11 Aquarii
Star in the constellation Aquarius
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11 Aquarii is a sun-like star in the zodiac constellation of Aquarius, 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 â17.8 km/s,[2] and is expected to come as close as 65.1 ly in 700,000 years.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 00m 33.84082s[1] |
| Declination | â04° 43â² 48.9421â³[1] |
| Apparent magnitude (V) | 6.216[2] |
| Characteristics | |
| Spectral type | G1 V[3] |
| UâB color index | +0.22[4] |
| BâV color index | +0.63[4] |
| Astrometry | |
| Radial velocity (Rv) | â17.8±2[2] km/s |
| Proper motion (μ) | RA: 48.856 mas/yr Dec.: â137.781 mas/yr |
| Parallax (Ï) | 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 | 1.20±0.01[5] Mâ |
| Radius | 1.30[6] Râ |
| Luminosity | 2.24[7] Lâ |
| Surface gravity (log g) | 4.32±0.02[5] cgs |
| Temperature | 5,967±7[5] K |
| Metallicity [Fe/H] | +0.273±0.006[5] dex |
| Rotational velocity (v sin i) | 5[8] km/s |
| Age | 3.70+0.09 â0.14[5] Gyr |
| Other designations | |
| 11 Aqr, BDâ05°5433, HD 199960, HIP 103682, HR 8041, SAO 145022[9] | |
| Database references | |
| SIMBAD | data |
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 3.7 billion years old, it has 1.20 times the mass[5] and 1.30 times the radius of the Sun.[2][6] It is radiating 2.24 times the luminosity of the Sun from its photosphere[7] at an effective temperature of 5,944 K.[5]