Double Star Calculator - Orbit

Orbital Elements for STF2807
WDS: STF2807 WDS ID/Discoverer
P: 2818.985 Orbital period (years)
a: 6.15221 Semi-major axis (arcseconds)
i: 91.733 Inclination (degrees)
Ω: 136.406 Longitude of ascending node (degrees)
T: 1641.022 Epoch of periastron passage (year)
e: 0.80384 Eccentricity
ω: 108.438 Longitude of periastron (degrees)
Start-Year: 615.5073 Year
End-Year: 3434.4927 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2807
Position: 211733.47+823103.7 Epoch-2000 right ascension and declination
WDS-ID: 21176+8231 WDS designation
Discoverer Code: STF2807 Discover designation and components
ADS number: 14921 Aitken Double Star catalog
HD number: 204372 HD catalog number
Hipparcos number: 105112 Hipparcos catalog number
V1: 8.65 Magnitude of the primary
V2: 8.77 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF2807



WDS 6th Orbit including measures of STF2807

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --


Legend:
Green plus signs:Visual (micrometric) measures
Violet asterisks:Photographic measures
Blue symbols:Various interferometric techniques
Dot-dash line:Indicates the line of nodes

Ephemeris of STF2807
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.732   310.03
--------------------------
615.51    4.907   139.70
625.51    4.935   139.66
635.51    4.963   139.63
645.51    4.989   139.59
655.51    5.016   139.56
665.51    5.042   139.52
675.51    5.067   139.49
685.51    5.092   139.46
695.51    5.116   139.42
705.51    5.140   139.39
715.51    5.163   139.36
725.51    5.186   139.32
735.51    5.208   139.29
745.51    5.229   139.26
755.51    5.250   139.23
765.51    5.271   139.20
775.51    5.290   139.17
785.51    5.309   139.14
795.51    5.328   139.10
805.51    5.346   139.07
815.51    5.363   139.04
825.51    5.379   139.01
835.51    5.395   138.98
845.51    5.410   138.95
855.51    5.425   138.92
865.51    5.438   138.90
875.51    5.451   138.87
885.51    5.464   138.84
895.51    5.475   138.81
905.51    5.486   138.78
915.51    5.496   138.75
925.51    5.505   138.72
935.51    5.513   138.69
945.51    5.520   138.66
955.51    5.527   138.64
965.51    5.533   138.61
975.51    5.537   138.58
985.51    5.541   138.55
995.51    5.544   138.52
1005.51    5.546   138.49
1015.51    5.547   138.47
1025.51    5.547   138.44
1035.51    5.546   138.41
1045.51    5.544   138.38
1055.51    5.541   138.35
1065.51    5.537   138.32
1075.51    5.532   138.30
1085.51    5.525   138.27
1095.51    5.517   138.24
1105.51    5.508   138.21
1115.51    5.498   138.18
1125.51    5.486   138.15
1135.51    5.474   138.12
1145.51    5.459   138.09
1155.51    5.444   138.06
1165.51    5.426   138.04
1175.51    5.408   138.01
1185.51    5.387   137.98
1195.51    5.366   137.95
1205.51    5.342   137.92
1215.51    5.317   137.88
1225.51    5.290   137.85
1235.51    5.261   137.82
1245.51    5.230   137.79
1255.51    5.197   137.76
1265.51    5.162   137.73
1275.51    5.124   137.69
1285.51    5.085   137.66
1295.51    5.043   137.63
1305.51    4.999   137.59
1315.51    4.952   137.56
1325.51    4.902   137.52
1335.51    4.850   137.48
1345.51    4.794   137.45
1355.51    4.735   137.41
1365.51    4.673   137.37
1375.51    4.608   137.33
1385.51    4.538   137.29
1395.51    4.465   137.24
1405.51    4.387   137.20
1415.51    4.305   137.15
1425.51    4.218   137.11
1435.51    4.126   137.06
1445.51    4.029   137.00
1455.51    3.925   136.95
1465.51    3.815   136.89
1475.51    3.697   136.83
1485.51    3.572   136.76
1495.51    3.439   136.69
1505.51    3.296   136.62
1515.51    3.142   136.53
1525.51    2.977   136.44
1535.51    2.799   136.34
1545.51    2.606   136.22
1555.51    2.397   136.08
1565.51    2.168   135.91
1575.51    1.918   135.70
1585.51    1.642   135.43
1595.51    1.338   135.03
1605.51    1.004   134.39
1615.51    0.638   133.04
1625.51    0.247   127.56
1635.51    0.165   329.16
1645.51    0.557   319.76
1655.51    0.916   318.08
1665.51    1.225   317.31
1675.51    1.480   316.83
1685.51    1.688   316.48
1695.51    1.855   316.21
1705.51    1.989   315.97
1715.51    2.097   315.76
1725.51    2.183   315.57
1735.51    2.250   315.40
1745.51    2.303   315.23
1755.51    2.344   315.07
1765.51    2.374   314.91
1775.51    2.396   314.76
1785.51    2.409   314.61
1795.51    2.416   314.46
1805.51    2.417   314.31
1815.51    2.413   314.16
1825.51    2.404   314.01
1835.51    2.392   313.86
1845.51    2.375   313.71
1855.51    2.356   313.55
1865.51    2.334   313.40
1875.51    2.309   313.23
1885.51    2.281   313.07
1895.51    2.252   312.90
1905.51    2.220   312.73
1915.51    2.187   312.55
1925.51    2.152   312.36
1935.51    2.115   312.17
1945.51    2.077   311.97
1955.51    2.038   311.77
1965.51    1.998   311.55
1975.51    1.957   311.33
1985.51    1.914   311.10
1995.51    1.871   310.86
2005.51    1.827   310.60
2015.51    1.782   310.33
2025.51    1.736   310.05
2035.51    1.690   309.76
2045.51    1.643   309.44
2055.51    1.595   309.11
2065.51    1.547   308.76
2075.51    1.499   308.39
2085.51    1.450   307.99
2095.51    1.401   307.56
2105.51    1.351   307.10
2115.51    1.301   306.60
2125.51    1.251   306.07
2135.51    1.201   305.49
2145.51    1.150   304.86
2155.51    1.100   304.17
2165.51    1.049   303.42
2175.51    0.998   302.59
2185.51    0.947   301.67
2195.51    0.896   300.65
2205.51    0.846   299.50
2215.51    0.795   298.21
2225.51    0.745   296.74
2235.51    0.695   295.06
2245.51    0.646   293.13
2255.51    0.598   290.87
2265.51    0.550   288.23
2275.51    0.504   285.09
2285.51    0.460   281.34
2295.51    0.417   276.80
2305.51    0.378   271.29
2315.51    0.344   264.59
2325.51    0.314   256.51
2335.51    0.293   247.02
2345.51    0.280   236.34
2355.51    0.278   225.07
2365.51    0.286   214.05
2375.51    0.304   203.99
2385.51    0.330   195.29
2395.51    0.363   188.01
2405.51    0.400   182.00
2415.51    0.441   177.07
2425.51    0.485   173.00
2435.51    0.530   169.61
2445.51    0.577   166.77
2455.51    0.625   164.36
2465.51    0.674   162.30
2475.51    0.724   160.52
2485.51    0.774   158.97
2495.51    0.825   157.61
2505.51    0.876   156.40
2515.51    0.927   155.33
2525.51    0.979   154.37
2535.51    1.030   153.51
2545.51    1.082   152.73
2555.51    1.134   152.02
2565.51    1.185   151.38
2575.51    1.237   150.78
2585.51    1.289   150.24
2595.51    1.340   149.73
2605.51    1.392   149.27
2615.51    1.444   148.83
2625.51    1.495   148.43
2635.51    1.546   148.06
2645.51    1.598   147.70
2655.51    1.649   147.37
2665.51    1.700   147.06
2675.51    1.751   146.77
2685.51    1.802   146.50
2695.51    1.853   146.24
2705.51    1.903   145.99
2715.51    1.954   145.75
2725.51    2.004   145.53
2735.51    2.054   145.32
2745.51    2.104   145.12
2755.51    2.154   144.93
2765.51    2.203   144.74
2775.51    2.253   144.57
2785.51    2.302   144.40
2795.51    2.351   144.24
2805.51    2.400   144.09
2815.51    2.448   143.94
2825.51    2.497   143.80
2835.51    2.545   143.66
2845.51    2.593   143.53
2855.51    2.641   143.40
2865.51    2.688   143.28
2875.51    2.736   143.16
2885.51    2.783   143.05
2895.51    2.830   142.94
2905.51    2.876   142.83
2915.51    2.923   142.73
2925.51    2.969   142.63
2935.51    3.015   142.53
2945.51    3.061   142.43
2955.51    3.106   142.34
2965.51    3.151   142.25
2975.51    3.196   142.17
2985.51    3.241   142.08
2995.51    3.285   142.00
3005.51    3.329   141.92
3015.51    3.373   141.85
3025.51    3.417   141.77
3035.51    3.460   141.70
3045.51    3.503   141.62
3055.51    3.546   141.55
3065.51    3.588   141.49
3075.51    3.630   141.42
3085.51    3.672   141.35
3095.51    3.713   141.29
3105.51    3.755   141.23
3115.51    3.795   141.17
3125.51    3.836   141.11
3135.51    3.876   141.05
3145.51    3.916   140.99
3155.51    3.956   140.94
3165.51    3.995   140.88
3175.51    4.034   140.83
3185.51    4.072   140.77
3195.51    4.110   140.72
3205.51    4.148   140.67
3215.51    4.186   140.62
3225.51    4.223   140.57
3235.51    4.260   140.52
3245.51    4.296   140.48
3255.51    4.332   140.43
3265.51    4.368   140.38
3275.51    4.403   140.34
3285.51    4.438   140.29
3295.51    4.472   140.25
3305.51    4.506   140.21
3315.51    4.540   140.16
3325.51    4.573   140.12
3335.51    4.606   140.08
3345.51    4.638   140.04
3355.51    4.670   140.00
3365.51    4.702   139.96
3375.51    4.733   139.92
3385.51    4.764   139.88
3395.51    4.794   139.84
3405.51    4.824   139.81
3415.51    4.853   139.77
3425.51    4.882   139.73






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.


Acknowledgements
The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.


Report Information
Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 18:24:42



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