Double Star Calculator - Orbit

Orbital Elements for STF1820

WDS:	STF1820	WDS ID/Discoverer
P:	2202.524	Orbital period (years)
a:	12.27689	Semi-major axis (arcseconds)
i:	78.797	Inclination (degrees)
Ω:	16.072	Longitude of ascending node (degrees)
T:	1721.824	Epoch of periastron passage (year)
e:	0.87314	Eccentricity
ω:	298.951	Longitude of periastron (degrees)
Start-Year:	923.738	Year
End-Year:	3126.2619999999997	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1820
Position:	141300.76+551931.1	Epoch-2000 right ascension and declination
WDS-ID:	14131+5520	WDS designation
Discoverer Code:	STF1820	Discover designation and components
ADS number:	9167	Aitken Double Star catalog
HD number:	124640	HD catalog number
Hipparcos number:	69442	Hipparcos catalog number
V1:	9.06	Magnitude of the primary
V2:	9.42	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	4	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 STF1820

WDS 6th Orbit including measures of STF1820

-- 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 STF1820

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.879   125.72
--------------------------
923.74   13.308   181.14
933.74   13.331   181.27
943.74   13.353   181.40
953.74   13.373   181.53
963.74   13.391   181.66
973.74   13.407   181.79
983.74   13.422   181.92
993.74   13.434   182.05
1003.74   13.444   182.18
1013.74   13.452   182.31
1023.74   13.457   182.44
1033.74   13.461   182.57
1043.74   13.463   182.70
1053.74   13.462   182.83
1063.74   13.459   182.96
1073.74   13.454   183.08
1083.74   13.446   183.21
1093.74   13.436   183.34
1103.74   13.424   183.47
1113.74   13.409   183.60
1123.74   13.392   183.73
1133.74   13.372   183.86
1143.74   13.349   183.99
1153.74   13.324   184.12
1163.74   13.296   184.26
1173.74   13.265   184.39
1183.74   13.232   184.52
1193.74   13.195   184.65
1203.74   13.156   184.79
1213.74   13.113   184.92
1223.74   13.067   185.06
1233.74   13.018   185.20
1243.74   12.966   185.34
1253.74   12.910   185.47
1263.74   12.851   185.62
1273.74   12.789   185.76
1283.74   12.722   185.90
1293.74   12.652   186.05
1303.74   12.578   186.19
1313.74   12.500   186.34
1323.74   12.418   186.49
1333.74   12.331   186.64
1343.74   12.240   186.80
1353.74   12.145   186.95
1363.74   12.044   187.11
1373.74   11.939   187.28
1383.74   11.829   187.44
1393.74   11.713   187.61
1403.74   11.592   187.78
1413.74   11.464   187.96
1423.74   11.331   188.14
1433.74   11.192   188.32
1443.74   11.045   188.51
1453.74   10.892   188.70
1463.74   10.731   188.90
1473.74   10.563   189.11
1483.74   10.386   189.32
1493.74   10.201   189.54
1503.74   10.006   189.77
1513.74    9.801   190.01
1523.74    9.586   190.26
1533.74    9.359   190.52
1543.74    9.121   190.79
1553.74    8.868   191.08
1563.74    8.602   191.38
1573.74    8.319   191.71
1583.74    8.019   192.06
1593.74    7.700   192.44
1603.74    7.359   192.85
1613.74    6.994   193.30
1623.74    6.601   193.81
1633.74    6.175   194.38
1643.74    5.713   195.04
1653.74    5.205   195.82
1663.74    4.642   196.79
1673.74    4.012   198.04
1683.74    3.293   199.79
1693.74    2.460   202.65
1703.74    1.478   208.98
1713.74    0.416   248.73
1723.74    1.002     2.29
1733.74    1.866    14.21
1743.74    2.359    19.38
1753.74    2.620    23.12
1763.74    2.751    26.33
1773.74    2.807    29.34
1783.74    2.815    32.29
1793.74    2.794    35.25
1803.74    2.754    38.28
1813.74    2.701    41.42
1823.74    2.642    44.69
1833.74    2.579    48.11
1843.74    2.516    51.71
1853.74    2.456    55.48
1863.74    2.401    59.44
1873.74    2.351    63.58
1883.74    2.310    67.87
1893.74    2.278    72.31
1903.74    2.257    76.85
1913.74    2.246    81.46
1923.74    2.248    86.08
1933.74    2.261    90.68
1943.74    2.286    95.20
1953.74    2.323    99.59
1963.74    2.371   103.83
1973.74    2.430   107.88
1983.74    2.498   111.73
1993.74    2.575   115.36
2003.74    2.660   118.77
2013.74    2.752   121.96
2023.74    2.851   124.93
2033.74    2.955   127.70
2043.74    3.063   130.28
2053.74    3.177   132.68
2063.74    3.293   134.91
2073.74    3.413   136.99
2083.74    3.536   138.92
2093.74    3.661   140.72
2103.74    3.788   142.40
2113.74    3.917   143.98
2123.74    4.046   145.45
2133.74    4.177   146.83
2143.74    4.309   148.13
2153.74    4.442   149.35
2163.74    4.575   150.49
2173.74    4.708   151.58
2183.74    4.842   152.60
2193.74    4.976   153.57
2203.74    5.110   154.49
2213.74    5.243   155.36
2223.74    5.377   156.18
2233.74    5.510   156.97
2243.74    5.643   157.72
2253.74    5.775   158.44
2263.74    5.907   159.12
2273.74    6.039   159.78
2283.74    6.169   160.40
2293.74    6.300   161.00
2303.74    6.429   161.58
2313.74    6.558   162.13
2323.74    6.687   162.66
2333.74    6.814   163.18
2343.74    6.941   163.67
2353.74    7.067   164.15
2363.74    7.192   164.60
2373.74    7.316   165.05
2383.74    7.439   165.48
2393.74    7.562   165.89
2403.74    7.683   166.29
2413.74    7.804   166.68
2423.74    7.923   167.06
2433.74    8.042   167.43
2443.74    8.160   167.78
2453.74    8.276   168.13
2463.74    8.392   168.46
2473.74    8.507   168.79
2483.74    8.620   169.11
2493.74    8.733   169.42
2503.74    8.845   169.72
2513.74    8.955   170.01
2523.74    9.065   170.30
2533.74    9.173   170.58
2543.74    9.280   170.86
2553.74    9.386   171.12
2563.74    9.491   171.39
2573.74    9.595   171.64
2583.74    9.698   171.89
2593.74    9.800   172.14
2603.74    9.900   172.38
2613.74    9.999   172.61
2623.74   10.098   172.85
2633.74   10.195   173.07
2643.74   10.290   173.29
2653.74   10.385   173.51
2663.74   10.479   173.73
2673.74   10.571   173.94
2683.74   10.662   174.15
2693.74   10.752   174.35
2703.74   10.840   174.55
2713.74   10.927   174.75
2723.74   11.013   174.94
2733.74   11.098   175.13
2743.74   11.182   175.32
2753.74   11.264   175.50
2763.74   11.345   175.69
2773.74   11.425   175.87
2783.74   11.503   176.04
2793.74   11.580   176.22
2803.74   11.656   176.39
2813.74   11.730   176.56
2823.74   11.803   176.73
2833.74   11.875   176.90
2843.74   11.945   177.06
2853.74   12.014   177.22
2863.74   12.081   177.39
2873.74   12.147   177.54
2883.74   12.212   177.70
2893.74   12.275   177.86
2903.74   12.337   178.01
2913.74   12.397   178.16
2923.74   12.456   178.32
2933.74   12.514   178.46
2943.74   12.569   178.61
2953.74   12.624   178.76
2963.74   12.677   178.91
2973.74   12.728   179.05
2983.74   12.778   179.19
2993.74   12.826   179.34
3003.74   12.873   179.48
3013.74   12.918   179.62
3023.74   12.961   179.76
3033.74   13.003   179.90
3043.74   13.043   180.03
3053.74   13.081   180.17
3063.74   13.118   180.31
3073.74   13.153   180.44
3083.74   13.186   180.58
3093.74   13.218   180.71
3103.74   13.247   180.84
3113.74   13.275   180.98
3123.74   13.301   181.11

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 17:03:28