Nu Puppis (HIP 31685)

Nu Puppis is a blue giant star in the constellation Puppis. At 371 light years away, it is the 203rd brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.17. It is moving through the Galaxy at a speed of 31 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,000 and 24,400 light years from the center of the Galaxy. It came closest to the Sun 3.6 million years ago when it had brightened to magnitude -2.57 from a distance of 26 light years.

Sky position: RA 6h 37.8m, Dec -43 12'

Common designations: Nu Puppis, HIP 31685, HD 47670, HR 2451

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Brightest stars in Puppis:
(list all)

1

|    2.21

)   Naos

2

|    2.71

)   Pi Puppis

3

|    2.83

)   Rho Puppis

4

|    2.94

)   Tau Puppis

5

|    3.17

)   Nu Puppis

6

|    3.25

)   Sigma Puppis

7

|    3.34

)   Azmidiske

8

|    3.62

)   c Puppis

9

|    3.71

)   a Puppis

10

|    3.80

)   Markeb

11

|    3.94

)   3 Puppis

12

|    4.10

)   HR 3055

13

|    4.20

)   11 Puppis

14

|    4.22

)   J Puppis

15

|    4.40

)   Omicron Puppis

16

|    4.40

)   16 Puppis

17

|    4.42

)   L2 Puppis

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


Galactic Orbit of Nu Puppis

(compared to the Sun)

Eccentricity: 12.6% vs. 16.0%

Angle φ : 160.4 vs. 26.0

Semi-major axis : 6,655 pc vs. 8,686 pc

Semi-minor axis: 6,602 pc vs. 8,574 pc

Focus-to-center: 841 pc vs. 1,388 pc

Semilatus rectum : 6,549 pc vs. 8,464 pc

Perigalacticon: 5,814 pc vs. 7,297 pc

Apogalacticon: 7,496 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Nu Puppis
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 99.44029877 0.20 mas -0.44 0.20 mas/yr.
Declination: -43.19592397 0.27 mas -4.07 0.31 mas/yr.
     
Galactic Longitude: 251.93530419 3.72 mas/yr.
Galactic Latitude: -20.53714276 -1.70 mas/yr.

Parallax: 8.78 0.26 mas


Spectrography

Spectral Type: B7III 2009A&A...501..297Z.

Radial Velocity: 30.90 1.70 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 



Photometry
 
band magnitude Abs. Mag.
U 2.65 -2.63
B 3.07 -2.21
V 3.17 -2.11
R
I 3.23 -2.05
J 3.51 -1.77
H 3.49 -1.79
K 3.56 -1.72

  B-V: -0.10       V-I: -0.06


Derivations

Heliocentric distance: 113.78 pc (3.0% margin of error)

Galactocentric distance: 7,434 pc

Transverse velocity: 2.2 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -33.0 pc -101.3 pc -39.9 pc
Velocity (U, V, W) -7.0 km/s -27.8 km/s -11.7 km/s

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