HR 6578, a red giant star in Ophiuchus

HR 6578 (HIP 86476)

HR 6578 is a red giant star in the constellation Ophiuchus. At 509 light years away, it shines at an apparent visual magnitude of 6.08. It is moving through the Galaxy at a speed of 49.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 17,600 and 25,100 light years from the center of the Galaxy. It will come closest to the Sun 3.0 million years from now when it will brighten to magnitude 2.33 from a distance of 90 light years.

Sky position: RA 17h 40.2m, Dec -2° 9'

Common designations: HIP 86476, HD 160471, HR 6578

Moon Calendar Cards

6" x 11" Postcards
Galactic Orbit of HR 6578
(compared to the Sun)

E

ccentricity: 17.7% vs. 16.0%

Angle φ : -136.0°vs. 26.0°

Semi-major axis : 6,542 pc vs. 8,686 pc

Semi-minor axis: 6,439 pc vs. 8,574 pc

Focus-to-center

: 1,157 pcvs. 1,388 pc

Semilatus rectum : 6,337 pc vs. 8,464 pc

Perigalacticon: 5,385 pc vs. 7,297 pc

Apogalacticon

: 7,699 pcvs. 10,074 pc
  Some Tabulated XHIP Data for HR 6578
(see also: SIMBAD)

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

Position	Proper Motion
Right Ascension:	265.04977723° ±0.44 mas	-5.10 ±1.00 mas/yr.
Declination:	-2.15227643° ±0.31 mas	-10.80 ±1.00 mas/yr.
Galactic Longitude:	22.63825159°	-11.92 mas/yr.
Galactic Latitude:	14.76718320°	-0.73 mas/yr.

Parallax: 6.36 ± 0.48 mas

Spectrography

Spectral Type: M2 III 1999MSS...C05....0H.

Radial Velocity: -49.00 ±4.30 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a

Photometry
 

band	magnitude	Abs. Mag.
U
B	7.69	1.72
V	6.08	0.11
R
I	4.74	-1.23
J	2.29	-3.68
H	1.50	-4.47
K	1.28	-4.69

B-V: +1.61 V-I: +1.34

Derivations

Heliocentric distance: 156.17 pc (7.5% margin of error)

Galactocentric distance: 7,261 pc

Transverse velocity: 8.8 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	139.4 pc	58.1 pc	39.8 pc
Velocity (U, V, W)	-40.2 km/s	-26.3 km/s	-13.0 km/s