Double Star Calculator - Orbit

Orbital Elements for STF1821AB
WDS: STF1821AB WDS ID/Discoverer
P: 10141.555 Orbital period (years)
a: 30.24041 Semi-major axis (arcseconds)
i: 93.267 Inclination (degrees)
Ω: 51.244 Longitude of ascending node (degrees)
T: 2902.040 Epoch of periastron passage (year)
e: 0.68651 Eccentricity
ω: 242.039 Longitude of periastron (degrees)
Start-Year: -3045.7773500000003 Year
End-Year: 7095.77735 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1821AB
Position: 141329.00+514723.8 Epoch-2000 right ascension and declination
WDS-ID: 14135+5147 WDS designation
Discoverer Code: STF1821AB Discover designation and components
ADS number: 9173 Aitken Double Star catalog
HD number: 124675 HD catalog number
Hipparcos number: 69483 Hipparcos catalog number
V1: 4.53 Magnitude of the primary
V2: 6.62 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: n Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF1821AB



WDS 6th Orbit including measures of STF1821AB

-- 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 STF1821AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50   13.683   235.44
--------------------------
-3045.78   29.455    46.76
-2945.78   28.926    46.61
-2845.78   28.373    46.44
-2745.78   27.797    46.27
-2645.78   27.198    46.09
-2545.78   26.577    45.91
-2445.78   25.935    45.71
-2345.78   25.272    45.51
-2245.78   24.589    45.29
-2145.78   23.887    45.06
-2045.78   23.167    44.82
-1945.78   22.428    44.56
-1845.78   21.672    44.28
-1745.78   20.898    43.99
-1645.78   20.109    43.67
-1545.78   19.303    43.32
-1445.78   18.483    42.94
-1345.78   17.648    42.53
-1245.78   16.798    42.08
-1145.78   15.936    41.58
-1045.78   15.061    41.01
-945.78   14.174    40.38
-845.78   13.277    39.67
-745.78   12.369    38.85
-645.78   11.453    37.90
-545.78   10.529    36.79
-445.78    9.599    35.46
-345.78    8.665    33.84
-245.78    7.731    31.83
-145.78    6.800    29.27
-45.78    5.880    25.91
54.22    4.980    21.31
154.22    4.119    14.74
254.22    3.335     4.90
354.22    2.700   349.79
454.22    2.344   328.03
554.22    2.396   303.32
654.22    2.833   283.09
754.22    3.512   269.44
854.22    4.316   260.53
954.22    5.183   254.51
1054.22    6.078   250.24
1154.22    6.984   247.07
1254.22    7.888   244.63
1354.22    8.779   242.69
1454.22    9.649   241.10
1554.22   10.490   239.77
1654.22   11.290   238.64
1754.22   12.038   237.65
1854.22   12.720   236.77
1954.22   13.317   235.98
2054.22   13.806   235.25
2154.22   14.154   234.56
2254.22   14.320   233.90
2354.22   14.243   233.24
2454.22   13.840   232.56
2554.22   12.992   231.82
2654.22   11.544   230.93
2754.22    9.320   229.70
2854.22    6.223   227.42
2954.22    2.437   218.70
3054.22    1.835    69.73
3154.22    5.743    57.03
3254.22    9.335    54.55
3354.22   12.516    53.40
3454.22   15.307    52.70
3554.22   17.755    52.21
3654.22   19.906    51.83
3754.22   21.802    51.52
3854.22   23.477    51.26
3954.22   24.960    51.03
4054.22   26.273    50.83
4154.22   27.437    50.64
4254.22   28.466    50.47
4354.22   29.375    50.31
4454.22   30.174    50.15
4554.22   30.874    50.01
4654.22   31.483    49.87
4754.22   32.008    49.74
4854.22   32.456    49.61
4954.22   32.831    49.48
5054.22   33.140    49.36
5154.22   33.385    49.24
5254.22   33.572    49.12
5354.22   33.703    49.00
5454.22   33.782    48.88
5554.22   33.812    48.76
5654.22   33.795    48.65
5754.22   33.733    48.53
5854.22   33.629    48.41
5954.22   33.485    48.29
6054.22   33.302    48.17
6154.22   33.082    48.05
6254.22   32.827    47.92
6354.22   32.538    47.80
6454.22   32.216    47.67
6554.22   31.863    47.54
6654.22   31.480    47.40
6754.22   31.068    47.27
6854.22   30.628    47.12
6954.22   30.161    46.98
7054.22   29.667    46.83






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 17:03:42



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