2 Cygni (HIP 95372)

2 Cygni is a blue main-sequence star in the constellation Cygnus. At 839 light years away, it shines at an apparent visual magnitude of 4.99. 2 Cygni is a multiple-star system. The iron abundance of 2 Cygni is 0 (100.0% of the Sun). It is moving through the Galaxy at a speed of 32.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,800 and 27,200 light years from the center of the Galaxy. It will come closest to the Sun 5.6 million years from now when it will brighten to magnitude 4.18 from a distance of 579 light years.

Sky position: RA 19h 24.1m, Dec +29 37.2'

Common designations: 2 Cygni, HIP 95372, HD 182568, HR 7372

Moon Calendar Magnets

Stick to Most Steel Surfaces


Brightest stars in Cygnus:
(list all)

36

|    4.87

)   72 Cygni

37

|    4.89

)   15 Cygni

38

|    4.91

)   Psi Cygni

39

|    4.93

)   28 Cygni

40

|    4.93

)   29 Cygni

41

|    4.93

)   T Cygni

42

|    4.94

)   Ruchba A

43

|    4.95

)   22 Cygni

44

|    4.98

)   HR 7633

45

|    4.99

)   2 Cygni

46

|    5.00

)   17 Cygni

47

|    5.03

)   20 Cygni

48

|    5.04

)   A Cygni

49

|    5.04

)   74 Cygni

50

|    5.06

)   HR 7495

51

|    5.06

)   26 Cygni

52

|    5.06

)   56 Cygni

Location of 2 Cygni circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of 2 Cygni

(compared to the Sun)

Eccentricity: 11.1% vs. 16.0%

Angle φ : -80.9 vs. 26.0

Semi-major axis : 7,508 pc vs. 8,686 pc

Semi-minor axis: 7,461 pc vs. 8,574 pc

Focus-to-center: 834 pc vs. 1,388 pc

Semilatus rectum : 7,415 pc vs. 8,464 pc

Perigalacticon: 6,674 pc vs. 7,297 pc

Apogalacticon: 8,342 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for 2 Cygni
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 291.03154919 0.14 mas 11.20 0.80 mas/yr.
Declination: 29.62131102 0.16 mas 14.60 0.80 mas/yr.
     
Galactic Longitude: 62.90370942 18.12 mas/yr.
Galactic Latitude: 6.62678803 -3.19 mas/yr.

Parallax: 3.87 0.21 mas


Spectrography

Spectral Type: B2.5V 1976A&AS...26..241C.

Radial Velocity: -23.60 2.00 km/s [B rating] 2007AN....328..889K.

Iron Abundance [Fe/H]: 0.00 0.04 dex  2011A&A...525A..71W.
 



Photometry
 
band magnitude Abs. Mag.
U 4.16 -2.89
B 4.87 -2.18
V 4.99 -2.06
R
I 5.07 -1.98
J 5.15 -1.90
H 5.27 -1.78
K 5.28 -1.77

  B-V: -0.12       V-I: -0.08


Derivations

Heliocentric distance: 257.49 pc (5.4% margin of error)

Galactocentric distance: 7,287 pc

Transverse velocity: 22.5 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 116.5 pc 227.7 pc 29.7 pc
Velocity (U, V, W) -30.2 km/s -10.4 km/s -6.6 km/s

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