83 Ursae Majoris (HIP 66738)

83 Ursae Majoris is a red giant star in the constellation Ursa Major. At 522 light years away, it shines at an apparent visual magnitude of 4.63. The iron abundance of 83 Ursae Majoris is +0.3 (199.5% of the Sun). It is moving through the Galaxy at a speed of 24.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 20,800 and 24,500 light years from the center of the Galaxy. It will come closest to the Sun 4.7 million years from now when it will brighten to magnitude 3.74 from a distance of 348 light years.

Sky position: RA 13h 40.7m, Dec +54░ 40.8'

Common designations: 83 Ursae Majoris, HIP 66738, HD 119228, HR 5154

Galaxies
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Brightest stars in Ursa Major:
(list all)

16

|    3.65

)   23 Ursae Majoris

17

|    3.69

)   Alkaphrah

18

|    3.78

)   Upsilon Ursae Majoris

19

|    3.99

)   Alcor

20

|    4.46

)   15 Ursae Majoris

21

|    4.47

)   26 Ursae Majoris

22

|    4.54

)   24 Ursae Majoris

23

|    4.55

)   Phi Ursae Majoris

24

|    4.59

)   Muscida

25

|    4.63

)   83 Ursae Majoris

26

|    4.66

)   Omega Ursae Majoris

27

|    4.67

)   Tau Ursae Majoris

28

|    4.72

)   HR 4132

29

|    4.74

)   Rho Ursae Majoris

30

|    4.76

)   55 Ursae Majoris

31

|    4.80

)   Sigma-2 Ursae Majoris

32

|    4.80

)   18 Ursae Majoris

Location of 83 Ursae Majoris circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of 83 Ursae Majoris

(compared to the Sun)

Eccentricity: 8.1% vs. 16.0%

Angle φ : 151.1░ vs. 26.0░

Semi-major axis : 6,943 pc vs. 8,686 pc

Semi-minor axis: 6,920 pc vs. 8,574 pc

Focus-to-center: 565 pc vs. 1,388 pc

Semilatus rectum : 6,897 pc vs. 8,464 pc

Perigalacticon: 6,378 pc vs. 7,297 pc

Apogalacticon: 7,508 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 83 Ursae Majoris
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 205.18455243░ ▒0.15 mas -19.08 ▒0.19 mas/yr.
Declination: 54.68166154░ ▒0.18 mas -10.60 ▒0.20 mas/yr.
     
Galactic Longitude: 108.17980093░ 13.40 mas/yr.
Galactic Latitude: 61.01203300░ 17.23 mas/yr.

Parallax: 6.23 ▒ 0.22 mas


Spectrography

Spectral Type: M2III 1989ApJS...71..245K.

Radial Velocity: -18.61 ▒0.20 km/s [A rating] 2005A&A...430..165F.

Iron Abundance [Fe/H]: 0.30 dex  1990AJ.....99.1961F.
 



Photometry
 
band magnitude Abs. Mag.
U
B 6.26 0.24
V 4.63 -1.39
R
I 2.85 -3.17
J 1.36 -4.66
H 0.50 -5.52
K 0.34 -5.69

  B-V: +1.63       V-I: +1.78


Derivations

Heliocentric distance: 160.27 pc (3.5% margin of error)

Galactocentric distance: 7,426 pc

Transverse velocity: 16.6 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -24.2 pc 73.8 pc 140.2 pc
Velocity (U, V, W) -3.3 km/s -22.6 km/s -9.9 km/s

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