R Sculptoris, a carbon bright giant star in Sculptor

R Sculptoris (HIP 6759)

R Sculptoris is a carbon bright giant star in the constellation Sculptor. At 828 light years away, it shines at an apparent visual magnitude of 6.57. R Sculptoris is the primary component of a multiple-star system and an intrinsic variable star that varies between magntitudes 5.96 and 7.24 over a period of 372 days. It is moving through the Galaxy at a speed of 39.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 18,200 and 28,700 light years from the center of the Galaxy.

Sky position: RA 1h 27.0m, Dec -32° 32.4'

Common designations: R Sculptoris, HIP 6759, HD 8879

Galactic Orbit of R Sculptoris
(compared to the Sun)

E

ccentricity: 22.4% vs. 16.0%

Angle φ : 110.9°vs. 26.0°

Semi-major axis : 7,187 pc vs. 8,686 pc

Semi-minor axis: 7,004 pc vs. 8,574 pc

Focus-to-center

: 1,613 pcvs. 1,388 pc

Semilatus rectum : 6,826 pc vs. 8,464 pc

Perigalacticon: 5,575 pc vs. 7,297 pc

Apogalacticon

: 8,800 pcvs. 10,074 pc
  Some Tabulated XHIP Data for R Sculptoris
(see also: SIMBAD)

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

Position	Proper Motion
Right Ascension:	21.74208418° ±0.51 mas	-7.63 ±0.69 mas/yr.
Declination:	-32.54310053° ±0.45 mas	-31.48 ±0.46 mas/yr.
Galactic Longitude:	250.18077326°	30.59 mas/yr.
Galactic Latitude:	-80.58860308°	10.65 mas/yr.

Parallax: 3.76 ± 0.75 mas

Spectrography

Spectral Type: C6 II 1971ApJ...167..521R.

Radial Velocity: -5.40 ±2.20 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a

Photometry
 

band	magnitude	Abs. Mag.
U
B	9.02	2.00
V	6.57	-0.45
R
I	3.91	-3.11
J
H
K

B-V: +2.45 V-I: +2.66

Derivations

Heliocentric distance: 253.84 pc (19.9% margin of error)

Galactocentric distance: 7,418 pc

Transverse velocity: 39.0 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	-14.1 pc	-39.0 pc	-250.4 pc
Velocity (U, V, W)	30.6 km/s	-23.5 km/s	7.4 km/s