HR 3131 (HIP 39095)

HR 3131 is a white main-sequence star in the constellation Puppis. At 240 light years away, it shines at an apparent visual magnitude of 4.61. It is moving through the Galaxy at a speed of 18.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,100 and 39,000 light years from the center of the Galaxy. It will come closest to the Sun 2.8 million years from now when it will brighten to magnitude 3.80 from a distance of 166 light years.

Sky position: RA 7h 59.9m, Dec -18 24'

Common designations: HIP 39095, HD 65810, HR 3131

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Brightest stars in Puppis:
(list all)

17

|    4.42

)   L2 Puppis

18

|    4.42

)   h2 Puppis

19

|    4.44

)   Gliese 279

20

|    4.44

)   h1 Puppis

21

|    4.44

)   q Puppis

22

|    4.47

)   V Puppis

23

|    4.49

)   I Puppis

24

|    4.49

)   b Puppis

25

|    4.53

)   f Puppis

26

|    4.61

)   HR 3131

27

|    4.63

)   1 Puppis

28

|    4.63

)   HR 3089

29

|    4.65

)   v1 Puppis

30

|    4.65

)   HR 2881

31

|    4.65

)   HR 2922

32

|    4.69

)   m Puppis

33

|    4.69

)   Q Puppis

Location of HR 3131 circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of HR 3131

(compared to the Sun)

Eccentricity: 25.5% vs. 16.0%

Angle φ : 39.2 vs. 26.0

Semi-major axis : 9,531 pc vs. 8,686 pc

Semi-minor axis: 9,216 pc vs. 8,574 pc

Focus-to-center: 2,431 pc vs. 1,388 pc

Semilatus rectum : 8,911 pc vs. 8,464 pc

Perigalacticon: 7,100 pc vs. 7,297 pc

Apogalacticon: 11,963 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for HR 3131
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 119.96689623 0.46 mas -3.60 0.80 mas/yr.
Declination: -18.39914270 0.40 mas -36.00 0.80 mas/yr.
     
Galactic Longitude: 237.16410929 28.93 mas/yr.
Galactic Latitude: 5.99807058 -21.73 mas/yr.

Parallax: 13.52 0.64 mas


Spectrography

Spectral Type: A1 V 1988MSS...C04....0H.

Radial Velocity: -13.30 1.20 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U
B 4.70 0.36
V 4.61 0.27
R
I 4.51 0.17
J 4.58 0.24
H 4.36 0.02
K 4.31 -0.03

  B-V: +0.09       V-I: +0.10


Derivations

Heliocentric distance: 73.77 pc (4.7% margin of error)

Galactocentric distance: 7,440 pc

Transverse velocity: 12.7 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -39.8 pc -61.6 pc 7.7 pc
Velocity (U, V, W) 15.2 km/s 5.0 km/s -8.9 km/s

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