Double Star Calculator - Orbit

Orbital Elements for STF518BC
WDS: STF518BC WDS ID/Discoverer
P: 233.200 Orbital period (years)
a: 6.88788 Semi-major axis (arcseconds)
i: 107.98 Inclination (degrees)
Ω: 151.58 Longitude of ascending node (degrees)
T: 1848.789 Epoch of periastron passage (year)
e: 0.4141 Eccentricity
ω: 321.2 Longitude of periastron (degrees)
Start-Year: 1908.4 Year
End-Year: 2141.6 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF518BC
Position: 041521.79-073929.1 Epoch-2000 right ascension and declination
WDS-ID: 04153-0739 WDS designation
Discoverer Code: STF518BC Discover designation and components
ADS number: 3093 Aitken Double Star catalog
HD number: 26976 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 10.02 Magnitude of the primary
V2: 11.47 Magnitude of the secondary
Equinox: Equinox
Date: 2019 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: WSI2021 Reference

Double Star Orbit for STF518BC



WDS 6th Orbit including measures of STF518BC

-- 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 STF518BC
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    7.646   328.09
--------------------------
1908.40    2.591    43.88
1909.40    2.654    40.88
1910.40    2.721    38.03
1911.40    2.794    35.32
1912.40    2.872    32.76
1913.40    2.954    30.33
1914.40    3.040    28.04
1915.40    3.129    25.88
1916.40    3.221    23.84
1917.40    3.316    21.91
1918.40    3.413    20.09
1919.40    3.512    18.37
1920.40    3.613    16.75
1921.40    3.715    15.22
1922.40    3.818    13.77
1923.40    3.922    12.39
1924.40    4.027    11.09
1925.40    4.133     9.85
1926.40    4.239     8.68
1927.40    4.346     7.56
1928.40    4.452     6.50
1929.40    4.559     5.49
1930.40    4.665     4.52
1931.40    4.771     3.59
1932.40    4.877     2.71
1933.40    4.983     1.86
1934.40    5.088     1.05
1935.40    5.193     0.27
1936.40    5.297   359.52
1937.40    5.400   358.80
1938.40    5.503   358.11
1939.40    5.604   357.44
1940.40    5.705   356.80
1941.40    5.805   356.18
1942.40    5.904   355.58
1943.40    6.002   355.00
1944.40    6.099   354.44
1945.40    6.194   353.89
1946.40    6.289   353.36
1947.40    6.382   352.85
1948.40    6.474   352.35
1949.40    6.565   351.87
1950.40    6.655   351.40
1951.40    6.743   350.94
1952.40    6.830   350.49
1953.40    6.915   350.06
1954.40    6.999   349.63
1955.40    7.082   349.22
1956.40    7.163   348.81
1957.40    7.243   348.41
1958.40    7.321   348.03
1959.40    7.397   347.65
1960.40    7.472   347.27
1961.40    7.545   346.91
1962.40    7.617   346.55
1963.40    7.687   346.20
1964.40    7.755   345.85
1965.40    7.822   345.51
1966.40    7.887   345.18
1967.40    7.950   344.85
1968.40    8.011   344.53
1969.40    8.071   344.21
1970.40    8.128   343.90
1971.40    8.184   343.59
1972.40    8.238   343.28
1973.40    8.290   342.98
1974.40    8.340   342.68
1975.40    8.388   342.39
1976.40    8.434   342.10
1977.40    8.478   341.81
1978.40    8.521   341.53
1979.40    8.561   341.24
1980.40    8.599   340.97
1981.40    8.635   340.69
1982.40    8.669   340.41
1983.40    8.700   340.14
1984.40    8.730   339.87
1985.40    8.757   339.60
1986.40    8.783   339.33
1987.40    8.806   339.07
1988.40    8.826   338.80
1989.40    8.845   338.54
1990.40    8.861   338.28
1991.40    8.875   338.01
1992.40    8.886   337.75
1993.40    8.895   337.49
1994.40    8.902   337.23
1995.40    8.906   336.97
1996.40    8.907   336.71
1997.40    8.907   336.45
1998.40    8.903   336.20
1999.40    8.898   335.94
2000.40    8.889   335.68
2001.40    8.878   335.41
2002.40    8.864   335.15
2003.40    8.848   334.89
2004.40    8.829   334.63
2005.40    8.807   334.36
2006.40    8.782   334.10
2007.40    8.755   333.83
2008.40    8.725   333.56
2009.40    8.692   333.29
2010.40    8.656   333.01
2011.40    8.617   332.74
2012.40    8.575   332.46
2013.40    8.530   332.18
2014.40    8.482   331.89
2015.40    8.431   331.61
2016.40    8.377   331.32
2017.40    8.319   331.02
2018.40    8.259   330.72
2019.40    8.195   330.42
2020.40    8.128   330.11
2021.40    8.058   329.79
2022.40    7.984   329.47
2023.40    7.907   329.15
2024.40    7.826   328.82
2025.40    7.742   328.48
2026.40    7.655   328.13
2027.40    7.563   327.77
2028.40    7.469   327.41
2029.40    7.370   327.03
2030.40    7.268   326.65
2031.40    7.163   326.26
2032.40    7.053   325.85
2033.40    6.940   325.43
2034.40    6.823   324.99
2035.40    6.701   324.54
2036.40    6.577   324.08
2037.40    6.448   323.59
2038.40    6.315   323.09
2039.40    6.178   322.56
2040.40    6.037   322.01
2041.40    5.893   321.43
2042.40    5.744   320.82
2043.40    5.591   320.18
2044.40    5.434   319.50
2045.40    5.274   318.78
2046.40    5.109   318.02
2047.40    4.940   317.21
2048.40    4.768   316.33
2049.40    4.592   315.39
2050.40    4.413   314.38
2051.40    4.230   313.27
2052.40    4.043   312.07
2053.40    3.854   310.75
2054.40    3.662   309.29
2055.40    3.468   307.67
2056.40    3.273   305.86
2057.40    3.076   303.82
2058.40    2.879   301.49
2059.40    2.683   298.83
2060.40    2.489   295.74
2061.40    2.299   292.15
2062.40    2.115   287.91
2063.40    1.941   282.89
2064.40    1.781   276.94
2065.40    1.641   269.88
2066.40    1.525   261.63
2067.40    1.443   252.24
2068.40    1.400   242.00
2069.40    1.399   231.44
2070.40    1.442   221.19
2071.40    1.524   211.79
2072.40    1.638   203.52
2073.40    1.776   196.43
2074.40    1.932   190.42
2075.40    2.099   185.34
2076.40    2.274   181.03
2077.40    2.452   177.34
2078.40    2.631   174.15
2079.40    2.807   171.36
2080.40    2.979   168.90
2081.40    3.146   166.71
2082.40    3.305   164.73
2083.40    3.456   162.93
2084.40    3.598   161.27
2085.40    3.729   159.74
2086.40    3.850   158.31
2087.40    3.960   156.96
2088.40    4.059   155.68
2089.40    4.146   154.46
2090.40    4.222   153.28
2091.40    4.286   152.15
2092.40    4.339   151.04
2093.40    4.381   149.96
2094.40    4.412   148.89
2095.40    4.433   147.84
2096.40    4.445   146.80
2097.40    4.446   145.76
2098.40    4.439   144.71
2099.40    4.423   143.67
2100.40    4.399   142.61
2101.40    4.368   141.54
2102.40    4.330   140.45
2103.40    4.286   139.34
2104.40    4.235   138.21
2105.40    4.179   137.05
2106.40    4.118   135.85
2107.40    4.053   134.62
2108.40    3.983   133.34
2109.40    3.910   132.02
2110.40    3.834   130.65
2111.40    3.756   129.22
2112.40    3.675   127.73
2113.40    3.593   126.17
2114.40    3.509   124.54
2115.40    3.424   122.83
2116.40    3.339   121.03
2117.40    3.255   119.13
2118.40    3.171   117.14
2119.40    3.088   115.04
2120.40    3.006   112.82
2121.40    2.927   110.48
2122.40    2.851   108.02
2123.40    2.778   105.42
2124.40    2.709   102.68
2125.40    2.644    99.81
2126.40    2.584    96.79
2127.40    2.531    93.65
2128.40    2.483    90.37
2129.40    2.442    86.97
2130.40    2.409    83.47
2131.40    2.383    79.89
2132.40    2.365    76.23
2133.40    2.356    72.54
2134.40    2.355    68.83
2135.40    2.363    65.13
2136.40    2.379    61.47
2137.40    2.404    57.87
2138.40    2.437    54.35
2139.40    2.477    50.94
2140.40    2.525    47.65
2141.40    2.580    44.49






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 15:19:34



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