Double Star Calculator - Orbit

Orbital Elements for STF1187AB
WDS: STF1187AB WDS ID/Discoverer
P: 1385.156 Orbital period (years)
a: 3.0464 Semi-major axis (arcseconds)
i: 127.8 Inclination (degrees)
Ω: 17.6 Longitude of ascending node (degrees)
T: 3132.316 Epoch of periastron passage (year)
e: 0.2414 Eccentricity
ω: 258.1 Longitude of periastron (degrees)
Start-Year: 1332.422 Year
End-Year: 2717.578 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1187AB
Position: 080930.45+321318.8 Epoch-2000 right ascension and declination
WDS-ID: 08095+3213 WDS designation
Discoverer Code: STF1187AB Discover designation and components
ADS number: 6623 Aitken Double Star catalog
HD number: 67501 HD catalog number
Hipparcos number: 39948 Hipparcos catalog number
V1: 7.19 Magnitude of the primary
V2: 7.98 Magnitude of the secondary
Equinox: Equinox
Date: 1997 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Ole2001 Reference

Double Star Orbit for STF1187AB



WDS 6th Orbit including measures of STF1187AB

-- 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 STF1187AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    3.000    18.49
--------------------------
1332.42    2.643   236.86
1342.42    2.669   234.83
1352.42    2.695   232.84
1362.42    2.719   230.88
1372.42    2.742   228.96
1382.42    2.764   227.06
1392.42    2.784   225.20
1402.42    2.803   223.36
1412.42    2.819   221.55
1422.42    2.833   219.75
1432.42    2.844   217.97
1442.42    2.853   216.20
1452.42    2.859   214.44
1462.42    2.862   212.69
1472.42    2.861   210.94
1482.42    2.856   209.18
1492.42    2.848   207.42
1502.42    2.836   205.65
1512.42    2.820   203.85
1522.42    2.800   202.04
1532.42    2.775   200.19
1542.42    2.745   198.31
1552.42    2.711   196.38
1562.42    2.672   194.40
1572.42    2.628   192.36
1582.42    2.579   190.24
1592.42    2.526   188.04
1602.42    2.468   185.74
1612.42    2.406   183.32
1622.42    2.339   180.77
1632.42    2.268   178.07
1642.42    2.195   175.19
1652.42    2.118   172.10
1662.42    2.039   168.78
1672.42    1.960   165.19
1682.42    1.880   161.30
1692.42    1.801   157.06
1702.42    1.725   152.44
1712.42    1.653   147.41
1722.42    1.588   141.94
1732.42    1.531   136.03
1742.42    1.484   129.70
1752.42    1.449   123.02
1762.42    1.428   116.07
1772.42    1.422   108.99
1782.42    1.431   101.93
1792.42    1.454    95.02
1802.42    1.492    88.40
1812.42    1.541    82.16
1822.42    1.601    76.34
1832.42    1.670    70.97
1842.42    1.744    66.04
1852.42    1.824    61.53
1862.42    1.906    57.40
1872.42    1.991    53.62
1882.42    2.075    50.14
1892.42    2.160    46.94
1902.42    2.243    43.98
1912.42    2.324    41.23
1922.42    2.402    38.66
1932.42    2.478    36.25
1942.42    2.550    33.98
1952.42    2.619    31.83
1962.42    2.683    29.79
1972.42    2.744    27.85
1982.42    2.801    25.98
1992.42    2.853    24.18
2002.42    2.901    22.45
2012.42    2.945    20.77
2022.42    2.985    19.14
2032.42    3.020    17.55
2042.42    3.052    15.99
2052.42    3.079    14.47
2062.42    3.103    12.97
2072.42    3.122    11.48
2082.42    3.138    10.02
2092.42    3.150     8.57
2102.42    3.159     7.13
2112.42    3.165     5.69
2122.42    3.167     4.26
2132.42    3.166     2.83
2142.42    3.162     1.40
2152.42    3.155   359.96
2162.42    3.145   358.52
2172.42    3.133   357.06
2182.42    3.118   355.59
2192.42    3.101   354.11
2202.42    3.082   352.61
2212.42    3.061   351.09
2222.42    3.038   349.54
2232.42    3.014   347.98
2242.42    2.987   346.38
2252.42    2.960   344.76
2262.42    2.931   343.11
2272.42    2.901   341.42
2282.42    2.870   339.70
2292.42    2.838   337.94
2302.42    2.806   336.14
2312.42    2.774   334.29
2322.42    2.741   332.41
2332.42    2.708   330.47
2342.42    2.675   328.49
2352.42    2.643   326.46
2362.42    2.611   324.38
2372.42    2.579   322.25
2382.42    2.549   320.07
2392.42    2.519   317.84
2402.42    2.491   315.55
2412.42    2.464   313.21
2422.42    2.438   310.82
2432.42    2.415   308.39
2442.42    2.393   305.90
2452.42    2.373   303.38
2462.42    2.355   300.81
2472.42    2.340   298.20
2482.42    2.326   295.57
2492.42    2.316   292.90
2502.42    2.308   290.22
2512.42    2.302   287.52
2522.42    2.299   284.81
2532.42    2.299   282.09
2542.42    2.301   279.38
2552.42    2.306   276.67
2562.42    2.313   273.98
2572.42    2.323   271.31
2582.42    2.335   268.67
2592.42    2.349   266.05
2602.42    2.366   263.47
2612.42    2.384   260.93
2622.42    2.404   258.42
2632.42    2.425   255.96
2642.42    2.448   253.55
2652.42    2.473   251.18
2662.42    2.498   248.85
2672.42    2.523   246.58
2682.42    2.550   244.35
2692.42    2.576   242.16
2702.42    2.603   240.02
2712.42    2.630   237.93






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.


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Double Star Calculator: Version 1.2 ($Rev: 2397 $)
Report created: 2026-06-25 16:04:53



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