24 Ursae Majoris (HIP 46977)

24 Ursae Majoris is a yellow main-sequence star in the constellation Ursa Major. At 104 light years away, it shines at an apparent visual magnitude of 4.54. The iron abundance of 24 Ursae Majoris is -0.25 (56.2% of the Sun). It is moving through the Galaxy at a speed of 31 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,000 and 33,300 light years from the center of the Galaxy. It will come closest to the Sun 879,000 years from now when it will brighten to magnitude 2.99 from a distance of 51 light years.

Sky position: RA 9h 34.5m, Dec +69 49.8'

Common designations: d Ursae Majoris, 24 Ursae Majoris, HIP 46977, HD 82210, Gliese 355.1

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Brightest stars in Ursa Major:
(list all)

13

|    3.45

)   Tania Borealis

14

|    3.49

)   Alula Borealis

15

|    3.57

)   Kappa Ursae Majoris

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

Location of 24 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 24 Ursae Majoris

(compared to the Sun)

Eccentricity: 18.2% vs. 16.0%

Angle φ : 46.7 vs. 26.0

Semi-major axis : 8,631 pc vs. 8,686 pc

Semi-minor axis: 8,487 pc vs. 8,574 pc

Focus-to-center: 1,570 pc vs. 1,388 pc

Semilatus rectum : 8,345 pc vs. 8,464 pc

Perigalacticon: 7,061 pc vs. 7,297 pc

Apogalacticon: 10,200 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 24 Ursae Majoris
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 143.62069997 0.13 mas -63.80 0.15 mas/yr.
Declination: 69.83015424 0.13 mas 77.26 0.14 mas/yr.
     
Galactic Longitude: 142.54891787 -35.11 mas/yr.
Galactic Latitude: 38.93065753 -93.84 mas/yr.

Parallax: 31.32 0.19 mas


Spectrography

Spectral Type: G9V Fe-0.7 2003AJ....126.2048G.

Radial Velocity: -27.00 0.20 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: -0.25 dex  2011A&A...525A..71W, 2009A&A...501..941H, 2005ApJS..161..444T, 1990ApJS...74.1075M.
 



Photometry
 
band magnitude Abs. Mag.
U
B 5.32 2.80
V 4.54 2.02
R
I 3.82 1.29
J 3.16 0.64
H 2.74 0.21
K 2.51 -0.01

  B-V: +0.78       V-I: +0.72


Derivations

Heliocentric distance: 31.93 pc (0.6% margin of error)

Galactocentric distance: 7,420 pc

Transverse velocity: 15.2 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -19.7 pc 15.1 pc 20.1 pc
Velocity (U, V, W) 12.8 km/s -3.1 km/s -28.0 km/s

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