Double Star Calculator - Orbit

Orbital Elements for STF1211AB
WDS: STF1211AB WDS ID/Discoverer
P: 407.000 Orbital period (years)
a: 1.11 Semi-major axis (arcseconds)
i: 98.5 Inclination (degrees)
Ω: 133.5 Longitude of ascending node (degrees)
T: 1959.000 Epoch of periastron passage (year)
e: 0.65 Eccentricity
ω: 157.0 Longitude of periastron (degrees)
Start-Year: 1821.5 Year
End-Year: 2228.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1211AB
Position: 081819.65+385910.0 Epoch-2000 right ascension and declination
WDS-ID: 08183+3859 WDS designation
Discoverer Code: STF1211AB Discover designation and components
ADS number: 6721 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 40681 Hipparcos catalog number
V1: 9.65 Magnitude of the primary
V2: 9.97 Magnitude of the secondary
Equinox: Equinox
Date: 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: Hei1996c Reference

Double Star Orbit for STF1211AB



WDS 6th Orbit including measures of STF1211AB

-- 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 STF1211AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.484   153.19
--------------------------
1821.50    1.683   134.36
1822.50    1.679   134.32
1823.50    1.676   134.28
1824.50    1.672   134.23
1825.50    1.668   134.19
1826.50    1.664   134.14
1827.50    1.660   134.10
1828.50    1.656   134.06
1829.50    1.651   134.01
1830.50    1.647   133.97
1831.50    1.642   133.92
1832.50    1.638   133.88
1833.50    1.633   133.83
1834.50    1.628   133.78
1835.50    1.623   133.74
1836.50    1.618   133.69
1837.50    1.613   133.64
1838.50    1.607   133.60
1839.50    1.602   133.55
1840.50    1.596   133.50
1841.50    1.590   133.45
1842.50    1.584   133.40
1843.50    1.578   133.35
1844.50    1.572   133.31
1845.50    1.566   133.26
1846.50    1.559   133.21
1847.50    1.553   133.16
1848.50    1.546   133.10
1849.50    1.539   133.05
1850.50    1.532   133.00
1851.50    1.525   132.95
1852.50    1.518   132.90
1853.50    1.510   132.84
1854.50    1.503   132.79
1855.50    1.495   132.73
1856.50    1.487   132.68
1857.50    1.480   132.62
1858.50    1.471   132.57
1859.50    1.463   132.51
1860.50    1.455   132.45
1861.50    1.446   132.39
1862.50    1.438   132.34
1863.50    1.429   132.28
1864.50    1.420   132.22
1865.50    1.411   132.15
1866.50    1.401   132.09
1867.50    1.392   132.03
1868.50    1.382   131.97
1869.50    1.372   131.90
1870.50    1.362   131.84
1871.50    1.352   131.77
1872.50    1.342   131.70
1873.50    1.332   131.63
1874.50    1.321   131.56
1875.50    1.310   131.49
1876.50    1.299   131.42
1877.50    1.288   131.35
1878.50    1.277   131.27
1879.50    1.265   131.20
1880.50    1.254   131.12
1881.50    1.242   131.04
1882.50    1.230   130.96
1883.50    1.217   130.88
1884.50    1.205   130.80
1885.50    1.192   130.71
1886.50    1.180   130.62
1887.50    1.167   130.54
1888.50    1.153   130.44
1889.50    1.140   130.35
1890.50    1.126   130.26
1891.50    1.112   130.16
1892.50    1.098   130.06
1893.50    1.084   129.96
1894.50    1.070   129.85
1895.50    1.055   129.74
1896.50    1.040   129.63
1897.50    1.025   129.52
1898.50    1.010   129.40
1899.50    0.994   129.27
1900.50    0.978   129.15
1901.50    0.962   129.02
1902.50    0.946   128.88
1903.50    0.929   128.75
1904.50    0.913   128.60
1905.50    0.896   128.45
1906.50    0.878   128.30
1907.50    0.861   128.13
1908.50    0.843   127.97
1909.50    0.825   127.79
1910.50    0.807   127.61
1911.50    0.788   127.41
1912.50    0.769   127.21
1913.50    0.750   127.00
1914.50    0.731   126.78
1915.50    0.711   126.54
1916.50    0.691   126.29
1917.50    0.671   126.03
1918.50    0.650   125.75
1919.50    0.629   125.45
1920.50    0.608   125.13
1921.50    0.586   124.78
1922.50    0.565   124.41
1923.50    0.542   124.01
1924.50    0.520   123.58
1925.50    0.497   123.11
1926.50    0.474   122.59
1927.50    0.451   122.01
1928.50    0.427   121.38
1929.50    0.403   120.67
1930.50    0.379   119.87
1931.50    0.355   118.96
1932.50    0.330   117.91
1933.50    0.305   116.69
1934.50    0.280   115.26
1935.50    0.255   113.54
1936.50    0.229   111.45
1937.50    0.204   108.83
1938.50    0.179   105.48
1939.50    0.155   101.07
1940.50    0.131    95.04
1941.50    0.110    86.51
1942.50    0.091    74.23
1943.50    0.079    57.03
1944.50    0.075    36.06
1945.50    0.082    15.89
1946.50    0.097     0.26
1947.50    0.116   349.27
1948.50    0.138   341.60
1949.50    0.161   336.10
1950.50    0.185   332.01
1951.50    0.209   328.85
1952.50    0.233   326.33
1953.50    0.255   324.27
1954.50    0.277   322.54
1955.50    0.298   321.06
1956.50    0.317   319.77
1957.50    0.335   318.62
1958.50    0.351   317.58
1959.50    0.365   316.62
1960.50    0.377   315.74
1961.50    0.388   314.90
1962.50    0.396   314.10
1963.50    0.402   313.33
1964.50    0.407   312.59
1965.50    0.409   311.85
1966.50    0.410   311.12
1967.50    0.409   310.39
1968.50    0.406   309.65
1969.50    0.402   308.91
1970.50    0.397   308.14
1971.50    0.391   307.35
1972.50    0.383   306.53
1973.50    0.375   305.68
1974.50    0.365   304.79
1975.50    0.355   303.84
1976.50    0.344   302.84
1977.50    0.333   301.78
1978.50    0.321   300.63
1979.50    0.309   299.40
1980.50    0.297   298.06
1981.50    0.284   296.61
1982.50    0.271   295.02
1983.50    0.258   293.26
1984.50    0.244   291.32
1985.50    0.231   289.15
1986.50    0.218   286.73
1987.50    0.206   284.00
1988.50    0.193   280.92
1989.50    0.181   277.42
1990.50    0.170   273.44
1991.50    0.159   268.91
1992.50    0.150   263.78
1993.50    0.142   258.00
1994.50    0.135   251.58
1995.50    0.130   244.57
1996.50    0.127   237.13
1997.50    0.126   229.46
1998.50    0.128   221.82
1999.50    0.131   214.48
2000.50    0.136   207.62
2001.50    0.144   201.36
2002.50    0.152   195.76
2003.50    0.162   190.81
2004.50    0.173   186.45
2005.50    0.185   182.62
2006.50    0.197   179.27
2007.50    0.210   176.31
2008.50    0.224   173.71
2009.50    0.237   171.40
2010.50    0.251   169.34
2011.50    0.265   167.51
2012.50    0.280   165.85
2013.50    0.294   164.37
2014.50    0.309   163.02
2015.50    0.323   161.79
2016.50    0.338   160.67
2017.50    0.352   159.64
2018.50    0.367   158.69
2019.50    0.382   157.82
2020.50    0.397   157.01
2021.50    0.411   156.26
2022.50    0.426   155.56
2023.50    0.441   154.91
2024.50    0.455   154.30
2025.50    0.470   153.73
2026.50    0.484   153.19
2027.50    0.499   152.68
2028.50    0.513   152.20
2029.50    0.527   151.75
2030.50    0.542   151.32
2031.50    0.556   150.92
2032.50    0.570   150.53
2033.50    0.584   150.16
2034.50    0.598   149.81
2035.50    0.612   149.48
2036.50    0.626   149.16
2037.50    0.640   148.85
2038.50    0.653   148.56
2039.50    0.667   148.28
2040.50    0.680   148.01
2041.50    0.694   147.75
2042.50    0.707   147.50
2043.50    0.721   147.26
2044.50    0.734   147.03
2045.50    0.747   146.80
2046.50    0.760   146.59
2047.50    0.773   146.38
2048.50    0.786   146.18
2049.50    0.799   145.98
2050.50    0.811   145.79
2051.50    0.824   145.61
2052.50    0.836   145.43
2053.50    0.849   145.26
2054.50    0.861   145.09
2055.50    0.874   144.93
2056.50    0.886   144.77
2057.50    0.898   144.62
2058.50    0.910   144.47
2059.50    0.922   144.32
2060.50    0.934   144.18
2061.50    0.945   144.04
2062.50    0.957   143.91
2063.50    0.969   143.77
2064.50    0.980   143.64
2065.50    0.992   143.52
2066.50    1.003   143.40
2067.50    1.014   143.28
2068.50    1.025   143.16
2069.50    1.036   143.04
2070.50    1.047   142.93
2071.50    1.058   142.82
2072.50    1.069   142.71
2073.50    1.080   142.61
2074.50    1.090   142.50
2075.50    1.101   142.40
2076.50    1.111   142.30
2077.50    1.122   142.20
2078.50    1.132   142.10
2079.50    1.142   142.01
2080.50    1.152   141.92
2081.50    1.162   141.83
2082.50    1.172   141.74
2083.50    1.182   141.65
2084.50    1.192   141.56
2085.50    1.201   141.47
2086.50    1.211   141.39
2087.50    1.221   141.31
2088.50    1.230   141.23
2089.50    1.239   141.15
2090.50    1.249   141.07
2091.50    1.258   140.99
2092.50    1.267   140.91
2093.50    1.276   140.84
2094.50    1.285   140.76
2095.50    1.293   140.69
2096.50    1.302   140.62
2097.50    1.311   140.54
2098.50    1.319   140.47
2099.50    1.328   140.40
2100.50    1.336   140.33
2101.50    1.345   140.27
2102.50    1.353   140.20
2103.50    1.361   140.13
2104.50    1.369   140.07
2105.50    1.377   140.00
2106.50    1.385   139.94
2107.50    1.393   139.87
2108.50    1.400   139.81
2109.50    1.408   139.75
2110.50    1.415   139.69
2111.50    1.423   139.63
2112.50    1.430   139.57
2113.50    1.438   139.51
2114.50    1.445   139.45
2115.50    1.452   139.39
2116.50    1.459   139.33
2117.50    1.466   139.27
2118.50    1.473   139.22
2119.50    1.479   139.16
2120.50    1.486   139.11
2121.50    1.493   139.05
2122.50    1.499   139.00
2123.50    1.506   138.94
2124.50    1.512   138.89
2125.50    1.518   138.83
2126.50    1.524   138.78
2127.50    1.530   138.73
2128.50    1.536   138.68
2129.50    1.542   138.63
2130.50    1.548   138.57
2131.50    1.554   138.52
2132.50    1.560   138.47
2133.50    1.565   138.42
2134.50    1.571   138.37
2135.50    1.576   138.32
2136.50    1.581   138.27
2137.50    1.587   138.23
2138.50    1.592   138.18
2139.50    1.597   138.13
2140.50    1.602   138.08
2141.50    1.607   138.03
2142.50    1.611   137.99
2143.50    1.616   137.94
2144.50    1.621   137.89
2145.50    1.625   137.85
2146.50    1.630   137.80
2147.50    1.634   137.75
2148.50    1.638   137.71
2149.50    1.643   137.66
2150.50    1.647   137.62
2151.50    1.651   137.57
2152.50    1.655   137.53
2153.50    1.659   137.48
2154.50    1.662   137.44
2155.50    1.666   137.39
2156.50    1.670   137.35
2157.50    1.673   137.31
2158.50    1.676   137.26
2159.50    1.680   137.22
2160.50    1.683   137.18
2161.50    1.686   137.13
2162.50    1.689   137.09
2163.50    1.692   137.05
2164.50    1.695   137.00
2165.50    1.698   136.96
2166.50    1.701   136.92
2167.50    1.703   136.88
2168.50    1.706   136.84
2169.50    1.708   136.79
2170.50    1.710   136.75
2171.50    1.713   136.71
2172.50    1.715   136.67
2173.50    1.717   136.63
2174.50    1.719   136.58
2175.50    1.721   136.54
2176.50    1.723   136.50
2177.50    1.724   136.46
2178.50    1.726   136.42
2179.50    1.727   136.38
2180.50    1.729   136.34
2181.50    1.730   136.30
2182.50    1.731   136.26
2183.50    1.733   136.22
2184.50    1.734   136.17
2185.50    1.735   136.13
2186.50    1.735   136.09
2187.50    1.736   136.05
2188.50    1.737   136.01
2189.50    1.738   135.97
2190.50    1.738   135.93
2191.50    1.738   135.89
2192.50    1.739   135.85
2193.50    1.739   135.81
2194.50    1.739   135.77
2195.50    1.739   135.73
2196.50    1.739   135.69
2197.50    1.739   135.65
2198.50    1.739   135.61
2199.50    1.738   135.57
2200.50    1.738   135.53
2201.50    1.737   135.49
2202.50    1.736   135.44
2203.50    1.736   135.40
2204.50    1.735   135.36
2205.50    1.734   135.32
2206.50    1.733   135.28
2207.50    1.732   135.24
2208.50    1.730   135.20
2209.50    1.729   135.16
2210.50    1.727   135.12
2211.50    1.726   135.08
2212.50    1.724   135.04
2213.50    1.722   134.99
2214.50    1.721   134.95
2215.50    1.719   134.91
2216.50    1.716   134.87
2217.50    1.714   134.83
2218.50    1.712   134.79
2219.50    1.709   134.75
2220.50    1.707   134.70
2221.50    1.704   134.66
2222.50    1.702   134.62
2223.50    1.699   134.58
2224.50    1.696   134.53
2225.50    1.693   134.49
2226.50    1.690   134.45
2227.50    1.686   134.41






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 16:06:24



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