Gliese 556, an orange dwarf star in Boötes
Gliese 556 is an orange dwarf star in the constellation Boötes. At 43 light years away, it shines at an apparent visual magnitude of 7.24.
Gliese 556 (HIP 71181)
Gliese 556 is an orange dwarf star in the constellation Boötes. At 43 light years away, it shines at an apparent visual magnitude of 7.24. The iron abundance of Gliese 556 is -0.01 (97.7% of the Sun). It is moving through the Galaxy at a speed of 22.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,100 and 37,300 light years from the center of the Galaxy.
Sky position: RA 14h 33.5m, Dec +52° 54.6'
Common designations: HIP 71181, HD 128165, Gliese 556
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Galactic Orbit of
Gliese 556
(compared to the
Sun)
E
ccentricity: 21.6% vs. 16.0%Angle φ : -9.0°vs. 26.0°
Semi-major axis : 9,413 pc vs. 8,686 pc
Semi-minor axis: 9,192 pc vs. 8,574 pc
Focus-to-center
: 2,029 pcvs. 1,388 pcSemilatus rectum : 8,976 pc vs. 8,464 pc
Perigalacticon: 7,384 pc vs. 7,297 pc
Apogalacticon
: 11,443 pcvs. 10,074 pcSome Tabulated XHIP Data for Gliese 556
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 218.37105425° ±0.34 mas | -191.79 ±0.34 mas/yr. |
| Declination: | 52.90818819° ±0.35 mas | 248.41 ±0.34 mas/yr. |
| Galactic Longitude: | 93.57170555° | 312.12 mas/yr. |
| Galactic Latitude: | 58.00965869° | -32.71 mas/yr. |
Parallax: 75.65 ± 0.42 mas
Spectrography
Spectral Type: K3. V 1953ApJ...118...92M.
Radial Velocity: 11.01 ±0.25 km/s [A rating] 1992A&A...256..121T, 2005ApJS..159..141V.
Iron Abundance [Fe/H]:
-0.01 dex
2009A&A...501..941H, 2008A&A...480...91S, 2006AJ....131.3069L, 2006A&A...454..833K, 2005ApJS..159..141V, 2005AJ....129.1063L.
Photometry
| band | magnitude | Abs. Mag. |
| U | ||
| B | 8.24 | 7.63 |
| V | 7.24 | 6.63 |
| R | 6.70 | 6.09 |
| I | 6.20 | 5.59 |
| J | 5.44 | 4.83 |
| H | 4.87 | 4.27 |
| K | 4.79 | 4.18 |
B-V: +1.00 V-I: +1.04
Derivations
Heliocentric distance: 13.22 pc (0.6% margin of error)
Galactocentric distance: 7,400 pc
Transverse velocity: 19.7 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -0.4 pc | 7.0 pc | 11.2 pc |
| Velocity (U, V, W) | -20.0 km/s | 6.3 km/s | 8.3 km/s |