Rho Cygni (HIP 106481)

Rho Cygni is a yellow giant star in the constellation Cygnus. At 124 light years away, it shines at an apparent visual magnitude of 3.98. The iron abundance of Rho Cygni is -0.15 (70.8% of the Sun). It is moving through the Galaxy at a speed of 18.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,300 and 39,000 light years from the center of the Galaxy.

Sky position: RA 21h 34.0m, Dec +45 35.4'

Common designations: Rho Cygni, 73 Cygni, HIP 106481, HD 205435, HR 8252

Splendors of the Universe

Magnificent Monthly Calendar


Brightest stars in Cygnus:
(list all)

6

|    3.21

)   Zeta Cygni

7

|    3.72

)   Xi Cygni

8

|    3.74

)   Tau Cygni

9

|    3.76

)   Iota Cygni

10

|    3.80

)   Kappa Cygni

11

|    3.80

)   Omicron-1 Cygni

12

|    3.89

)   Eta Cygni

13

|    3.94

)   Nu Cygni

14

|    3.96

)   Omicron-2 Cygni

15

|    3.98

)   Rho Cygni

16

|    4.01

)   41 Cygni

17

|    4.22

)   52 Cygni

18

|    4.22

)   Sigma Cygni

19

|    4.23

)   Pi-2 Cygni

20

|    4.28

)   33 Cygni

21

|    4.41

)   Upsilon Cygni

22

|    4.43

)   39 Cygni

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


Galactic Orbit of Rho Cygni

(compared to the Sun)

Eccentricity: 25.3% vs. 16.0%

Angle φ : 34.0 vs. 26.0

Semi-major axis : 9,561 pc vs. 8,686 pc

Semi-minor axis: 9,250 pc vs. 8,574 pc

Focus-to-center: 2,416 pc vs. 1,388 pc

Semilatus rectum : 8,950 pc vs. 8,464 pc

Perigalacticon: 7,145 pc vs. 7,297 pc

Apogalacticon: 11,976 pc vs. 10,074 pc
 


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

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 323.49530340 0.12 mas -23.83 0.14 mas/yr.
Declination: 45.59206604 0.11 mas -93.73 0.13 mas/yr.
     
Galactic Longitude: 90.74214530 -81.04 mas/yr.
Galactic Latitude: -4.57942773 -52.79 mas/yr.

Parallax: 26.39 0.15 mas


Spectrography

Spectral Type: G8III Fe-0.5 1989ApJS...71..245K.

Radial Velocity: 6.88 0.21 km/s [A rating] 2008A&A...480...91S, 2006AstL...32..759G.

Iron Abundance [Fe/H]: -0.15 dex  2011A&A...525A..71W, 2008A&A...480...91S, 2007A&A...475.1003H, 1991ApJS...75..579L, 1990ApJS...74.1075M.
 



Photometry
 
band magnitude Abs. Mag.
U
B 4.87 1.97
V 3.98 1.09
R
I 3.15 0.26
J 2.49 -0.41
H 2.01 -0.88
K 1.90 -0.99

  B-V: +0.89       V-I: +0.83


Derivations

Heliocentric distance: 37.89 pc (0.6% margin of error)

Galactocentric distance: 7,401 pc

Transverse velocity: 17.4 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) -0.5 pc 37.8 pc -3.0 pc
Velocity (U, V, W) 14.5 km/s 6.3 km/s -10.0 km/s

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