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

Moon Calendar Cards

6" x 11" Postcards


Brightest stars in Leo:
(list all)

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

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

Location of Subra circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of Subra

(compared to the Sun)

Eccentricity: 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 pc vs. 1,388 pc

Semilatus rectum : 6,930 pc vs. 8,464 pc

Perigalacticon: 6,290 pc vs. 7,297 pc

Apogalacticon: 7,716 pc vs. 10,074 pc
 


Some 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

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