30 Ophiuchi (HIP 83262)

30 Ophiuchi is an orange giant star in the constellation Ophiuchus. At 404 light years away, it shines at an apparent visual magnitude of 4.82. 30 Ophiuchi is the primary component of a multiple-star system. The iron abundance of 30 Ophiuchi is -0.03 (93.3% of the Sun). It is moving through the Galaxy at a speed of 51.6 km/s relative to the Sun. Its projected Galactic orbit carries it between 12,100 and 24,200 light years from the center of the Galaxy.

Sky position: RA 17h 1.1m, Dec -4° 13.2'

Common designations: 30 Ophiuchi, HIP 83262, HD 153687, HR 6318

Moon Calendar Poster

Outstanding Lunar Images

Brightest stars in Ophiuchus:
(list all)

27

|    4.57

)   Rho Ophiuchi

28

|    4.58

)   Mu Ophiuchi

29

|    4.62

)   Upsilon Ophiuchi

30

|    4.64

)   20 Ophiuchi

31

|    4.64

)   71 Ophiuchi

32

|    4.72

)   41 Ophiuchi

33

|    4.77

)   Tau Ophiuchi

34

|    4.78

)   51 Ophiuchi

35

|    4.79

)   66 Ophiuchi

36

|    4.82

)   30 Ophiuchi

37

|    4.85

)   74 Ophiuchi

38

|    4.86

)   58 Ophiuchi

39

|    4.91

)   24 Scorpii

40

|    5.03

)   e Ophiuchi

41

|    5.14

)   Omicron Ophiuchi A

42

|    5.23

)   23 Ophiuchi

43

|    5.24

)   HR 6128

Location of 30 Ophiuchi circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.

Galactic Orbit of 30 Ophiuchi
(compared to the Sun)

Eccentricity: 33.3% vs. 16.0%

Angle φ : 165.1° vs. 26.0°

Semi-major axis : 5,559 pc vs. 8,686 pc

Semi-minor axis: 5,241 pc vs. 8,574 pc

Focus-to-center: 1,854 pc vs. 1,388 pc

Semilatus rectum : 4,941 pc vs. 8,464 pc

Perigalacticon: 3,705 pc vs. 7,297 pc

Apogalacticon: 7,413 pc vs. 10,074 pc
 
Some Tabulated XHIP Data for 30 Ophiuchi
(see also: SIMBAD)

Astrometry
 2007A&A...474..653V
  Position Proper Motion
Right Ascension: 255.26510643° ±0.28 mas -40.40 ±0.50 mas/yr.
Declination: -4.22245418° ±0.15 mas -77.20 ±0.50 mas/yr.
     
Galactic Longitude: 15.57964615° -86.92 mas/yr.
Galactic Latitude: 22.18249393° -6.03 mas/yr.

Parallax: 8.05 ± 0.33 mas

Spectrography

Spectral Type: K4 III 1999MSS...C05....0H.

Radial Velocity: -6.70 ±0.80 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: -0.03 dex  1990ApJS...74.1075M.
 


Photometry
 
band magnitude Abs. Mag.
U
B 6.30 0.84
V 4.82 -0.65
R
I 3.50 -1.97
J 2.11 -3.35
H 1.43 -4.03
K 1.27 -4.20

  B-V: +1.48       V-I: +1.32

Derivations

Heliocentric distance: 123.97 pc (4.1% margin of error)

Galactocentric distance: 7,290 pc

Transverse velocity: 51.2 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 110.6 pc 30.8 pc 46.8 pc
Velocity (U, V, W) 9.0 km/s -50.5 km/s -5.8 km/s

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