20 Puppis (HIP 40259)

20 Puppis is a yellow supergiant star in the constellation Puppis. At 863 light years away, it shines at an apparent visual magnitude of 4.99. The iron abundance of 20 Puppis is -0.18 (66.1% of the Sun). It is moving through the Galaxy at a speed of 23.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 26,400 light years from the center of the Galaxy. It came closest to the Sun 8.0 million years ago when it had brightened to magnitude 4.19 from a distance of 598 light years.

Sky position: RA 8h 13.3m, Dec -15 47.4'

Common designations: 20 Puppis, HIP 40259, HD 68752

Beautiful & Sophisticated!

2014 Moon Calendar
Makes a great gift!


Brightest stars in Puppis:
(list all)

40

|    4.83

)   A Puppis

41

|    4.83

)   w Puppis

42

|    4.84

)   d1 Puppis

43

|    4.85

)   HD 59612

44

|    4.87

)   L1 Puppis

45

|    4.92

)   H Puppis

46

|    4.94

)   HR 2608

47

|    4.98

)   140 Puppis

48

|    4.99

)   HR 2549

49

|    4.99

)   20 Puppis

50

|    5.01

)   212 Puppis

51

|    5.03

)   HR 2770

52

|    5.03

)   4 Puppis

53

|    5.04

)   Gliese 284

54

|    5.05

)   Y Puppis

55

|    5.06

)   n Puppis

56

|    5.07

)   t Puppis

Location of 20 Puppis circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of 20 Puppis

(compared to the Sun)

Eccentricity: 4.0% vs. 16.0%

Angle φ : 39.7 vs. 26.0

Semi-major axis : 7,792 pc vs. 8,686 pc

Semi-minor axis: 7,785 pc vs. 8,574 pc

Focus-to-center: 312 pc vs. 1,388 pc

Semilatus rectum : 7,779 pc vs. 8,464 pc

Perigalacticon: 7,479 pc vs. 7,297 pc

Apogalacticon: 8,104 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 20 Puppis
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 123.33322946 0.22 mas -12.46 0.21 mas/yr.
Declination: -15.78821465 0.22 mas -3.20 0.23 mas/yr.
     
Galactic Longitude: 236.62658598 -3.92 mas/yr.
Galactic Latitude: 10.10713109 -12.26 mas/yr.

Parallax: 3.75 0.30 mas


Spectrography

Spectral Type: G4Ib-II 1989ApJS...71..245K.

Radial Velocity: 16.80 0.30 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: -0.18 0.06 dex  1990ApJS...74.1075M.
 



Photometry
 
band magnitude Abs. Mag.
U
B 6.06 -1.06
V 4.99 -2.12
R
I 4.09 -3.02
J 3.41 -3.70
H 2.89 -4.22
K 2.76 -4.36

  B-V: +1.07       V-I: +0.90


Derivations

Heliocentric distance: 264.63 pc (8.0% margin of error)

Galactocentric distance: 7,546 pc

Transverse velocity: 16.1 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -143.3 pc -217.6 pc 46.4 pc
Velocity (U, V, W) -14.7 km/s -13.4 km/s -12.2 km/s

< Previous | HIP  40259 | Next >