109 Herculis (HIP 90139)

109 Herculis is an orange giant star in the constellation Hercules. At 119 light years away, it is the 440th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 3.85. 109 Herculis is the primary component of a multiple-star system. The iron abundance of 109 Herculis is -0.06 (87.1% of the Sun). It is moving through the Galaxy at a speed of 79.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 14,900 and 24,100 light years from the center of the Galaxy. It will come closest to the Sun 328,000 years from now when it will brighten to magnitude 3.02 from a distance of 81 light years.

Sky position: RA 18h 23.7m, Dec +21° 46.2'

Common designations: 109 Herculis, HIP 90139, HD 169414, HR 6895

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Brightest stars in Hercules:
(list all)

3

|    2.81

)   Zeta Herculis

4

|    3.12

)   Sarin

5

|    3.16

)   Pi Herculis

6

|    3.42

)   Mu Herculis

7

|    3.48

)   Eta Herculis

8

|    3.70

)   Xi Herculis

9

|    3.74

)   Gamma Herculis

10

|    3.82

)   Iota Herculis

11

|    3.84

)   Omicron Herculis

12

|    3.85

)   109 Herculis

13

|    3.86

)   Theta Herculis

14

|    3.91

)   Tau Herculis

15

|    3.92

)   Epsilon Herculis

16

|    4.15

)   Rho Herculis

17

|    4.19

)   110 Herculis

18

|    4.20

)   Sigma Herculis

19

|    4.23

)   Phi Herculis

Location of 109 Herculis circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.

Galactic Orbit of 109 Herculis
(compared to the Sun)

Eccentricity: 23.6% vs. 16.0%

Angle φ : 175.4° vs. 26.0°

Semi-major axis : 5,974 pc vs. 8,686 pc

Semi-minor axis: 5,805 pc vs. 8,574 pc

Focus-to-center: 1,410 pc vs. 1,388 pc

Semilatus rectum : 5,641 pc vs. 8,464 pc

Perigalacticon: 4,564 pc vs. 7,297 pc

Apogalacticon: 7,385 pc vs. 10,074 pc
 
Some Tabulated XHIP Data for 109 Herculis
(see also: SIMBAD)

Astrometry
 2007A&A...474..653V
  Position Proper Motion
Right Ascension: 275.92402824° ±0.24 mas 197.30 ±0.30 mas/yr.
Declination: 21.77034241° ±0.25 mas -243.50 ±0.30 mas/yr.
     
Galactic Longitude: 49.76716492° -144.77 mas/yr.
Galactic Latitude: 15.60005785° -277.96 mas/yr.

Parallax: 27.42 ± 0.40 mas

Spectrography

Spectral Type: K2IIIab 1989ApJS...71..245K.

Radial Velocity: -58.16 ±0.07 km/s [A rating] 2005A&A...430..165F.

Iron Abundance [Fe/H]: -0.06 dex  2011A&A...525A..71W, 2007A&A...475.1003H, 1990ApJS...74.1075M.
 


Photometry
 
band magnitude Abs. Mag.
U
B 5.02 2.21
V 3.85 1.04
R 3.10 0.29
I 2.60 -0.21
J 2.07 -0.74
H 1.38 -1.43
K 1.31 -1.50

  B-V: +1.17       V-I: +1.25

Derivations

Heliocentric distance: 36.46 pc (1.5% margin of error)

Galactocentric distance: 7,377 pc

Transverse velocity: 54.2 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 22.7 pc 26.8 pc 9.8 pc
Velocity (U, V, W) -8.7 km/s -49.1 km/s -61.9 km/s

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