Gliese 15 A, a red dwarf star in Andromeda
Gliese 15 A is a red dwarf star in the constellation Andromeda. At 11.7 light years away, it shines at an apparent visual magnitude of 8.09.
Gliese 15 A (HIP 1475)
Gliese 15 A is a red dwarf star in the constellation Andromeda. At 11.7 light years away, it shines at an apparent visual magnitude of 8.09. Gliese 15 A is the primary component of a multiple-star system. It is moving through the Galaxy at a speed of 50.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,000 and 29,700 light years from the center of the Galaxy.
Sky position: RA 0h 18.3m, Dec +44° 1.2'
Common designations: HIP 1475, HD 1326, Gliese 15 A
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Galactic Orbit of
Gliese 15 A
(compared to the
Sun)
E
ccentricity: 17.2% vs. 16.0%Angle φ : -83.1°vs. 26.0°
Semi-major axis : 7,785 pc vs. 8,686 pc
Semi-minor axis: 7,669 pc vs. 8,574 pc
Focus-to-center
: 1,340 pcvs. 1,388 pcSemilatus rectum : 7,555 pc vs. 8,464 pc
Perigalacticon: 6,445 pc vs. 7,297 pc
Apogalacticon
: 9,125 pcvs. 10,074 pcSome Tabulated XHIP Data for Gliese 15 A
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 4.58559072° ±0.52 mas | 2,887.50 ±1.00 mas/yr. |
| Declination: | 44.02195596° ±0.40 mas | 408.90 ±1.00 mas/yr. |
| Galactic Longitude: | 116.66943324° | 2,916.27 mas/yr. |
| Galactic Latitude: | -18.44699193° | 15.31 mas/yr. |
Parallax: 278.76 ± 0.77 mas
Spectrography
Spectral Type: M2V 2006PASP..118..814T.
Radial Velocity: 11.62 ±0.08 km/s [A rating] 2002ApJS..141..503N, 1992A&A...256..121T.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
10.30
12.53
B
9.65
11.88
V
8.09
10.32
R
7.30
9.53
I
6.40
8.63
J
5.25
7.48
H
4.48
6.70
K
4.02
6.24
B-V: +1.56 V-I: +1.69
Derivations
Heliocentric distance: 3.59 pc (0.3% margin of error)
Galactocentric distance: 7,402 pc
Transverse velocity: 49.6 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -1.5 pc | 3.0 pc | -1.1 pc |
| Velocity (U, V, W) | -49.3 km/s | -12.3 km/s | -3.4 km/s |