Iota Cephei, an orange giant star in Cepheus
Iota Cephei is an orange giant star in the constellation Cepheus. At 115 light years away, it is the 288th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.5.
Iota Cephei (HIP 112724)
Iota Cephei is an orange giant star in the constellation Cepheus. At 115 light years away, it is the 288th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.50. The iron abundance of Iota Cephei is -0.03 (93.3% of the Sun). It is moving through the Galaxy at a speed of 26.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,300 and 34,000 light years from the center of the Galaxy.
Sky position: RA 22h 49.7m, Dec +66° 12'
Common designations: Iota Cephei, 32 Cephei, HIP 112724, HD 216228, HR 8694
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Brightest stars in Cepheus:
(list all)
| Rank | Mag. | Star |
| 1 | 2.45 | Alderamin |
| 2 | 3.21 | Alrai |
| 3 | 3.23 | Alfirk |
| 4 | 3.39 | Zeta Cephei |
| 5 | 3.41 | Eta Cephei |
6
| 3.50
) Iota Cephei
| Rank | Mag. | Star |
| 7 | 4.07 | Delta Cephei |
| 8 | 4.18 | Epsilon Cephei |
| 9 | 4.21 | Theta Cephei |
| 10 | 4.23 | Erakis |
| 11 | 4.24 | 2 Ursae Minoris |
| 12 | 4.25 | Nu Cephei |
| 13 | 4.26 | Alkurhah |
| 14 | 4.38 | Kappa Cephei |
| 15 | 4.41 | Pi Cephei |
| 16 | 4.52 | Upsilon-1 Cephei |
| 17 | 4.55 | 11 Cephei |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Iota Cephei
(compared to the Sun)
E
ccentricity: 20.9% vs. 16.0%Angle φ : 56.9°vs. 26.0°
Semi-major axis : 8,634 pc vs. 8,686 pc
Semi-minor axis: 8,444 pc vs. 8,574 pc
Focus-to-center
: 1,802 pcvs. 1,388 pcSemilatus rectum : 8,258 pc vs. 8,464 pc
Perigalacticon: 6,832 pc vs. 7,297 pc
Apogalacticon
: 10,436 pcvs. 10,074 pcSome Tabulated XHIP Data for Iota Cephei
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 342.42046746° ±0.09 mas | -65.89 ±0.12 mas/yr. |
| Declination: | 66.20071079° ±0.08 mas | -125.16 ±0.09 mas/yr. |
| Galactic Longitude: | 111.06542735° | -115.49 mas/yr. |
| Galactic Latitude: | 6.17521842° | -81.67 mas/yr. |
Parallax: 28.29 ± 0.10 mas
Spectrography
Spectral Type: K0- III 1989ApJS...71..245K.
Radial Velocity: -12.59 ±0.20 km/s [A rating] 2005A&A...430..165F.
Iron Abundance [Fe/H]:
-0.03 dex
2011A&A...525A..71W, 2008A&A...480...91S, 2007A&A...475.1003H, 2006A&A...456.1109M, 2001ApJ...551..L85Z, 1995AJ....110.2968L, 1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 4.55 | 1.81 |
| V | 3.50 | 0.76 |
| R | ||
| I | 2.56 | -0.18 |
| J | 1.87 | -0.87 |
| H | 1.45 | -1.29 |
| K | 1.28 | -1.47 |
B-V: +1.05 V-I: +0.94
Derivations
Heliocentric distance: 35.35 pc (0.4% margin of error)
Galactocentric distance: 7,413 pc
Transverse velocity: 23.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -12.6 pc | 32.8 pc | 3.8 pc |
| Velocity (U, V, W) | 22.0 km/s | -3.4 km/s | -15.0 km/s |