Beta Reticuli (HIP 17440)

Beta Reticuli is an orange giant star in the constellation Reticulum. At 100 light years away, it is the 423rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.84. Beta Reticuli is the primary component of a multiple-star system. It is moving through the Galaxy at a speed of 69.2 km/s relative to the Sun. Its projected Galactic orbit carries it between 10,100 and 24,200 light years from the center of the Galaxy. It came closest to the Sun 319,000 years ago when it had brightened to magnitude 2.98 from a distance of 67 light years.

Sky position: RA 3h 44.2m, Dec -64 48.6'

Common designations: Beta Reticuli, HIP 17440, HD 23817, Gliese 9129

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Brightest stars in Reticulum:
(list all)

1

|    3.33

)   Alpha Reticuli

2

|    3.84

)   Beta Reticuli

3

|    4.44

)   Epsilon Reticuli

4

|    4.48

)   Gamma Reticuli

5

|    4.56

)   Delta Reticuli

6

|    4.71

)   Kappa Reticuli

7

|    4.97

)   Iota Reticuli

8

|    5.24

)   Zeta-2 Reticuli

9

|    5.24

)   Eta Reticuli

10

|    5.45

)   HR 1340

11

|    5.53

)   Zeta-1 Reticuli

12

|    5.74

)   HR 1435

13

|    5.79

)   HR 1475

14

|    5.81

)   HR 1092

15

|    5.88

)   Theta Reticuli

16

|    5.94

)   HR 1416

17

|    6.03

)   HR 1014

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Galactic Orbit of Beta Reticuli

(compared to the Sun)

Eccentricity: 41.2% vs. 16.0%

Angle φ : -174.7 vs. 26.0

Semi-major axis : 5,255 pc vs. 8,686 pc

Semi-minor axis: 4,790 pc vs. 8,574 pc

Focus-to-center: 2,163 pc vs. 1,388 pc

Semilatus rectum : 4,365 pc vs. 8,464 pc

Perigalacticon: 3,092 pc vs. 7,297 pc

Apogalacticon: 7,419 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Beta Reticuli
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 56.04814541 1.29 mas 310.70 0.90 mas/yr.
Declination: -64.80709398 1.20 mas 83.50 0.90 mas/yr.
     
Galactic Longitude: 279.23673481 -238.63 mas/yr.
Galactic Latitude: -43.53704129 215.79 mas/yr.

Parallax: 32.71 0.46 mas


Spectrography

Spectral Type: K2III 2006AJ....132..161G.

Radial Velocity: 51.10 4.10 km/s [D rating] 2006AstL...32..759G.
This star is a spectroscopic binary with an unsolved orbit.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 4.97 2.55
V 3.84 1.41
R
I 2.85 0.43
J 1.94 -0.49
H 1.37 -1.05
K 1.28 -1.15

  B-V: +1.13       V-I: +0.99


Derivations

Heliocentric distance: 30.56 pc (1.4% margin of error)

Galactocentric distance: 7,396 pc

Transverse velocity: 46.6 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 3.6 pc -21.9 pc -21.1 pc
Velocity (U, V, W) -24.7 km/s -63.4 km/s -12.5 km/s

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