| 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−Vcolor 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 | |
| 70 Aqr,BD−11°5923,FK5 3825,HD 215874,HIP 112615,HR 8676,SAO 165308[10] | |
| Database references | |
| SIMBAD | data |
70 Aquarii is avariable star located 425[2] light years away from the Sun in theequatorialconstellation ofAquarius. It has thevariable star designationFM Aquarii;[7]70 Aquarii is theFlamsteed designation. It is near the lower limit of visibility to the naked eye, appearing as a dim, yellow-white hued star with a baselineapparent visual magnitude of 6.19.[3] This star is moving closer to the Earth with a heliocentricradial velocity of –5.8 km/s.[6]
Werner Wolfgang Weiss discovered that 70 Aquarii was a variable star in 1977.[1] It was given its variable star designation in 1981.[11]
This is anF-type main-sequence star with astellar classification of F0 V.[4] Located in the lower part of theinstability strip, it is aDelta 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 aprojected rotational velocity of 110 km/s.[9] It has four[2] times theSun's radius and is radiating 45[2] times theluminosity of the Sun from itsphotosphere at aneffective temperature of around 7,314 K.[2]
