Ruchbah, a white subgiant star in Cassiopeia
Ruchbah is a white subgiant star in the constellation Cassiopeia. At 99 light years away, it is the 109th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.66.
Ruchbah (HIP 6686)
Ruchbah is a white subgiant star in the constellation Cassiopeia. At 99 light years away, it is the 109th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.66. Ruchbah is the primary component of a multiple-star system. It is moving through the Galaxy at a speed of 43.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,100 and 26,200 light years from the center of the Galaxy.
Sky position: RA 1h 25.8m, Dec +60° 14.4'
Common designations: Ruchbah, Delta Cassiopeiae, 37 Cassiopeiae, HIP 6686, HD 8538, Gliese 58.1
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Brightest stars in Cassiopeia:
(list all)
| Rank | Mag. | Star |
| 1 | 2.15 | Gamma Cassiopeiae |
| 2 | 2.24 | Schedar |
| 3 | 2.28 | Caph |
4
| 2.66
) Ruchbah
| Rank | Mag. | Star |
| 5 | 3.35 | Segin |
| 6 | 3.46 | Eta Cassiopeia |
| 7 | 3.69 | Zeta Cassiopeiae |
| 8 | 3.95 | 50 Cassiopeiae |
| 9 | 4.17 | Kappa Cassiopeiae |
| 10 | 4.34 | Marfak |
| 11 | 4.46 | Iota Cassiopeiae |
| 12 | 4.48 | Omicron Cassiopeiae |
| 13 | 4.49 | A Cassiopeiae |
| 14 | 4.51 | Rho Cassiopeiae |
| 15 | 4.62 | Upsilon-2 Cassiopeiae |
| 16 | 4.68 | Chi Cassiopeiae |
| 17 | 4.72 | Psi Cassiopeiae |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Ruchbah
(compared to the Sun)
E
ccentricity: 13.1% vs. 16.0%Angle φ : -116.4°vs. 26.0°
Semi-major axis : 7,108 pc vs. 8,686 pc
Semi-minor axis: 7,046 pc vs. 8,574 pc
Focus-to-center
: 933 pcvs. 1,388 pcSemilatus rectum : 6,985 pc vs. 8,464 pc
Perigalacticon: 6,175 pc vs. 7,297 pc
Apogalacticon
: 8,041 pcvs. 10,074 pcSome Tabulated XHIP Data for Ruchbah
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 21.45251246° ±0.08 mas | 296.57 ±0.11 mas/yr. |
| Declination: | 60.23540367° ±0.08 mas | -49.22 ±0.08 mas/yr. |
| Galactic Longitude: | 127.18935057° | 300.48 mas/yr. |
| Galactic Latitude: | -2.35190870° | -9.31 mas/yr. |
Parallax: 32.81 ± 0.14 mas
Spectrography
Spectral Type: A5IV 1989ApJS...70..623G.
Radial Velocity: 6.70 ±1.78 km/s [B rating] 2007AN....328..889K.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
2.82
0.40
V
2.66
0.24
R
2.60
0.18
I
2.50
0.08
J
2.34
-0.08
H
2.37
-0.05
K
2.25
-0.17
B-V: +0.16 V-I: +0.16
Derivations
Heliocentric distance: 30.48 pc (0.4% margin of error)
Galactocentric distance: 7,418 pc
Transverse velocity: 43.4 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -18.4 pc | 24.3 pc | -1.3 pc |
| Velocity (U, V, W) | -38.6 km/s | -21.0 km/s | -1.6 km/s |