Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 22h 48m 30.21043s [2] |
Declination | –10° 33′ 19.7143″ [2] |
Apparent magnitude (V) | 6.19 [3] |
Characteristics | |
Evolutionary stage | main sequencec |
Spectral type | F0 V [4] |
B−V color index | +0.28 [3] |
Variable type | δ Sct [5] |
Astrometry | |
Radial velocity (Rv) | –5.8 [6] km/s |
Proper motion (μ) |
RA: +31.535
[2]
mas/
yr Dec.: +7.915 [2] mas/ yr |
Parallax (π) | 7.6654 ± 0.0704 mas [2] |
Distance | 425 ± 4
ly (130 ± 1 pc) |
Absolute magnitude (MV) | +0.88 [7] |
Details | |
Radius | 4.17+0.17 −0.23 [2] R☉ |
Luminosity | 44.8±0.5 [2] L☉ |
Surface gravity (log g) | 3.48 [7] cgs |
Temperature | 7,314+187 −144 [2] K |
Metallicity [Fe/H] | 0.02±0.15 [8] dex |
Rotational velocity (v sin i) | 110 [9] km/s |
Other designations | |
Database references | |
SIMBAD | data |
70 Aquarii is a variable star located 425 [2] light years away from the Sun in the equatorial constellation of Aquarius. It has the variable star designation FM Aquarii; [7] 70 Aquarii is the Flamsteed designation. It is near the lower limit of visibility to the naked eye, appearing as a dim, yellow-white hued star with a baseline apparent visual magnitude of 6.19. [3] This star is moving closer to the Earth with a heliocentric radial velocity of –5.8 km/s. [6]
This is an F-type main-sequence star with a stellar classification of F0 V. [4] Located in the lower part of the instability strip, it is a Delta Scuti-type variable that ranges in brightness from magnitude 6.16 down to 6.19 with a period of 125 minutes (0.087 days). [5] The star has a high rate of spin, showing a projected rotational velocity of 110 km/s. [9] It has four [2] times the Sun's radius and is radiating 45 [2] times the luminosity of the Sun from its photosphere at an effective temperature of around 7,314 K. [2]