Double Star Calculator - Orbit

Orbital Elements for STF42AB
WDS: STF42AB WDS ID/Discoverer
P: 1900.000 Orbital period (years)
a: 4.5 Semi-major axis (arcseconds)
i: 155.0 Inclination (degrees)
Ω: 23.0 Longitude of ascending node (degrees)
T: 1384.000 Epoch of periastron passage (year)
e: 0.53 Eccentricity
ω: 206.0 Longitude of periastron (degrees)
Start-Year: 1075.0 Year
End-Year: 2975.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF42AB
Position: 003602.39+295934.2 Epoch-2000 right ascension and declination
WDS-ID: 00360+2959 WDS designation
Discoverer Code: STF42AB Discover designation and components
ADS number: 497 Aitken Double Star catalog
HD number: 3266 HD catalog number
Hipparcos number: 2844 Hipparcos catalog number
V1: 8.39 Magnitude of the primary
V2: 9.05 Magnitude of the secondary
Equinox: Equinox
Date: 2000 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: Kis2009 Reference

Double Star Orbit for STF42AB



WDS 6th Orbit including measures of STF42AB

-- 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 STF42AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    6.348    19.62
--------------------------
1075.00    4.041   298.60
1085.00    3.966   296.76
1095.00    3.891   294.85
1105.00    3.815   292.86
1115.00    3.739   290.79
1125.00    3.663   288.64
1135.00    3.587   286.39
1145.00    3.510   284.05
1155.00    3.434   281.61
1165.00    3.358   279.05
1175.00    3.282   276.37
1185.00    3.207   273.57
1195.00    3.132   270.64
1205.00    3.058   267.56
1215.00    2.985   264.33
1225.00    2.913   260.93
1235.00    2.842   257.37
1245.00    2.773   253.63
1255.00    2.705   249.70
1265.00    2.639   245.57
1275.00    2.576   241.23
1285.00    2.514   236.68
1295.00    2.455   231.90
1305.00    2.398   226.89
1315.00    2.344   221.64
1325.00    2.293   216.15
1335.00    2.246   210.42
1345.00    2.202   204.46
1355.00    2.162   198.26
1365.00    2.128   191.85
1375.00    2.099   185.24
1385.00    2.077   178.47
1395.00    2.062   171.58
1405.00    2.056   164.62
1415.00    2.060   157.65
1425.00    2.074   150.75
1435.00    2.099   143.97
1445.00    2.134   137.38
1455.00    2.179   131.03
1465.00    2.234   124.97
1475.00    2.297   119.22
1485.00    2.368   113.79
1495.00    2.446   108.70
1505.00    2.530   103.94
1515.00    2.618    99.48
1525.00    2.710    95.33
1535.00    2.805    91.45
1545.00    2.903    87.83
1555.00    3.002    84.44
1565.00    3.102    81.27
1575.00    3.202    78.31
1585.00    3.303    75.52
1595.00    3.403    72.89
1605.00    3.503    70.42
1615.00    3.602    68.08
1625.00    3.701    65.87
1635.00    3.798    63.77
1645.00    3.894    61.78
1655.00    3.989    59.88
1665.00    4.082    58.07
1675.00    4.174    56.34
1685.00    4.264    54.68
1695.00    4.353    53.09
1705.00    4.440    51.57
1715.00    4.525    50.10
1725.00    4.609    48.69
1735.00    4.691    47.32
1745.00    4.771    46.01
1755.00    4.850    44.73
1765.00    4.927    43.50
1775.00    5.002    42.30
1785.00    5.075    41.14
1795.00    5.147    40.01
1805.00    5.217    38.91
1815.00    5.285    37.84
1825.00    5.351    36.80
1835.00    5.416    35.78
1845.00    5.479    34.79
1855.00    5.541    33.82
1865.00    5.600    32.87
1875.00    5.658    31.94
1885.00    5.715    31.03
1895.00    5.770    30.13
1905.00    5.823    29.25
1915.00    5.875    28.39
1925.00    5.925    27.55
1935.00    5.974    26.71
1945.00    6.021    25.89
1955.00    6.066    25.09
1965.00    6.110    24.29
1975.00    6.153    23.51
1985.00    6.194    22.73
1995.00    6.233    21.97
2005.00    6.271    21.21
2015.00    6.308    20.47
2025.00    6.343    19.73
2035.00    6.377    19.00
2045.00    6.409    18.28
2055.00    6.440    17.57
2065.00    6.469    16.86
2075.00    6.497    16.16
2085.00    6.524    15.46
2095.00    6.549    14.77
2105.00    6.573    14.09
2115.00    6.596    13.41
2125.00    6.617    12.73
2135.00    6.637    12.06
2145.00    6.656    11.39
2155.00    6.673    10.73
2165.00    6.689    10.07
2175.00    6.704     9.41
2185.00    6.717     8.76
2195.00    6.729     8.10
2205.00    6.740     7.45
2215.00    6.749     6.80
2225.00    6.757     6.16
2235.00    6.764     5.51
2245.00    6.770     4.87
2255.00    6.774     4.23
2265.00    6.778     3.58
2275.00    6.779     2.94
2285.00    6.780     2.30
2295.00    6.780     1.66
2305.00    6.778     1.02
2315.00    6.775     0.38
2325.00    6.771   359.73
2335.00    6.765   359.09
2345.00    6.759   358.44
2355.00    6.751   357.80
2365.00    6.742   357.15
2375.00    6.731   356.50
2385.00    6.720   355.85
2395.00    6.707   355.19
2405.00    6.694   354.54
2415.00    6.679   353.88
2425.00    6.662   353.21
2435.00    6.645   352.55
2445.00    6.626   351.88
2455.00    6.607   351.21
2465.00    6.586   350.53
2475.00    6.564   349.85
2485.00    6.541   349.16
2495.00    6.516   348.47
2505.00    6.491   347.77
2515.00    6.464   347.07
2525.00    6.436   346.36
2535.00    6.407   345.64
2545.00    6.377   344.92
2555.00    6.345   344.19
2565.00    6.313   343.46
2575.00    6.279   342.71
2585.00    6.245   341.96
2595.00    6.209   341.20
2605.00    6.172   340.43
2615.00    6.133   339.65
2625.00    6.094   338.86
2635.00    6.053   338.06
2645.00    6.012   337.25
2655.00    5.969   336.43
2665.00    5.925   335.60
2675.00    5.880   334.75
2685.00    5.834   333.89
2695.00    5.787   333.02
2705.00    5.738   332.13
2715.00    5.689   331.23
2725.00    5.638   330.31
2735.00    5.586   329.37
2745.00    5.533   328.42
2755.00    5.480   327.44
2765.00    5.425   326.45
2775.00    5.368   325.44
2785.00    5.311   324.41
2795.00    5.253   323.35
2805.00    5.194   322.27
2815.00    5.133   321.16
2825.00    5.072   320.03
2835.00    5.010   318.87
2845.00    4.946   317.68
2855.00    4.882   316.46
2865.00    4.816   315.20
2875.00    4.750   313.92
2885.00    4.683   312.59
2895.00    4.615   311.23
2905.00    4.546   309.82
2915.00    4.476   308.37
2925.00    4.405   306.87
2935.00    4.334   305.33
2945.00    4.261   303.73
2955.00    4.188   302.08
2965.00    4.115   300.37






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 14:41:32



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