Gamma Cassiopeiae, a blue subgiant star in Cassiopeia
Gamma Cassiopeiae is a blue subgiant star in the constellation Cassiopeia. At 549 light years away, it is the 64th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.15.
Gamma Cassiopeiae (HIP 4427)
Gamma Cassiopeiae is a blue subgiant star in the constellation Cassiopeia. At 549 light years away, it is the 64th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 2.15. Gamma Cassiopeiae is a multiple-star system. The iron abundance of Gamma Cassiopeiae is +0.02 (104.7% of the Sun). It is moving through the Galaxy at a speed of 20.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,100 and 25,100 light years from the center of the Galaxy.
Sky position: RA 0h 56.7m, Dec +60° 43.2'
Common designations: Gamma Cassiopeiae, 27 Cassiopeiae, HIP 4427, HD 5394
Stars of the Northern Hemisphere
The Modern Guide to the Stars
Brightest stars in Cassiopeia:
(list all)
1
| 2.15
) Gamma Cassiopeiae
| Rank | Mag. | Star |
| 2 | 2.24 | Schedar |
| 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 Gamma Cassiopeiae
(compared to the Sun)
E
ccentricity: 2.1% vs. 16.0%Angle φ : -73.6°vs. 26.0°
Semi-major axis : 7,542 pc vs. 8,686 pc
Semi-minor axis: 7,540 pc vs. 8,574 pc
Focus-to-center
: 158 pcvs. 1,388 pcSemilatus rectum : 7,539 pc vs. 8,464 pc
Perigalacticon: 7,384 pc vs. 7,297 pc
Apogalacticon
: 7,700 pcvs. 10,074 pcSome Tabulated XHIP Data for Gamma Cassiopeiae
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 14.17708782° ±0.07 mas | 25.17 ±0.08 mas/yr. |
| Declination: | 60.71674955° ±0.07 mas | -3.92 ±0.08 mas/yr. |
| Galactic Longitude: | 123.57680832° | 25.25 mas/yr. |
| Galactic Latitude: | -2.14840092° | -3.40 mas/yr. |
Parallax: 5.94 ± 0.12 mas
Spectrography
Spectral Type: B0.5IVe 1982ApJS...50...55S.
Radial Velocity: -4.80 ±1.90 km/s [A rating] 2006AstL...32..759G.
Iron Abundance [Fe/H]:
0.02 dex
2011A&A...525A..71W.
Photometry
| band | magnitude | Abs. Mag. |
| U | 1.24 | -4.89 |
| B | 2.10 | -4.03 |
| V | 2.15 | -3.98 |
| R | 2.32 | -3.81 |
| I | 2.40 | -3.73 |
| J | 2.04 | -4.09 |
| H | 1.99 | -4.14 |
| K | 1.76 | -4.37 |
B-V: -0.05 V-I: -0.25
Derivations
Heliocentric distance: 168.27 pc (2.0% margin of error)
Galactocentric distance: 7,494 pc
Transverse velocity: 20.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -93.0 pc | 140.1 pc | -6.3 pc |
| Velocity (U, V, W) | -14.1 km/s | -15.2 km/s | -2.5 km/s |