A Puppis (HIP 34495)

A Puppis is a blue subgiant star in the constellation Puppis. At 774 light years away, it shines at an apparent visual magnitude of 4.83. It is moving through the Galaxy at a speed of 24.5 km/s relative to the Sun and is part of the Collinder 135 moving group. Its projected Galactic orbit carries it between 24,300 and 26,300 light years from the center of the Galaxy. It came closest to the Sun 7.5 million years ago when it had brightened to magnitude 3.74 from a distance of 470 light years.

Sky position: RA 7h 8.9m, Dec -39° 39.6'

Common designations: A Puppis, HIP 34495, HD 54893, HR 2702

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Stars of the Northern Hemisphere
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Brightest stars in Puppis:
(list all)

31

|    4.65

)   HR 2922

32

|    4.69

)   m Puppis

33

|    4.69

)   Q Puppis

34

|    4.72

)   19 Puppis

35

|    4.73

)   HR 3226

36

|    4.75

)   HR 2762

37

|    4.76

)   chi Puppis

38

|    4.78

)   r Puppis

39

|    4.82

)   HD 60414

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

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

Galactic Orbit of A Puppis
(compared to the Sun)

Eccentricity: 3.8% vs. 16.0%

Angle φ : 15.9° vs. 26.0°

Semi-major axis : 7,763 pc vs. 8,686 pc

Semi-minor axis: 7,757 pc vs. 8,574 pc

Focus-to-center: 294 pc vs. 1,388 pc

Semilatus rectum : 7,751 pc vs. 8,464 pc

Perigalacticon: 7,469 pc vs. 7,297 pc

Apogalacticon: 8,056 pc vs. 10,074 pc
 
Some Tabulated XHIP Data for A Puppis
(see also: SIMBAD)

Astrometry
 2007A&A...474..653V
  Position Proper Motion
Right Ascension: 107.21281818° ±0.10 mas -10.69 ±0.12 mas/yr.
Declination: -39.65567373° ±0.13 mas 7.77 ±0.17 mas/yr.
     
Galactic Longitude: 250.69210324° -11.44 mas/yr.
Galactic Latitude: -13.82664666° -6.62 mas/yr.

Parallax: 4.48 ± 0.14 mas

Spectrography

Spectral Type: B3 IV/V 1982MSS...C03....0H.

Radial Velocity: 19.50 ±2.80 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: n/a
 


Photometry
 
band magnitude Abs. Mag.
U 3.96 -2.92
B 4.65 -2.23
V 4.83 -2.05
R
I 4.97 -1.91
J 5.23 -1.65
H 5.28 -1.59
K 5.30 -1.57

  B-V: -0.18       V-I: -0.14

Derivations

Heliocentric distance: 237.56 pc (fitted to cluster)

Galactocentric distance: 7,479 pc

Transverse velocity: 14.9 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -76.3 pc -217.7 pc -56.8 pc
Velocity (U, V, W) -17.8 km/s -11.9 km/s -11.9 km/s

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