Double Star Calculator - Orbit

Orbital Elements for STF566AB,C
WDS: STF566AB,C WDS ID/Discoverer
P: 203.900 Orbital period (years)
a: 3.079 Semi-major axis (arcseconds)
i: 100.4 Inclination (degrees)
Ω: 148.2 Longitude of ascending node (degrees)
T: 2020.470 Epoch of periastron passage (year)
e: 0.932 Eccentricity
ω: 78.9 Longitude of periastron (degrees)
Start-Year: 1923.05 Year
End-Year: 2126.95 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF566AB,C
Position: 043958.03+532823.7 Epoch-2000 right ascension and declination
WDS-ID: 04400+5328 WDS designation
Discoverer Code: STF566AB,C Discover designation and components
ADS number: 3358 Aitken Double Star catalog
HD number: 29316 HD catalog number
Hipparcos number: 21730 Hipparcos catalog number
V1: 5.56 Magnitude of the primary
V2: 7.49 Magnitude of the secondary
Equinox: Equinox
Date: 2016 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: USN2021b Reference

Double Star Orbit for STF566AB,C



WDS 6th Orbit including measures of STF566AB,C

-- 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 STF566AB,C
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.094   320.12
--------------------------
1923.05    1.499   283.46
1924.05    1.486   282.96
1925.05    1.473   282.46
1926.05    1.460   281.95
1927.05    1.447   281.44
1928.05    1.433   280.91
1929.05    1.420   280.37
1930.05    1.407   279.82
1931.05    1.393   279.26
1932.05    1.380   278.69
1933.05    1.366   278.11
1934.05    1.353   277.52
1935.05    1.339   276.92
1936.05    1.325   276.30
1937.05    1.312   275.67
1938.05    1.298   275.03
1939.05    1.284   274.37
1940.05    1.271   273.70
1941.05    1.257   273.01
1942.05    1.243   272.31
1943.05    1.229   271.59
1944.05    1.216   270.86
1945.05    1.202   270.11
1946.05    1.188   269.35
1947.05    1.175   268.56
1948.05    1.161   267.76
1949.05    1.148   266.94
1950.05    1.134   266.09
1951.05    1.121   265.23
1952.05    1.108   264.35
1953.05    1.094   263.45
1954.05    1.081   262.52
1955.05    1.068   261.57
1956.05    1.055   260.60
1957.05    1.042   259.61
1958.05    1.030   258.59
1959.05    1.017   257.54
1960.05    1.005   256.47
1961.05    0.993   255.37
1962.05    0.981   254.25
1963.05    0.969   253.09
1964.05    0.957   251.91
1965.05    0.946   250.71
1966.05    0.935   249.47
1967.05    0.924   248.20
1968.05    0.914   246.90
1969.05    0.903   245.58
1970.05    0.893   244.22
1971.05    0.884   242.83
1972.05    0.874   241.41
1973.05    0.865   239.96
1974.05    0.856   238.48
1975.05    0.848   236.98
1976.05    0.840   235.44
1977.05    0.832   233.87
1978.05    0.825   232.28
1979.05    0.818   230.66
1980.05    0.812   229.01
1981.05    0.806   227.33
1982.05    0.800   225.64
1983.05    0.795   223.92
1984.05    0.791   222.17
1985.05    0.787   220.41
1986.05    0.783   218.63
1987.05    0.779   216.84
1988.05    0.777   215.03
1989.05    0.774   213.21
1990.05    0.772   211.37
1991.05    0.771   209.53
1992.05    0.769   207.69
1993.05    0.769   205.83
1994.05    0.768   203.98
1995.05    0.768   202.12
1996.05    0.768   200.26
1997.05    0.769   198.41
1998.05    0.769   196.56
1999.05    0.770   194.71
2000.05    0.771   192.86
2001.05    0.772   191.02
2002.05    0.773   189.19
2003.05    0.774   187.35
2004.05    0.774   185.53
2005.05    0.774   183.70
2006.05    0.774   181.87
2007.05    0.773   180.04
2008.05    0.772   178.21
2009.05    0.769   176.36
2010.05    0.764   174.50
2011.05    0.758   172.61
2012.05    0.750   170.69
2013.05    0.738   168.71
2014.05    0.722   166.66
2015.05    0.700   164.49
2016.05    0.670   162.17
2017.05    0.628   159.58
2018.05    0.563   156.50
2019.05    0.455   152.31
2020.05    0.225   142.69
2021.05    0.232   335.95
2022.05    0.526   327.60
2023.05    0.713   324.73
2024.05    0.852   322.94
2025.05    0.963   321.61
2026.05    1.057   320.54
2027.05    1.137   319.63
2028.05    1.208   318.83
2029.05    1.270   318.12
2030.05    1.327   317.47
2031.05    1.378   316.87
2032.05    1.424   316.31
2033.05    1.467   315.79
2034.05    1.506   315.29
2035.05    1.542   314.82
2036.05    1.575   314.37
2037.05    1.606   313.94
2038.05    1.635   313.52
2039.05    1.662   313.12
2040.05    1.687   312.73
2041.05    1.710   312.35
2042.05    1.731   311.98
2043.05    1.752   311.62
2044.05    1.770   311.27
2045.05    1.788   310.92
2046.05    1.804   310.58
2047.05    1.820   310.25
2048.05    1.834   309.92
2049.05    1.847   309.59
2050.05    1.859   309.28
2051.05    1.870   308.96
2052.05    1.881   308.65
2053.05    1.891   308.34
2054.05    1.899   308.04
2055.05    1.907   307.73
2056.05    1.915   307.43
2057.05    1.922   307.14
2058.05    1.928   306.84
2059.05    1.933   306.55
2060.05    1.938   306.26
2061.05    1.942   305.96
2062.05    1.946   305.67
2063.05    1.949   305.39
2064.05    1.952   305.10
2065.05    1.954   304.81
2066.05    1.955   304.52
2067.05    1.957   304.24
2068.05    1.957   303.95
2069.05    1.957   303.67
2070.05    1.957   303.38
2071.05    1.957   303.09
2072.05    1.956   302.81
2073.05    1.954   302.52
2074.05    1.953   302.23
2075.05    1.950   301.95
2076.05    1.948   301.66
2077.05    1.945   301.37
2078.05    1.942   301.08
2079.05    1.938   300.79
2080.05    1.934   300.50
2081.05    1.930   300.20
2082.05    1.926   299.91
2083.05    1.921   299.61
2084.05    1.916   299.32
2085.05    1.911   299.02
2086.05    1.905   298.71
2087.05    1.899   298.41
2088.05    1.893   298.11
2089.05    1.886   297.80
2090.05    1.880   297.49
2091.05    1.873   297.18
2092.05    1.866   296.87
2093.05    1.858   296.55
2094.05    1.851   296.23
2095.05    1.843   295.91
2096.05    1.835   295.59
2097.05    1.826   295.26
2098.05    1.818   294.93
2099.05    1.809   294.60
2100.05    1.800   294.26
2101.05    1.791   293.92
2102.05    1.782   293.58
2103.05    1.772   293.23
2104.05    1.762   292.88
2105.05    1.753   292.53
2106.05    1.743   292.17
2107.05    1.732   291.81
2108.05    1.722   291.44
2109.05    1.711   291.07
2110.05    1.701   290.69
2111.05    1.690   290.31
2112.05    1.679   289.92
2113.05    1.668   289.53
2114.05    1.656   289.14
2115.05    1.645   288.73
2116.05    1.633   288.33
2117.05    1.621   287.91
2118.05    1.610   287.49
2119.05    1.598   287.07
2120.05    1.585   286.63
2121.05    1.573   286.20
2122.05    1.561   285.75
2123.05    1.548   285.30
2124.05    1.536   284.84
2125.05    1.523   284.37
2126.05    1.510   283.89






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 15:28:39



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