Double Star Calculator - Orbit

Orbital Elements for STF1621
WDS: STF1621 WDS ID/Discoverer
P: 1379.880 Orbital period (years)
a: 3.9723 Semi-major axis (arcseconds)
i: 23.329 Inclination (degrees)
Ω: 178.461 Longitude of ascending node (degrees)
T: 1973.818 Epoch of periastron passage (year)
e: 0.90649 Eccentricity
ω: 99.765 Longitude of periastron (degrees)
Start-Year: 1335.0598 Year
End-Year: 2714.9402 Year
Epoch: 2026.5 Besselian Epoch
 
Further data from the WDS Sixth Catalog of Orbits for STF1621
Position: 121558.34+053824.8 Epoch-2000 right ascension and declination
WDS-ID: 12160+0538 WDS designation
Discoverer Code: STF1621 Discover designation and components
ADS number: 8486 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 59816 Hipparcos catalog number
V1: 10.22 Magnitude of the primary
V2: 10.59 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 STF1621



WDS 6th Orbit including measures of STF1621

-- 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 STF1621
Click to expand/collapse ephemeris: 
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.930    52.03
--------------------------
1335.06    6.954   100.76
1345.06    6.945   101.09
1355.06    6.934   101.42
1365.06    6.920   101.75
1375.06    6.905   102.09
1385.06    6.889   102.42
1395.06    6.870   102.76
1405.06    6.849   103.10
1415.06    6.826   103.44
1425.06    6.802   103.78
1435.06    6.775   104.13
1445.06    6.747   104.48
1455.06    6.716   104.83
1465.06    6.683   105.19
1475.06    6.649   105.55
1485.06    6.612   105.91
1495.06    6.573   106.28
1505.06    6.533   106.65
1515.06    6.490   107.03
1525.06    6.444   107.41
1535.06    6.397   107.79
1545.06    6.348   108.19
1555.06    6.296   108.59
1565.06    6.242   108.99
1575.06    6.185   109.41
1585.06    6.126   109.83
1595.06    6.065   110.26
1605.06    6.001   110.70
1615.06    5.935   111.14
1625.06    5.866   111.60
1635.06    5.794   112.07
1645.06    5.720   112.55
1655.06    5.643   113.05
1665.06    5.563   113.56
1675.06    5.480   114.08
1685.06    5.394   114.62
1695.06    5.305   115.18
1705.06    5.213   115.75
1715.06    5.118   116.35
1725.06    5.019   116.97
1735.06    4.916   117.62
1745.06    4.809   118.30
1755.06    4.699   119.00
1765.06    4.585   119.74
1775.06    4.466   120.52
1785.06    4.343   121.34
1795.06    4.215   122.22
1805.06    4.081   123.14
1815.06    3.943   124.14
1825.06    3.799   125.20
1835.06    3.648   126.35
1845.06    3.491   127.61
1855.06    3.326   128.98
1865.06    3.154   130.50
1875.06    2.973   132.20
1885.06    2.782   134.13
1895.06    2.579   136.35
1905.06    2.364   138.97
1915.06    2.134   142.13
1925.06    1.886   146.09
1935.06    1.615   151.32
1945.06    1.315   158.80
1955.06    0.977   171.14
1965.06    0.589   198.62
1975.06    0.353   295.63
1985.06    0.690     6.03
1995.06    1.046    27.94
2005.06    1.358    39.12
2015.06    1.639    46.27
2025.06    1.895    51.41
2035.06    2.131    55.35
2045.06    2.352    58.53
2055.06    2.559    61.18
2065.06    2.755    63.45
2075.06    2.941    65.41
2085.06    3.117    67.15
2095.06    3.286    68.71
2105.06    3.447    70.12
2115.06    3.601    71.41
2125.06    3.749    72.59
2135.06    3.892    73.68
2145.06    4.028    74.70
2155.06    4.160    75.65
2165.06    4.287    76.55
2175.06    4.409    77.39
2185.06    4.527    78.19
2195.06    4.641    78.95
2205.06    4.751    79.67
2215.06    4.857    80.36
2225.06    4.960    81.03
2235.06    5.059    81.66
2245.06    5.155    82.28
2255.06    5.247    82.87
2265.06    5.337    83.44
2275.06    5.423    83.99
2285.06    5.507    84.52
2295.06    5.587    85.04
2305.06    5.665    85.54
2315.06    5.740    86.03
2325.06    5.813    86.51
2335.06    5.883    86.98
2345.06    5.950    87.44
2355.06    6.015    87.88
2365.06    6.077    88.32
2375.06    6.137    88.75
2385.06    6.195    89.17
2395.06    6.251    89.58
2405.06    6.304    89.98
2415.06    6.355    90.38
2425.06    6.404    90.77
2435.06    6.450    91.16
2445.06    6.495    91.54
2455.06    6.537    91.92
2465.06    6.577    92.29
2475.06    6.616    92.65
2485.06    6.652    93.02
2495.06    6.686    93.38
2505.06    6.718    93.73
2515.06    6.749    94.08
2525.06    6.777    94.43
2535.06    6.803    94.78
2545.06    6.828    95.12
2555.06    6.850    95.46
2565.06    6.871    95.80
2575.06    6.889    96.14
2585.06    6.906    96.48
2595.06    6.921    96.81
2605.06    6.934    97.14
2615.06    6.945    97.47
2625.06    6.954    97.80
2635.06    6.962    98.13
2645.06    6.967    98.46
2655.06    6.971    98.79
2665.06    6.973    99.12
2675.06    6.973    99.45
2685.06    6.971    99.78
2695.06    6.967   100.10
2705.06    6.961   100.43



 

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 16:44:52


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