Albireo A, an orange bright giant star in Cygnus
Albireo A is an orange bright giant star in the constellation Cygnus. At 433 light years away, it is the 185th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.05.
Albireo A (HIP 95947)
Albireo A is an orange bright giant star in the constellation Cygnus. At 433 light years away, it is the 185th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.05. Albireo A is a component of a multiple-star system. The iron abundance of Albireo A is -0.08 (83.2% of the Sun). It is moving through the Galaxy at a speed of 24.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,600 and 23,900 light years from the center of the Galaxy. It will come closest to the Sun 5.4 million years from now when it will brighten to magnitude -3.30 from a distance of 23.2 light years.
Sky position: RA 19h 30.7m, Dec +27° 57.6'
Common designations: Albireo A, Beta-1 Cygni, 6 Cygni, HIP 95947, HD 183912, HR 7417
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Brightest stars in Cygnus:
(list all)
| Rank | Mag. | Star |
| 1 | 1.25 | Deneb |
| 2 | 2.23 | Sadr |
| 3 | 2.48 | Gienah |
| 4 | 2.86 | Delta Cygni |
5
| 3.05
) Albireo A
| Rank | Mag. | Star |
| 6 | 3.21 | Zeta Cygni |
| 7 | 3.72 | Xi Cygni |
| 8 | 3.74 | Tau Cygni |
| 9 | 3.76 | Iota Cygni |
| 10 | 3.80 | Kappa Cygni |
| 11 | 3.80 | Omicron-1 Cygni |
| 12 | 3.89 | Eta Cygni |
| 13 | 3.94 | Nu Cygni |
| 14 | 3.96 | Omicron-2 Cygni |
| 15 | 3.98 | Rho Cygni |
| 16 | 4.01 | 41 Cygni |
| 17 | 4.22 | 52 Cygni |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Albireo A
(compared to the Sun)
E
ccentricity: 7.5% vs. 16.0%Angle φ : 178.6°vs. 26.0°
Semi-major axis : 6,828 pc vs. 8,686 pc
Semi-minor axis: 6,808 pc vs. 8,574 pc
Focus-to-center
: 512 pcvs. 1,388 pcSemilatus rectum : 6,789 pc vs. 8,464 pc
Perigalacticon: 6,316 pc vs. 7,297 pc
Apogalacticon
: 7,339 pcvs. 10,074 pcSome Tabulated XHIP Data for Albireo A
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 292.68035521° ±0.20 mas | -1.50 ±0.30 mas/yr. |
| Declination: | 27.95969502° ±0.28 mas | -1.40 ±0.30 mas/yr. |
| Galactic Longitude: | 62.10965494° | -1.94 mas/yr. |
| Galactic Latitude: | 4.57150115° | 0.65 mas/yr. |
Parallax: 7.51 ± 0.33 mas
Spectrography
Spectral Type: K2II 2002ApJS..143..513G.
Radial Velocity: -24.07 ±0.12 km/s [A rating] 2005A&A...430..165F.
Iron Abundance [Fe/H]:
-0.08 dex
1990ApJS...74.1075M.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 4.14 | -1.48 |
| V | 3.05 | -2.57 |
| R | ||
| I | 2.15 | -3.47 |
| J | 1.13 | -4.49 |
| H | 0.46 | -5.15 |
| K | 0.39 | -5.22 |
B-V: +1.09 V-I: +0.90
Derivations
Heliocentric distance: 132.85 pc (4.4% margin of error)
Galactocentric distance: 7,339 pc
Transverse velocity: 1.3 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | 61.9 pc | 117.0 pc | 10.6 pc |
| Velocity (U, V, W) | -10.2 km/s | -21.8 km/s | -1.5 km/s |