17 Aquarii, an orange giant star in Aquarius

17 Aquarii (HIP 105574)

17 Aquarii is an orange giant star in the constellation Aquarius. At 720 light years away, it shines at an apparent visual magnitude of 5.99. The iron abundance of 17 Aquarii is -0.1 (79.4% of the Sun). It is moving through the Galaxy at a speed of 44.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,300 and 32,700 light years from the center of the Galaxy.

Sky position: RA 21h 22.9m, Dec -9° 19.2'

Common designations: 17 Aquarii, HIP 105574, HD 203525, HR 8175

Galactic Orbit of 17 Aquarii
(compared to the Sun)

E

ccentricity: 25.7% vs. 16.0%

Angle φ : 84.6°vs. 26.0°

Semi-major axis : 7,975 pc vs. 8,686 pc

Semi-minor axis: 7,708 pc vs. 8,574 pc

Focus-to-center

: 2,046 pcvs. 1,388 pc

Semilatus rectum : 7,449 pc vs. 8,464 pc

Perigalacticon: 5,928 pc vs. 7,297 pc

Apogalacticon

: 10,021 pcvs. 10,074 pc
  Some Tabulated XHIP Data for 17 Aquarii
(see also: SIMBAD)

Astrometry
2007A&A...474..653V

Position	Proper Motion
Right Ascension:	320.73446404° ±0.40 mas	-28.40 ±0.80 mas/yr.
Declination:	-9.31927318° ±0.27 mas	-25.60 ±0.80 mas/yr.
Galactic Longitude:	42.55940154°	-35.76 mas/yr.
Galactic Latitude:	-37.80878177°	13.54 mas/yr.

Parallax: 4.46 ± 0.51 mas

Spectrography

Spectral Type: K4/5 III 1999MSS...C05....0H.

Radial Velocity: 19.73 ±1.70 km/s [A rating] 2009A&A...498..627F.
This star is a spectroscopic binary with a solved orbit.

Iron Abundance [Fe/H]: -0.10 ±0.04 dex  2011A&A...525A..71W.
 

Photometry
 

band	magnitude	Abs. Mag.
U
B	7.51	0.79
V	5.99	-0.73
R
I	4.61	-2.11
J	2.84	-3.88
H	2.08	-4.64
K	1.85	-4.87

B-V: +1.52 V-I: +1.38

Derivations

Heliocentric distance: 220.75 pc (11.4% margin of error)

Galactocentric distance: 7,274 pc

Transverse velocity: 40.0 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	128.5 pc	118.0 pc	-135.3 pc
Velocity (U, V, W)	43.2 km/s	-11.1 km/s	-0.9 km/s