Schedar, an orange giant star in Cassiopeia
Schedar is an orange giant star in the constellation Cassiopeia. At 228 light years away, it is the 72nd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.24.
Schedar (HIP 3179)
Schedar is an orange giant star in the constellation Cassiopeia. At 228 light years away, it is the 72nd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.24. Schedar is the primary component of a multiple-star system. The iron abundance of Schedar is -0.1 (79.4% of the Sun). It is moving through the Galaxy at a speed of 20.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,200 and 25,100 light years from the center of the Galaxy.
Sky position: RA 0h 40.5m, Dec +56° 32.4'
Common designations: Schedar, Alpha Cassiopeiae, 18 Cassiopeiae, HIP 3179, HD 3712
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Brightest stars in Cassiopeia:
(list all)
| Rank | Mag. | Star |
| 1 | 2.15 | Gamma Cassiopeiae |
2
| 2.24
) Schedar
| Rank | Mag. | Star |
| 3 | 2.28 | Caph |
| 4 | 2.66 | Ruchbah |
| 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 Schedar
(compared to the Sun)
E
ccentricity: 1.8% vs. 16.0%Angle φ : 15.4°vs. 26.0°
Semi-major axis : 7,567 pc vs. 8,686 pc
Semi-minor axis: 7,566 pc vs. 8,574 pc
Focus-to-center
: 135 pcvs. 1,388 pcSemilatus rectum : 7,565 pc vs. 8,464 pc
Perigalacticon: 7,432 pc vs. 7,297 pc
Apogalacticon
: 7,702 pcvs. 10,074 pcSome Tabulated XHIP Data for Schedar
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 10.12661350° ±0.08 mas | 50.88 ±0.11 mas/yr. |
| Declination: | 56.53740925° ±0.09 mas | -32.13 ±0.10 mas/yr. |
| Galactic Longitude: | 121.41627442° | 49.46 mas/yr. |
| Galactic Latitude: | -6.30216765° | -34.27 mas/yr. |
Parallax: 14.29 ± 0.15 mas
Spectrography
Spectral Type: K0- IIIa 1989ApJS...71..245K.
Radial Velocity: -4.31 ±0.02 km/s [A rating] 2005A&A...430..165F.
Iron Abundance [Fe/H]:
-0.10 dex
2008A&A...480...91S, 2007A&A...475.1003H, 1990ApJS...74.1075M, 1981ApJ...248..228L.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 3.41 | -0.81 |
| V | 2.24 | -1.98 |
| R | ||
| I | 1.25 | -2.98 |
| J | 0.31 | -3.91 |
| H | -0.21 | -4.43 |
| K | -0.30 | -4.53 |
B-V: +1.17 V-I: +0.99
Derivations
Heliocentric distance: 69.97 pc (1.0% margin of error)
Galactocentric distance: 7,437 pc
Transverse velocity: 20.0 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -36.3 pc | 59.4 pc | -7.7 pc |
| Velocity (U, V, W) | -11.1 km/s | -13.3 km/s | -10.8 km/s |