HD 210845, a yellow subgiant star in Aquarius

HD 210845 (HIP 109720)

HD 210845 is a yellow subgiant star in the constellation Aquarius. At 986 light years away, it shines at an apparent visual magnitude of 6.93. The iron abundance of HD 210845 is -0.14 (72.4% of the Sun). It is moving through the Galaxy at a speed of 41.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 17,000 and 23,700 light years from the center of the Galaxy.

Sky position: RA 22h 13.4m, Dec -11° 55.8'

Common designations: HIP 109720, HD 210845

Galactic Orbit of HD 210845
(compared to the Sun)

E

ccentricity: 16.5% vs. 16.0%

Angle φ : -173.5°vs. 26.0°

Semi-major axis : 6,250 pc vs. 8,686 pc

Semi-minor axis: 6,164 pc vs. 8,574 pc

Focus-to-center

: 1,033 pcvs. 1,388 pc

Semilatus rectum : 6,079 pc vs. 8,464 pc

Perigalacticon: 5,217 pc vs. 7,297 pc

Apogalacticon

: 7,283 pcvs. 10,074 pc
  Some Tabulated XHIP Data for HD 210845
(see also: SIMBAD)

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

Position	Proper Motion
Right Ascension:	333.35986554° ±0.47 mas	20.96 ±0.41 mas/yr.
Declination:	-11.92607292° ±0.36 mas	-20.11 ±0.32 mas/yr.
Galactic Longitude:	47.37936180°	-7.79 mas/yr.
Galactic Latitude:	-50.00905591°	-27.98 mas/yr.

Parallax: 3.20 ± 0.53 mas

Spectrography

Spectral Type: G5 IV 1988MSS...C04....0H.

Radial Velocity: -2.90 ±0.30 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: -0.14 ±0.08 dex  2011A&A...530A.138C.
 

Photometry
 

band	magnitude	Abs. Mag.
U
B	7.69	0.29
V	6.93	-0.47
R
I	6.22	-1.18
J	5.51	-1.89
H	5.19	-2.21
K	5.01	-2.39

B-V: +0.76 V-I: +0.71

Derivations

Heliocentric distance: 302.54 pc (16.6% margin of error)

Galactocentric distance: 7,273 pc

Transverse velocity: 41.7 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	131.7 pc	143.1 pc	-231.8 pc
Velocity (U, V, W)	-13.9 km/s	-31.6 km/s	-23.6 km/s