| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h00m 33.84082s[1] |
| Declination | –04° 43′ 48.9421″[1] |
| Apparent magnitude (V) | 6.216[2] |
| Characteristics | |
| Spectral type | G1 V[3] |
| U−B color index | +0.22[4] |
| B−V color index | +0.63[4] |
| Astrometry | |
| Radial velocity (Rv) | −17.8±2[2] km/s |
| Proper motion (μ) | RA: 48.856 mas/yr Dec.: –137.781 mas/yr |
| Parallax (π) | 36.8541 ± 0.0570 mas[1] |
| Distance | 88.5 ± 0.1 ly (27.13 ± 0.04 pc) |
| Absolute magnitude (MV) | 4.10[2] |
| Details | |
| Mass | 1.12+0.03 −0.09[2] M☉ |
| Radius | 1.30[5] R☉ |
| Luminosity | 2.24[6] L☉ |
| Surface gravity (log g) | 4.39[7] cgs |
| Temperature | 5,973[7] K |
| Metallicity [Fe/H] | 0.11[2]–0.28[7] dex |
| Rotational velocity (v sin i) | 5[8] km/s |
| Age | 4.7[2] Gyr |
| Other designations | |
10 Aqr, BD−05°5433, HD 199960, HIP 103682, HR 8041, SAO 145022[9] | |
| Database references | |
| SIMBAD | data |
11 Aquarii is a sun-like star in the zodiac constellationofAquarius, located 88.5 light years away from the Sun. 11 Aquarii is the Flamsteed designation. It is difficult to see with the naked eye, appearing as a dim, yellow-hued star with an apparent visual magnitude of 6.22.[2] This body is moving closer to the Earth with a heliocentric radial velocity of −17.8 km/s,[2] and is expected to come as close as 65.1 ly in 700,000 years.[6]
It is a G-type main-sequence star with a stellar classification of G1 V.[3] Compared to the Sun, this star has a higher abundance of elements more massive than helium. This indicates it belongs to a class of stars called metal-rich. The star is slightly older than the Sun, but it has slightly more mass and has a larger radius.[2][5] It is radiating 2.24[6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,973 K.[7]
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