16 Aquarii, a yellow giant star in Aquarius
16 Aquarii is a yellow giant star in the constellation Aquarius. At 296 light years away, it shines at an apparent visual magnitude of 5.87.
16 Aquarii (HIP 105412)
16 Aquarii is a yellow giant star in the constellation Aquarius. At 296 light years away, it shines at an apparent visual magnitude of 5.87. The iron abundance of 16 Aquarii is +0.01 (102.3% of the Sun). It is moving through the Galaxy at a speed of 8.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,800 and 32,400 light years from the center of the Galaxy. It will come closest to the Sun 6.8 million years from now when it will brighten to magnitude 5.21 from a distance of 218 light years.
Sky position: RA 21h 21.1m, Dec -4° 33.6'
Common designations: 16 Aquarii, HIP 105412, HD 203222, HR 8160
Galactic Orbit of
16 Aquarii
(compared to the
Sun)
E
ccentricity: 15.3% vs. 16.0%Angle φ : 19.0°vs. 26.0°
Semi-major axis : 8,615 pc vs. 8,686 pc
Semi-minor axis: 8,514 pc vs. 8,574 pc
Focus-to-center
: 1,318 pcvs. 1,388 pcSemilatus rectum : 8,414 pc vs. 8,464 pc
Perigalacticon: 7,297 pc vs. 7,297 pc
Apogalacticon
: 9,934 pcvs. 10,074 pcSome Tabulated XHIP Data for 16 Aquarii
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 320.26802439° ±0.37 mas | -10.21 ±0.40 mas/yr. |
| Declination: | -4.56015199° ±0.23 mas | 11.25 ±0.22 mas/yr. |
| Galactic Longitude: | 47.47231486° | 4.58 mas/yr. |
| Galactic Latitude: | -35.11395275° | 14.49 mas/yr. |
Parallax: 11.00 ± 0.35 mas
Spectrography
Spectral Type: G8 III 1999MSS...C05....0H.
Radial Velocity: -6.00 ±2.90 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
0.01 ±0.06 dex
2007A&A...475.1003H.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 6.78 | 1.99 |
| V | 5.87 | 1.08 |
| R | ||
| I | 5.05 | 0.26 |
| J | 4.58 | -0.22 |
| H | 3.92 | -0.87 |
| K | 3.92 | -0.87 |
B-V: +0.91 V-I: +0.82
Derivations
Heliocentric distance: 90.80 pc (3.2% margin of error)
Galactocentric distance: 7,350 pc
Transverse velocity: 6.5 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 50.2 pc | 54.7 pc | -52.2 pc |
| Velocity (U, V, W) | -2.3 km/s | 0.4 km/s | 8.6 km/s |