Procyon (HIP 37279)

Procyon is a white subgiant star in the constellation Canis Minor. At 11.4 light years away, it is the 8th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 0.40. Procyon is a multiple-star system. The star's age is estimated to be 1.7 billion years but is certainly no less than 1.6 billion years and no greater than 1.8 billion years. The iron abundance of Procyon is -0.02 (95.5% of the Sun). It is moving through the Galaxy at a speed of 21 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,100 and 28,400 light years from the center of the Galaxy.

Sky position: RA 7h 39.3m, Dec +5 13.8'

Common designations: Procyon, Alpha Canis Minoris, 10 Canis Minoris, HIP 37279, HD 61421, Gliese 280 A

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Brightest stars in Canis Minor:
(list all)

1

|    0.40

)   Procyon

2

|    2.89

)   Gomeisa

3

|    4.33

)   Gamma Canis Minoris

4

|    4.39

)   G Canis Minoris

5

|    4.55

)   6 Canis Minoris

6

|    4.99

)   Epsilon Canis Minoris

7

|    5.12

)   Zeta Canis Minoris

8

|    5.22

)   Eta Canis Minoris

9

|    5.24

)   Delta-1 Canis Minoris

10

|    5.25

)   11 Canis Minoris

11

|    5.30

)   14 Canis Minoris

12

|    5.36

)   HR 2729

13

|    5.37

)   1 Canis Minoris

14

|    5.59

)   Delta-2 Canis Minoris

15

|    5.65

)   HR 3136

16

|    5.71

)   HR 2728

17

|    5.74

)   HR 2682

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


Galactic Orbit of Procyon

(compared to the Sun)

Eccentricity: 10.4% vs. 16.0%

Angle φ : 58.2 vs. 26.0

Semi-major axis : 7,896 pc vs. 8,686 pc

Semi-minor axis: 7,853 pc vs. 8,574 pc

Focus-to-center: 824 pc vs. 1,388 pc

Semilatus rectum : 7,810 pc vs. 8,464 pc

Perigalacticon: 7,073 pc vs. 7,297 pc

Apogalacticon: 8,720 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Procyon
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 114.82724194 0.82 mas -716.57 0.88 mas/yr.
Declination: 5.22750767 0.50 mas -1,034.58 0.38 mas/yr.
     
Galactic Longitude: 213.70072321 602.92 mas/yr.
Galactic Latitude: 13.02207808 -1,104.68 mas/yr.

Parallax: 285.93 0.88 mas


Spectrography

Spectral Type: F5IV-V 2003AJ....126.2048G.

Radial Velocity: -2.70 1.01 km/s [D rating] 2005ApJS..159..141V.
This star is a spectroscopic binary with an unsolved orbit.

Iron Abundance [Fe/H]: -0.02 dex  2009A&A...501..941H, 2008A&A...492..823B, 2007A&A...465..271R, 2006ApJ...652.1604B, 2006AJ....131.3069L, 2005PASJ...57...27T, 2005ApJS..161..444T, 2005ApJS..159..141V, 2005AJ....129.1063L, 2004A&A...425..187T, 2004A&A...420..183A, 2003AJ....126.2015H, 2000ApJ...530..939C, 2000A&A...364..249M, 2000A&A...362.1077Z, 1999ApJ...521..753T, 1999A&A...343..519M, 1998A&A...338..161F, 1997A&A...323..909F, 1996A&A...314..191G, 1994A&A...281..775N, 1993A&A...275..101E, 1984Msngr..38...33E.
 



Photometry
 
band magnitude Abs. Mag.
U
B 0.83 3.11
V 0.40 2.68
R 0.70 2.98
I 0.90 3.18
J -0.50 1.78
H -0.67 1.62
K -0.66 1.62

  B-V: +0.43       V-I: -0.50


Derivations

Heliocentric distance: 3.50 pc (0.3% margin of error)

Galactocentric distance: 7,403 pc

Transverse velocity: 20.9 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -2.8 pc -1.9 pc 0.8 pc
Velocity (U, V, W) 4.3 km/s -9.1 km/s -18.5 km/s

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