Double Star Calculator - Orbit

Orbital Elements for STF2900AB
WDS: STF2900AB WDS ID/Discoverer
P: 407.100 Orbital period (years)
a: 2.03 Semi-major axis (arcseconds)
i: 91.5 Inclination (degrees)
Ω: 180.4 Longitude of ascending node (degrees)
T: 2000.070 Epoch of periastron passage (year)
e: 0.827 Eccentricity
ω: 220.6 Longitude of periastron (degrees)
Start-Year: 1821.45 Year
End-Year: 2228.55 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2900AB
Position: 222339.56+205054.0 Epoch-2000 right ascension and declination
WDS-ID: 22237+2051 WDS designation
Discoverer Code: STF2900AB Discover designation and components
ADS number: 15896 Aitken Double Star catalog
HD number: 212395 HD catalog number
Hipparcos number: 110548 Hipparcos catalog number
V1: 6.28 Magnitude of the primary
V2: 9.18 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2017 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: Tok2018b Reference

Double Star Orbit for STF2900AB



WDS 6th Orbit including measures of STF2900AB

-- 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 STF2900AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.356   180.65
--------------------------
1821.45    2.627   178.93
1822.45    2.618   178.93
1823.45    2.609   178.92
1824.45    2.599   178.91
1825.45    2.590   178.90
1826.45    2.581   178.90
1827.45    2.571   178.89
1828.45    2.562   178.88
1829.45    2.552   178.87
1830.45    2.542   178.86
1831.45    2.532   178.85
1832.45    2.522   178.85
1833.45    2.512   178.84
1834.45    2.502   178.83
1835.45    2.491   178.82
1836.45    2.481   178.81
1837.45    2.470   178.80
1838.45    2.459   178.79
1839.45    2.449   178.78
1840.45    2.438   178.78
1841.45    2.427   178.77
1842.45    2.416   178.76
1843.45    2.404   178.75
1844.45    2.393   178.74
1845.45    2.382   178.73
1846.45    2.370   178.72
1847.45    2.359   178.71
1848.45    2.347   178.70
1849.45    2.335   178.69
1850.45    2.323   178.68
1851.45    2.311   178.67
1852.45    2.299   178.66
1853.45    2.287   178.65
1854.45    2.274   178.64
1855.45    2.262   178.63
1856.45    2.249   178.62
1857.45    2.237   178.61
1858.45    2.224   178.60
1859.45    2.211   178.59
1860.45    2.198   178.58
1861.45    2.185   178.57
1862.45    2.172   178.55
1863.45    2.158   178.54
1864.45    2.145   178.53
1865.45    2.131   178.52
1866.45    2.118   178.51
1867.45    2.104   178.50
1868.45    2.090   178.48
1869.45    2.076   178.47
1870.45    2.062   178.46
1871.45    2.048   178.45
1872.45    2.034   178.43
1873.45    2.019   178.42
1874.45    2.005   178.41
1875.45    1.990   178.39
1876.45    1.975   178.38
1877.45    1.961   178.37
1878.45    1.946   178.35
1879.45    1.931   178.34
1880.45    1.916   178.32
1881.45    1.900   178.31
1882.45    1.885   178.29
1883.45    1.870   178.28
1884.45    1.854   178.26
1885.45    1.838   178.25
1886.45    1.822   178.23
1887.45    1.807   178.21
1888.45    1.791   178.20
1889.45    1.774   178.18
1890.45    1.758   178.16
1891.45    1.742   178.15
1892.45    1.725   178.13
1893.45    1.709   178.11
1894.45    1.692   178.09
1895.45    1.675   178.07
1896.45    1.658   178.05
1897.45    1.641   178.03
1898.45    1.624   178.01
1899.45    1.607   177.99
1900.45    1.590   177.97
1901.45    1.572   177.95
1902.45    1.555   177.93
1903.45    1.537   177.91
1904.45    1.519   177.88
1905.45    1.501   177.86
1906.45    1.483   177.84
1907.45    1.465   177.81
1908.45    1.447   177.79
1909.45    1.428   177.76
1910.45    1.410   177.73
1911.45    1.391   177.71
1912.45    1.372   177.68
1913.45    1.353   177.65
1914.45    1.334   177.62
1915.45    1.315   177.59
1916.45    1.296   177.56
1917.45    1.277   177.52
1918.45    1.257   177.49
1919.45    1.238   177.46
1920.45    1.218   177.42
1921.45    1.198   177.38
1922.45    1.178   177.35
1923.45    1.158   177.31
1924.45    1.138   177.27
1925.45    1.117   177.22
1926.45    1.097   177.18
1927.45    1.076   177.13
1928.45    1.056   177.09
1929.45    1.035   177.04
1930.45    1.014   176.99
1931.45    0.993   176.93
1932.45    0.972   176.88
1933.45    0.950   176.82
1934.45    0.929   176.76
1935.45    0.907   176.70
1936.45    0.886   176.63
1937.45    0.864   176.56
1938.45    0.842   176.49
1939.45    0.820   176.41
1940.45    0.797   176.33
1941.45    0.775   176.24
1942.45    0.753   176.15
1943.45    0.730   176.05
1944.45    0.707   175.95
1945.45    0.684   175.83
1946.45    0.661   175.72
1947.45    0.638   175.59
1948.45    0.615   175.45
1949.45    0.592   175.31
1950.45    0.568   175.15
1951.45    0.545   174.97
1952.45    0.521   174.78
1953.45    0.497   174.58
1954.45    0.473   174.35
1955.45    0.449   174.10
1956.45    0.425   173.81
1957.45    0.400   173.50
1958.45    0.376   173.14
1959.45    0.351   172.74
1960.45    0.327   172.27
1961.45    0.302   171.73
1962.45    0.277   171.09
1963.45    0.252   170.32
1964.45    0.228   169.39
1965.45    0.203   168.22
1966.45    0.178   166.73
1967.45    0.153   164.76
1968.45    0.128   162.03
1969.45    0.104   158.00
1970.45    0.080   151.58
1971.45    0.059   140.14
1972.45    0.042   117.64
1973.45    0.037    79.94
1974.45    0.048    47.77
1975.45    0.067    30.90
1976.45    0.090    22.04
1977.45    0.114    16.81
1978.45    0.138    13.41
1979.45    0.163    11.03
1980.45    0.187     9.27
1981.45    0.212     7.92
1982.45    0.236     6.85
1983.45    0.260     5.97
1984.45    0.283     5.25
1985.45    0.306     4.63
1986.45    0.328     4.09
1987.45    0.349     3.62
1988.45    0.369     3.21
1989.45    0.387     2.83
1990.45    0.403     2.49
1991.45    0.417     2.17
1992.45    0.428     1.87
1993.45    0.435     1.58
1994.45    0.436     1.30
1995.45    0.431     1.01
1996.45    0.418     0.72
1997.45    0.393     0.39
1998.45    0.356     0.01
1999.45    0.305   359.52
2000.45    0.241   358.80
2001.45    0.165   357.46
2002.45    0.083   353.59
2003.45    0.011   257.09
2004.45    0.089   187.99
2005.45    0.172   184.48
2006.45    0.253   183.25
2007.45    0.330   182.61
2008.45    0.405   182.21
2009.45    0.476   181.93
2010.45    0.544   181.72
2011.45    0.610   181.56
2012.45    0.672   181.43
2013.45    0.733   181.32
2014.45    0.791   181.23
2015.45    0.847   181.15
2016.45    0.901   181.08
2017.45    0.953   181.02
2018.45    1.003   180.96
2019.45    1.051   180.91
2020.45    1.099   180.86
2021.45    1.144   180.82
2022.45    1.189   180.78
2023.45    1.232   180.74
2024.45    1.273   180.71
2025.45    1.314   180.68
2026.45    1.354   180.65
2027.45    1.392   180.62
2028.45    1.430   180.59
2029.45    1.466   180.57
2030.45    1.502   180.54
2031.45    1.537   180.52
2032.45    1.571   180.50
2033.45    1.604   180.47
2034.45    1.636   180.45
2035.45    1.668   180.43
2036.45    1.699   180.42
2037.45    1.729   180.40
2038.45    1.759   180.38
2039.45    1.787   180.36
2040.45    1.816   180.35
2041.45    1.843   180.33
2042.45    1.871   180.31
2043.45    1.897   180.30
2044.45    1.923   180.28
2045.45    1.949   180.27
2046.45    1.973   180.26
2047.45    1.998   180.24
2048.45    2.022   180.23
2049.45    2.045   180.22
2050.45    2.068   180.20
2051.45    2.091   180.19
2052.45    2.113   180.18
2053.45    2.135   180.17
2054.45    2.156   180.16
2055.45    2.177   180.14
2056.45    2.197   180.13
2057.45    2.217   180.12
2058.45    2.237   180.11
2059.45    2.256   180.10
2060.45    2.275   180.09
2061.45    2.294   180.08
2062.45    2.312   180.07
2063.45    2.330   180.06
2064.45    2.347   180.05
2065.45    2.364   180.04
2066.45    2.381   180.03
2067.45    2.398   180.02
2068.45    2.414   180.01
2069.45    2.430   180.00
2070.45    2.445   179.99
2071.45    2.461   179.99
2072.45    2.476   179.98
2073.45    2.490   179.97
2074.45    2.505   179.96
2075.45    2.519   179.95
2076.45    2.533   179.94
2077.45    2.546   179.93
2078.45    2.560   179.93
2079.45    2.573   179.92
2080.45    2.585   179.91
2081.45    2.598   179.90
2082.45    2.610   179.89
2083.45    2.622   179.89
2084.45    2.634   179.88
2085.45    2.646   179.87
2086.45    2.657   179.86
2087.45    2.668   179.86
2088.45    2.679   179.85
2089.45    2.690   179.84
2090.45    2.700   179.83
2091.45    2.710   179.83
2092.45    2.720   179.82
2093.45    2.730   179.81
2094.45    2.739   179.80
2095.45    2.749   179.80
2096.45    2.758   179.79
2097.45    2.767   179.78
2098.45    2.775   179.78
2099.45    2.784   179.77
2100.45    2.792   179.76
2101.45    2.800   179.75
2102.45    2.808   179.75
2103.45    2.816   179.74
2104.45    2.823   179.73
2105.45    2.830   179.73
2106.45    2.838   179.72
2107.45    2.844   179.71
2108.45    2.851   179.71
2109.45    2.858   179.70
2110.45    2.864   179.69
2111.45    2.870   179.69
2112.45    2.876   179.68
2113.45    2.882   179.68
2114.45    2.888   179.67
2115.45    2.893   179.66
2116.45    2.899   179.66
2117.45    2.904   179.65
2118.45    2.909   179.64
2119.45    2.914   179.64
2120.45    2.918   179.63
2121.45    2.923   179.62
2122.45    2.927   179.62
2123.45    2.931   179.61
2124.45    2.935   179.61
2125.45    2.939   179.60
2126.45    2.943   179.59
2127.45    2.946   179.59
2128.45    2.949   179.58
2129.45    2.953   179.57
2130.45    2.956   179.57
2131.45    2.959   179.56
2132.45    2.961   179.56
2133.45    2.964   179.55
2134.45    2.966   179.54
2135.45    2.969   179.54
2136.45    2.971   179.53
2137.45    2.973   179.53
2138.45    2.975   179.52
2139.45    2.976   179.51
2140.45    2.978   179.51
2141.45    2.979   179.50
2142.45    2.981   179.50
2143.45    2.982   179.49
2144.45    2.983   179.48
2145.45    2.984   179.48
2146.45    2.984   179.47
2147.45    2.985   179.47
2148.45    2.985   179.46
2149.45    2.986   179.45
2150.45    2.986   179.45
2151.45    2.986   179.44
2152.45    2.986   179.44
2153.45    2.986   179.43
2154.45    2.985   179.42
2155.45    2.985   179.42
2156.45    2.984   179.41
2157.45    2.984   179.41
2158.45    2.983   179.40
2159.45    2.982   179.39
2160.45    2.981   179.39
2161.45    2.979   179.38
2162.45    2.978   179.37
2163.45    2.976   179.37
2164.45    2.975   179.36
2165.45    2.973   179.36
2166.45    2.971   179.35
2167.45    2.969   179.34
2168.45    2.967   179.34
2169.45    2.965   179.33
2170.45    2.962   179.33
2171.45    2.960   179.32
2172.45    2.957   179.31
2173.45    2.954   179.31
2174.45    2.952   179.30
2175.45    2.949   179.30
2176.45    2.945   179.29
2177.45    2.942   179.28
2178.45    2.939   179.28
2179.45    2.935   179.27
2180.45    2.932   179.26
2181.45    2.928   179.26
2182.45    2.924   179.25
2183.45    2.920   179.25
2184.45    2.916   179.24
2185.45    2.912   179.23
2186.45    2.908   179.23
2187.45    2.903   179.22
2188.45    2.899   179.21
2189.45    2.894   179.21
2190.45    2.890   179.20
2191.45    2.885   179.19
2192.45    2.880   179.19
2193.45    2.875   179.18
2194.45    2.870   179.18
2195.45    2.864   179.17
2196.45    2.859   179.16
2197.45    2.853   179.16
2198.45    2.848   179.15
2199.45    2.842   179.14
2200.45    2.836   179.14
2201.45    2.830   179.13
2202.45    2.824   179.12
2203.45    2.818   179.12
2204.45    2.811   179.11
2205.45    2.805   179.10
2206.45    2.799   179.10
2207.45    2.792   179.09
2208.45    2.785   179.08
2209.45    2.778   179.07
2210.45    2.771   179.07
2211.45    2.764   179.06
2212.45    2.757   179.05
2213.45    2.750   179.05
2214.45    2.742   179.04
2215.45    2.735   179.03
2216.45    2.727   179.03
2217.45    2.720   179.02
2218.45    2.712   179.01
2219.45    2.704   179.00
2220.45    2.696   179.00
2221.45    2.688   178.99
2222.45    2.679   178.98
2223.45    2.671   178.97
2224.45    2.663   178.97
2225.45    2.654   178.96
2226.45    2.645   178.95
2227.45    2.637   178.94
2228.45    2.628   178.94






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 18:39:27



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