Omega Draconis, a white main-sequence star in Draco
Omega Draconis is a white main-sequence star in the constellation Draco. At 76 light years away, it shines at an apparent visual magnitude of 4.77.
Omega Draconis (HIP 86201)
Omega Draconis is a white main-sequence star in the constellation Draco. At 76 light years away, it shines at an apparent visual magnitude of 4.77. Omega Draconis is the primary component of a multiple-star system. The star's age is estimated to be 1.9 billion years but is certainly no less than 1.8 billion years and no greater than 2.2 billion years. The iron abundance of Omega Draconis is +0.18 (151.4% of the Sun). It is moving through the Galaxy at a speed of 37.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,000 and 26,500 light years from the center of the Galaxy.
Sky position: RA 17h 37.0m, Dec +68° 45.6'
Common designations: Omega Draconis, 28 Draconis, HIP 86201, HD 160922, HR 6596, Gliese 4017
Now in production...
Brightest stars in Draco:
(list all)
| Rank | Mag. | Star |
| 14 | 4.22 | Phi Draconis |
| 15 | 4.28 | HR 3751 |
| 16 | 4.45 | Tau Draconis |
| 17 | 4.51 | Rho Draconis |
| 18 | 4.57 | Dziban |
| 19 | 4.58 | 10 Draconis |
| 20 | 4.60 | Pi Draconis |
| 21 | 4.63 | Omicron Draconis |
| 22 | 4.67 | Alsafi |
23
| 4.77
) Omega Draconis
| Rank | Mag. | Star |
| 24 | 4.77 | 45 Draconis |
| 25 | 4.82 | 42 Draconis |
| 26 | 4.82 | Upsilon Draconis |
| 27 | 4.84 | 18 Draconis |
| 28 | 4.84 | Gliese 9578 |
| 29 | 4.86 | HR 4126 |
| 30 | 4.86 | Kuma |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Omega Draconis
(compared to the Sun)
E
ccentricity: 9.4% vs. 16.0%Angle φ : -92.7°vs. 26.0°
Semi-major axis : 7,436 pc vs. 8,686 pc
Semi-minor axis: 7,403 pc vs. 8,574 pc
Focus-to-center
: 698 pcvs. 1,388 pcSemilatus rectum : 7,370 pc vs. 8,464 pc
Perigalacticon: 6,738 pc vs. 7,297 pc
Apogalacticon
: 8,134 pcvs. 10,074 pcSome Tabulated XHIP Data for Omega Draconis
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 264.23787447° ±0.17 mas | 1.80 ±0.60 mas/yr. |
| Declination: | 68.75718916° ±0.17 mas | 321.10 ±0.70 mas/yr. |
| Galactic Longitude: | 99.08498504° | 318.67 mas/yr. |
| Galactic Latitude: | 31.86829852° | -39.47 mas/yr. |
Parallax: 43.17 ± 0.17 mas
Spectrography
Spectral Type: F4V 2009ApJS..180..117A.
Radial Velocity:
-13.98 ±0.02 km/s [A rating]
2004A&A...424..727P.
This star is a spectroscopic binary with a solved orbit.
Iron Abundance [Fe/H]:
0.18 ±0.05 dex
2011A&A...530A.138C, 1986ApJ...303..724B.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 5.20 | 3.38 |
| V | 4.77 | 2.95 |
| R | 4.50 | 2.68 |
| I | 4.30 | 2.48 |
| J | 3.83 | 2.00 |
| H | 3.70 | 1.87 |
| K | 3.62 | 1.80 |
B-V: +0.43 V-I: +0.47
Derivations
Heliocentric distance: 23.16 pc (0.4% margin of error)
Galactocentric distance: 7,403 pc
Transverse velocity: 35.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -3.1 pc | 19.4 pc | 12.2 pc |
| Velocity (U, V, W) | -33.0 km/s | -15.0 km/s | -11.1 km/s |