70 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 48m 30.21043s |
| Declination | –10° 33′ 19.7143″ |
| Apparent magnitude (V) | 6.19 |
| Characteristics | |
| Evolutionary stage | main sequencec |
| Spectral type | F0 V |
| B−V color index | +0.28 |
| Variable type | δ Sct |
| Astrometry | |
| Radial velocity (Rv) | –5.8 km/s |
| Proper motion (μ) | RA: +31.535 mas/yr Dec.: +7.915 mas/yr |
| Parallax (π) | 7.6654±0.0704 mas |
| Distance | 425 ± 4 ly (130 ± 1 pc) |
| Absolute magnitude (MV) | +0.88 |
| Details | |
| Radius | 4.17+0.17 −0.23 R☉ |
| Luminosity | 44.8±0.5 L☉ |
| Surface gravity (log g) | 3.48 cgs |
| Temperature | 7,314+187 −144 K |
| Metallicity [Fe/H] | 0.02±0.15 dex |
| Rotational velocity (v sin i) | 110 km/s |
| Other designations | |
| 70 Aqr, BD−11°5923, FK5 3825, HD 215874, HIP 112615, HR 8676, SAO 165308 | |
| Database references | |
| SIMBAD | data |
70 Aquarii is a variable star located 425 light years away from the Sun in the equatorial constellation of Aquarius. It has the variable star designation FM Aquarii; 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. This star is moving closer to the Earth with a heliocentric radial velocity of –5.8 km/s.
Werner Wolfgang Weiss discovered that 70 Aquarii was a variable star in 1977. It was given its variable star designation in 1981.
This is an F-type main-sequence star with a stellar classification of F0 V. 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). The star has a high rate of spin, showing a projected rotational velocity of 110 km/s. It has four times the Sun's radius and is radiating 45 times the luminosity of the Sun from its photosphere at an effective temperature of around 7,314 K.