Gliese 809, a red dwarf star in Cepheus
Gliese 809 is a red dwarf star in the constellation Cepheus. At 23.0 light years away, it shines at an apparent visual magnitude of 8.55.
Gliese 809 (HIP 103096)
Gliese 809 is a red dwarf star in the constellation Cepheus. At 23.0 light years away, it shines at an apparent visual magnitude of 8.55. Gliese 809 is the primary component of a multiple-star system. The iron abundance of Gliese 809 is -0.11 (77.6% of the Sun). It is moving through the Galaxy at a speed of 31.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,300 and 30,600 light years from the center of the Galaxy.
Sky position: RA 20h 53.3m, Dec +62° 9.6'
Common designations: HIP 103096, HD 199305, Gliese 809
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Galactic Orbit of
Gliese 809
(compared to the
Sun)
E
ccentricity: 17.8% vs. 16.0%Angle φ : 76.6°vs. 26.0°
Semi-major axis : 7,958 pc vs. 8,686 pc
Semi-minor axis: 7,831 pc vs. 8,574 pc
Focus-to-center
: 1,415 pcvs. 1,388 pcSemilatus rectum : 7,706 pc vs. 8,464 pc
Perigalacticon: 6,543 pc vs. 7,297 pc
Apogalacticon
: 9,372 pcvs. 10,074 pcSome Tabulated XHIP Data for Gliese 809
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 313.33245236° ±0.57 mas | 1.50 ±0.55 mas/yr. |
| Declination: | 62.15627229° ±0.56 mas | -774.60 ±0.64 mas/yr. |
| Galactic Longitude: | 98.71396722° | -604.53 mas/yr. |
| Galactic Latitude: | 11.09217525° | -484.30 mas/yr. |
Parallax: 141.87 ± 0.64 mas
Spectrography
Spectral Type: M0.0V 2002AJ....123.2002H.
Radial Velocity: -17.30 ±0.09 km/s [A rating] 2002ApJS..141..503N, 1992A&A...256..121T.
Iron Abundance [Fe/H]:
-0.11 ±0.05 dex
2008A&A...480...91S, 2005MNRAS.356..963W.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 10.03 | 10.79 |
| V | 8.55 | 9.31 |
| R | 7.70 | 8.46 |
| I | 6.90 | 7.66 |
| J | 5.43 | 6.19 |
| H | 4.92 | 5.68 |
| K | 4.62 | 5.38 |
B-V: +1.48 V-I: +1.65
Derivations
Heliocentric distance: 7.05 pc (0.5% margin of error)
Galactocentric distance: 7,401 pc
Transverse velocity: 25.9 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -1.0 pc | 6.8 pc | 1.4 pc |
| Velocity (U, V, W) | 22.1 km/s | -10.6 km/s | -19.2 km/s |