36 Ophiuchi

light-years
Proper names: 36 Ophiuchi
Catalog numbers:
     Gliese (Gl) 663, Aitken Double Star (ADS) 10417, South & Herschel (SHJ) 243
Heavy element abundance: 76% of Sol
Standard error in heavy element abundance: 15%
Source for heavy element abundance: Strobel [Fe/H] Determinations
Arity: trinary
Right Ascension and Declination: 17h15m20.8s, -26°36'5" (epoch 2000.0)
Distance from Sol: 19.47 light-years (5.968 parsecs)
Standard error in distance: 0.6286%
Source for distance: Hipparcos
Celestial (X,Y,Z) coordinates in ly: -3.370, -17.08, -8.716
Galactic (X,Y,Z) coordinates in ly: 19.34, -0.459, 2.129
Proper motion: 1.235 arcsec/yr (203.6° from north)
Radial Velocity: 0.5 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 0.436, -34.27, -6.782

What do all these fields mean?

Data for A and B's orbit around one other:
Combined absolute visual magnitude: +5.46
Combined visual luminosity: 0.571 x Sol
Period: 548.7 years
Semimajor Axis: 83.02 A.U.s
Eccentricity: 0.9
Periastron distance: 8.302 A.U.s
Apastron distance: 157.7 A.U.s
Year in which periastron occurs: 1643.48
Source for orbit data: P. Brosche
As seen from A:
     At periastron, B would appear as magnitude -20.75
     At apastron, B would appear as magnitude -14.35
As seen from B:
     At periastron, A would appear as magnitude -20.79
     At apastron, A would appear as magnitude -14.39

Data for (A-B) and C's orbit around one other:
Combined absolute visual magnitude: +5.30
Combined visual luminosity: 0.662 x Sol
Observed Separation: 4369 A.U.s
As seen from (A-B):
     C would appear as magnitude -5.92
As seen from C:
     (A-B) would appear as magnitude -7.91


Component A:
Catalog numbers:
     Henry Draper (HD) 155886, Cordoba Durchmusterung (CD) -2612026, Luyten Half-Second (LHS) 437, Hipparcos Input Catalog (HIC) 84405, Smithsonian Astrophysical Observatory (SAO) 185198, Hoffleit Bright Star (HR) 6402
Spectral class: K1e
Luminosity Class: V
Apparent visual magnitude: +5.07
Absolute visual magnitude: +6.19
Visual luminosity: 0.291 x Sol
Color indices: B-V= +0.85, U-B= +0.53
Mass: 0.77 x Sol
Diameter: 0.783 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.539 A.U.s
Orbital period in CZ: 164.843 days
Tidal index in CZ: 4.90954
Angular size of star in sky in CZ: 0.773564 degrees


Component B:
Catalog numbers:
     Henry Draper (HD) 155885, Luyten Half-Second (LHS) 438, Hipparcos Input Catalog (HIC) 84405, Smithsonian Astrophysical Observatory (SAO) 185199, Hoffleit Bright Star (HR) 6401
Right Ascension and Declination: 17h15m20.94s, -26°36'7.2" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: -3.370, -17.08, -8.716
Galactic (X,Y,Z) coordinates in ly: 19.34, -0.459, 2.129
Proper motion: 1.231 arcsec/yr (202.0° from north)
Radial Velocity: 0.9 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: 0.942, -33.97, -7.661
Spectral class: K1e
Luminosity Class: V
Apparent visual magnitude: +5.11
Absolute visual magnitude: +6.23
Visual luminosity: 0.280 x Sol
Color indices: B-V= +0.86, U-B= +0.63
Mass: 0.76 x Sol
Diameter: 0.924 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.529 A.U.s
Orbital period in CZ: 161.402 days
Tidal index in CZ: 5.12112
Angular size of star in sky in CZ: 0.930035 degrees


Component C:
Catalog numbers:
     Henry Draper (HD) 156026, Cordoba Durchmusterung (CD) -2612036, Luyten Half-Second (LHS) 439, Hipparcos Input Catalog (HIC) 84478, Smithsonian Astrophysical Observatory (SAO) 185213, Hoffleit Bright Star (HR) 6401
Right Ascension and Declination: 17h16m13.37s, -26°32'46.3" (epoch 2000.0)
Celestial (X,Y,Z) coordinates in ly: -3.306, -17.10, -8.699
Galactic (X,Y,Z) coordinates in ly: 19.35, -0.405, 2.086
Proper motion: 1.222 arcsec/yr (203.1° from north)
Radial Velocity: -0.1 km/sec
Source for proper motion and radial velocity: Gliese
Galactic (U,V,W) velocity components in km/s: -0.0561, -33.85, -7.003
Spectral class: K5e
Luminosity Class: V
Apparent visual magnitude: +6.33
Absolute visual magnitude: +7.45
Visual luminosity: 0.0911 x Sol
Color indices: B-V= +1.16, U-B= +1.07, R-I= +0.44
Mass: 0.63 x Sol
Diameter: 1.071 x Sol
Source for diameter: Apparent Diameters and Absolute Radii of Stars (Fracassini+ 1988)
Comfort Zone (visual): 0.302 A.U.s
Orbital period in CZ: 76.3179 days
Tidal index in CZ: 22.9049
Angular size of star in sky in CZ: 1.891756 degrees

light-years
but not more than light-years away
Data for this star system were most recently updated on 4-April-2001.