Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 23h 16m 50.93916s [1] |
Declination | −07° 43′ 35.4023″ [1] |
Apparent magnitude (V) | 4.75 - 5.10 [2] |
Characteristics | |
Spectral type | M3 III [3] |
U−B color index | +1.60 [4] |
B−V color index | +1.60 [4] |
Variable type | SRb? [2] |
Astrometry | |
Radial velocity (Rv) | −13.72 ± 0.86 [5] km/s |
Proper motion (μ) |
RA: −19.18
[1]
mas/
yr Dec.: −14.10 [1] mas/ yr |
Parallax (π) | 5.32 ± 0.37 mas [1] |
Distance | 610 ± 40
ly (190 ± 10 pc) |
Absolute magnitude (MV) | −1.43 [6] |
Details | |
Radius | 142 [7] R☉ |
Luminosity | 2,598 [7] L☉ |
Surface gravity (log g) | 0.128 [7] cgs |
Temperature | 3,456 [7] K |
Other designations | |
Database references | |
SIMBAD | data |
Chi Aquarii, Latinized from χ Aquarii, is the Bayer designation of a star in the equatorial constellation of Aquarius. The distance to this star, based upon parallax measurements with a 7% margin of error, is roughly 610 light-years (190 parsecs). It is visible to the naked eye with an apparent visual magnitude of about 5.
This is a red giant star with a spectral classification of M3 III. [3] The interferometry-measured angular diameter of this star is 6.70 ± 0.15 mas, [10] which, at its estimated distance, equates to a physical radius of about 137 times the radius of the Sun. [a] It is classified as a semi-regular variable star and its brightness varies by an amplitude of 0.0636 in magnitude. [11] The identified pulsation periods are 32.3, 38.5, and 44.9 days. [12]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 23h 16m 50.93916s [1] |
Declination | −07° 43′ 35.4023″ [1] |
Apparent magnitude (V) | 4.75 - 5.10 [2] |
Characteristics | |
Spectral type | M3 III [3] |
U−B color index | +1.60 [4] |
B−V color index | +1.60 [4] |
Variable type | SRb? [2] |
Astrometry | |
Radial velocity (Rv) | −13.72 ± 0.86 [5] km/s |
Proper motion (μ) |
RA: −19.18
[1]
mas/
yr Dec.: −14.10 [1] mas/ yr |
Parallax (π) | 5.32 ± 0.37 mas [1] |
Distance | 610 ± 40
ly (190 ± 10 pc) |
Absolute magnitude (MV) | −1.43 [6] |
Details | |
Radius | 142 [7] R☉ |
Luminosity | 2,598 [7] L☉ |
Surface gravity (log g) | 0.128 [7] cgs |
Temperature | 3,456 [7] K |
Other designations | |
Database references | |
SIMBAD | data |
Chi Aquarii, Latinized from χ Aquarii, is the Bayer designation of a star in the equatorial constellation of Aquarius. The distance to this star, based upon parallax measurements with a 7% margin of error, is roughly 610 light-years (190 parsecs). It is visible to the naked eye with an apparent visual magnitude of about 5.
This is a red giant star with a spectral classification of M3 III. [3] The interferometry-measured angular diameter of this star is 6.70 ± 0.15 mas, [10] which, at its estimated distance, equates to a physical radius of about 137 times the radius of the Sun. [a] It is classified as a semi-regular variable star and its brightness varies by an amplitude of 0.0636 in magnitude. [11] The identified pulsation periods are 32.3, 38.5, and 44.9 days. [12]