamsteed designation though the star also bears the Bayer designationofg1 Aquarii.[12] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.673.[2] Based upon an annual parallax shift of 7.53 milliarcseconds,[1] the distance to this star is about 430 light-years (130 parsecs).
This is an evolved giant star with a stellar classification of K3 III.[3] It has expanded to 37 times the radius of the Sun[7] and is radiating 434[6] times the luminosity of the Sun from its outer envelope at an effective temperature of 4,170 K.[8] This gives it the orange-hued glow of a K-type star.[13] It is a suspected variable star that ranges in magnitude between 4.66 and 4.71.[4]
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