Subra, a white main-sequence star in Leo
Subra is a white main-sequence star in the constellation Leo. At 130 light years away, it is the 292nd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.52.
Subra (HIP 47508)
Subra is a white main-sequence star in the constellation Leo. At 130 light years away, it is the 292nd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.52. Subra is the primary component of a multiple-star system. It is moving through the Galaxy at a speed of 38.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,500 and 25,200 light years from the center of the Galaxy. It came closest to the Sun 700,000 years ago when it had brightened to magnitude 2.83 from a distance of 95 light years.
Sky position: RA 9h 41.2m, Dec +9° 53.4'
Common designations: Subra, Omicron Leonis, 14 Leonis, HIP 47508, HD 83808
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Brightest stars in Leo:
(list all)
| Rank | Mag. | Star |
| 1 | 1.36 | Regulus |
| 2 | 2.01 | Algieba |
| 3 | 2.14 | Denebola |
| 4 | 2.56 | Zosma |
| 5 | 2.97 | Ras Elased Australis |
| 6 | 3.33 | Chertan |
| 7 | 3.43 | Adhafera |
| 8 | 3.48 | Al'dzhabkhakh |
9
| 3.52
) Subra
| Rank | Mag. | Star |
| 10 | 3.84 | Rho Leonis |
| 11 | 3.88 | Ras Elased Borealis |
| 12 | 4.00 | Iota Leonis |
| 13 | 4.05 | Sigma Leonis |
| 14 | 4.30 | 54 Leonis |
| 15 | 4.30 | Upsilon Leonis |
| 16 | 4.32 | Alterf |
| 17 | 4.39 | A Leonis |
Hover over other bright stars to identify or click to jump.
Galactic Orbit of Subra
(compared to the Sun)
E
ccentricity: 10.2% vs. 16.0%Angle φ : -130.5°vs. 26.0°
Semi-major axis : 7,003 pc vs. 8,686 pc
Semi-minor axis: 6,966 pc vs. 8,574 pc
Focus-to-center
: 713 pcvs. 1,388 pcSemilatus rectum : 6,930 pc vs. 8,464 pc
Perigalacticon: 6,290 pc vs. 7,297 pc
Apogalacticon
: 7,716 pcvs. 10,074 pcSome Tabulated XHIP Data for Subra
(see also: SIMBAD)
Astrometry
2007A&A...474..653V
| Position | Proper Motion | |
| Right Ascension: | 145.28799101° ±0.18 mas | -142.20 ±0.30 mas/yr. |
| Declination: | 9.89239880° ±0.14 mas | -37.50 ±0.30 mas/yr. |
| Galactic Longitude: | 224.60029053° | -33.10 mas/yr. |
| Galactic Latitude: | 42.05610283° | -143.29 mas/yr. |
Parallax: 25.03 ± 0.22 mas
Spectrography
Spectral Type: A5. V COMP 1955ApJ...121..653S.
Radial Velocity:
26.18 ±0.05 km/s [A rating]
2004A&A...424..727P.
This star is a spectroscopic binary with a solved orbit.
Iron Abundance [Fe/H]:
n/a
Photometry
band
magnitude
Abs. Mag.
U
B
4.04
1.03
V
3.52
0.51
R
I
2.99
-0.02
J
2.77
-0.24
H
2.60
-0.40
K
2.50
-0.50
B-V: +0.52 V-I: +0.53
Derivations
Heliocentric distance: 39.95 pc (0.9% margin of error)
Galactocentric distance: 7,421 pc
Transverse velocity: 27.8 km/s
3D heliocentric position and motion:
|
toward: |
Galactic center | Galactic rotation | North Galactic Pole |
| Position ( X, Y, Z) | -21.1 pc | -20.8 pc | 26.8 pc |
| Velocity (U, V, W) | -31.2 km/s | -21.9 km/s | -2.6 km/s |