Double Star Calculator - Orbit

Orbital Elements for STF2909AB
WDS: STF2909AB WDS ID/Discoverer
P: 426.652 Orbital period (years)
a: 3.17843 Semi-major axis (arcseconds)
i: 141.983 Inclination (degrees)
Ω: 137.98 Longitude of ascending node (degrees)
T: 1987.288 Epoch of periastron passage (year)
e: 0.3001 Eccentricity
ω: 284.866 Longitude of periastron (degrees)
Start-Year: 1811.67415 Year
End-Year: 2238.32585 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2909AB
Position: 222849.81-000112.2 Epoch-2000 right ascension and declination
WDS-ID: 22288-0001 WDS designation
Discoverer Code: STF2909AB Discover designation and components
ADS number: 15971 Aitken Double Star catalog
HD number: 213052 HD catalog number
Hipparcos number: 110960 Hipparcos catalog number
V1: 4.34 Magnitude of the primary
V2: 4.49 Magnitude of the secondary
Equinox: Equinox
Date: 2015 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: Izm2019 Reference

Double Star Orbit for STF2909AB



WDS 6th Orbit including measures of STF2909AB

-- 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 STF2909AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.472   150.60
--------------------------
1811.67    3.465     8.39
1812.67    3.468     7.86
1813.67    3.471     7.33
1814.67    3.474     6.80
1815.67    3.477     6.27
1816.67    3.480     5.74
1817.67    3.483     5.21
1818.67    3.485     4.68
1819.67    3.488     4.16
1820.67    3.491     3.63
1821.67    3.493     3.10
1822.67    3.495     2.58
1823.67    3.498     2.05
1824.67    3.500     1.53
1825.67    3.502     1.01
1826.67    3.504     0.49
1827.67    3.506   359.97
1828.67    3.508   359.44
1829.67    3.509   358.92
1830.67    3.511   358.40
1831.67    3.512   357.88
1832.67    3.514   357.37
1833.67    3.515   356.85
1834.67    3.516   356.33
1835.67    3.517   355.81
1836.67    3.518   355.29
1837.67    3.518   354.77
1838.67    3.519   354.26
1839.67    3.519   353.74
1840.67    3.520   353.22
1841.67    3.520   352.71
1842.67    3.520   352.19
1843.67    3.520   351.67
1844.67    3.520   351.15
1845.67    3.519   350.64
1846.67    3.519   350.12
1847.67    3.518   349.60
1848.67    3.517   349.08
1849.67    3.516   348.57
1850.67    3.515   348.05
1851.67    3.513   347.53
1852.67    3.512   347.01
1853.67    3.510   346.49
1854.67    3.508   345.97
1855.67    3.506   345.45
1856.67    3.504   344.93
1857.67    3.501   344.41
1858.67    3.499   343.88
1859.67    3.496   343.36
1860.67    3.493   342.83
1861.67    3.490   342.31
1862.67    3.486   341.78
1863.67    3.483   341.26
1864.67    3.479   340.73
1865.67    3.475   340.20
1866.67    3.471   339.67
1867.67    3.466   339.13
1868.67    3.462   338.60
1869.67    3.457   338.06
1870.67    3.452   337.53
1871.67    3.446   336.99
1872.67    3.441   336.45
1873.67    3.435   335.91
1874.67    3.429   335.36
1875.67    3.423   334.82
1876.67    3.416   334.27
1877.67    3.410   333.72
1878.67    3.403   333.17
1879.67    3.395   332.61
1880.67    3.388   332.06
1881.67    3.380   331.50
1882.67    3.372   330.93
1883.67    3.364   330.37
1884.67    3.355   329.80
1885.67    3.347   329.23
1886.67    3.338   328.66
1887.67    3.328   328.08
1888.67    3.319   327.50
1889.67    3.309   326.92
1890.67    3.299   326.33
1891.67    3.288   325.74
1892.67    3.278   325.15
1893.67    3.267   324.55
1894.67    3.255   323.94
1895.67    3.244   323.34
1896.67    3.232   322.73
1897.67    3.220   322.11
1898.67    3.207   321.49
1899.67    3.195   320.87
1900.67    3.182   320.24
1901.67    3.168   319.60
1902.67    3.155   318.96
1903.67    3.141   318.31
1904.67    3.126   317.66
1905.67    3.112   317.00
1906.67    3.097   316.34
1907.67    3.082   315.67
1908.67    3.066   314.99
1909.67    3.051   314.30
1910.67    3.035   313.61
1911.67    3.018   312.91
1912.67    3.002   312.20
1913.67    2.985   311.49
1914.67    2.967   310.77
1915.67    2.950   310.03
1916.67    2.932   309.29
1917.67    2.914   308.54
1918.67    2.895   307.78
1919.67    2.877   307.02
1920.67    2.858   306.24
1921.67    2.838   305.45
1922.67    2.819   304.65
1923.67    2.799   303.83
1924.67    2.779   303.01
1925.67    2.758   302.17
1926.67    2.737   301.33
1927.67    2.716   300.46
1928.67    2.695   299.59
1929.67    2.674   298.70
1930.67    2.652   297.80
1931.67    2.630   296.88
1932.67    2.608   295.94
1933.67    2.586   294.99
1934.67    2.563   294.03
1935.67    2.541   293.04
1936.67    2.518   292.04
1937.67    2.495   291.02
1938.67    2.472   289.98
1939.67    2.449   288.93
1940.67    2.425   287.85
1941.67    2.402   286.75
1942.67    2.379   285.63
1943.67    2.355   284.48
1944.67    2.332   283.32
1945.67    2.308   282.13
1946.67    2.285   280.91
1947.67    2.261   279.67
1948.67    2.238   278.41
1949.67    2.215   277.11
1950.67    2.192   275.79
1951.67    2.169   274.45
1952.67    2.146   273.07
1953.67    2.124   271.66
1954.67    2.102   270.23
1955.67    2.080   268.76
1956.67    2.058   267.27
1957.67    2.037   265.74
1958.67    2.017   264.18
1959.67    1.997   262.59
1960.67    1.977   260.97
1961.67    1.958   259.31
1962.67    1.940   257.63
1963.67    1.922   255.91
1964.67    1.905   254.16
1965.67    1.889   252.38
1966.67    1.874   250.57
1967.67    1.859   248.73
1968.67    1.845   246.86
1969.67    1.833   244.97
1970.67    1.821   243.05
1971.67    1.810   241.10
1972.67    1.800   239.14
1973.67    1.792   237.15
1974.67    1.784   235.15
1975.67    1.777   233.12
1976.67    1.772   231.09
1977.67    1.768   229.05
1978.67    1.765   226.99
1979.67    1.763   224.93
1980.67    1.762   222.87
1981.67    1.763   220.81
1982.67    1.765   218.75
1983.67    1.768   216.70
1984.67    1.772   214.65
1985.67    1.777   212.62
1986.67    1.783   210.59
1987.67    1.790   208.59
1988.67    1.799   206.60
1989.67    1.808   204.63
1990.67    1.819   202.68
1991.67    1.830   200.75
1992.67    1.842   198.85
1993.67    1.855   196.98
1994.67    1.869   195.13
1995.67    1.884   193.31
1996.67    1.899   191.52
1997.67    1.915   189.76
1998.67    1.931   188.03
1999.67    1.948   186.32
2000.67    1.966   184.65
2001.67    1.984   183.01
2002.67    2.003   181.40
2003.67    2.021   179.82
2004.67    2.041   178.26
2005.67    2.060   176.74
2006.67    2.080   175.24
2007.67    2.100   173.78
2008.67    2.120   172.34
2009.67    2.140   170.93
2010.67    2.160   169.54
2011.67    2.181   168.18
2012.67    2.201   166.84
2013.67    2.221   165.53
2014.67    2.242   164.25
2015.67    2.262   162.99
2016.67    2.282   161.74
2017.67    2.302   160.52
2018.67    2.322   159.33
2019.67    2.342   158.15
2020.67    2.362   156.99
2021.67    2.381   155.85
2022.67    2.400   154.73
2023.67    2.419   153.63
2024.67    2.438   152.54
2025.67    2.457   151.47
2026.67    2.475   150.42
2027.67    2.493   149.38
2028.67    2.511   148.36
2029.67    2.528   147.35
2030.67    2.545   146.35
2031.67    2.562   145.37
2032.67    2.579   144.40
2033.67    2.595   143.44
2034.67    2.611   142.50
2035.67    2.627   141.56
2036.67    2.642   140.64
2037.67    2.657   139.73
2038.67    2.672   138.83
2039.67    2.686   137.93
2040.67    2.700   137.05
2041.67    2.714   136.18
2042.67    2.727   135.31
2043.67    2.740   134.45
2044.67    2.753   133.60
2045.67    2.766   132.76
2046.67    2.778   131.93
2047.67    2.790   131.10
2048.67    2.801   130.28
2049.67    2.812   129.47
2050.67    2.823   128.66
2051.67    2.834   127.86
2052.67    2.844   127.07
2053.67    2.854   126.28
2054.67    2.864   125.50
2055.67    2.874   124.72
2056.67    2.883   123.94
2057.67    2.892   123.18
2058.67    2.900   122.41
2059.67    2.909   121.65
2060.67    2.917   120.90
2061.67    2.925   120.15
2062.67    2.933   119.40
2063.67    2.940   118.66
2064.67    2.947   117.92
2065.67    2.954   117.18
2066.67    2.961   116.45
2067.67    2.967   115.72
2068.67    2.973   114.99
2069.67    2.979   114.27
2070.67    2.985   113.55
2071.67    2.991   112.83
2072.67    2.996   112.12
2073.67    3.002   111.41
2074.67    3.007   110.70
2075.67    3.011   109.99
2076.67    3.016   109.28
2077.67    3.021   108.58
2078.67    3.025   107.88
2079.67    3.029   107.18
2080.67    3.033   106.48
2081.67    3.037   105.79
2082.67    3.041   105.09
2083.67    3.044   104.40
2084.67    3.048   103.71
2085.67    3.051   103.02
2086.67    3.054   102.34
2087.67    3.057   101.65
2088.67    3.060   100.97
2089.67    3.063   100.28
2090.67    3.066    99.60
2091.67    3.069    98.92
2092.67    3.071    98.24
2093.67    3.073    97.56
2094.67    3.076    96.88
2095.67    3.078    96.21
2096.67    3.080    95.53
2097.67    3.082    94.86
2098.67    3.084    94.18
2099.67    3.086    93.51
2100.67    3.088    92.84
2101.67    3.090    92.17
2102.67    3.091    91.49
2103.67    3.093    90.82
2104.67    3.095    90.16
2105.67    3.096    89.49
2106.67    3.098    88.82
2107.67    3.099    88.15
2108.67    3.101    87.48
2109.67    3.102    86.82
2110.67    3.104    86.15
2111.67    3.105    85.49
2112.67    3.106    84.82
2113.67    3.107    84.16
2114.67    3.109    83.50
2115.67    3.110    82.84
2116.67    3.111    82.17
2117.67    3.112    81.51
2118.67    3.114    80.85
2119.67    3.115    80.19
2120.67    3.116    79.53
2121.67    3.117    78.87
2122.67    3.119    78.21
2123.67    3.120    77.55
2124.67    3.121    76.90
2125.67    3.122    76.24
2126.67    3.124    75.58
2127.67    3.125    74.92
2128.67    3.126    74.27
2129.67    3.127    73.61
2130.67    3.129    72.96
2131.67    3.130    72.30
2132.67    3.131    71.65
2133.67    3.133    71.00
2134.67    3.134    70.35
2135.67    3.136    69.69
2136.67    3.137    69.04
2137.67    3.139    68.39
2138.67    3.140    67.74
2139.67    3.142    67.09
2140.67    3.143    66.44
2141.67    3.145    65.80
2142.67    3.147    65.15
2143.67    3.148    64.50
2144.67    3.150    63.86
2145.67    3.152    63.21
2146.67    3.154    62.57
2147.67    3.156    61.92
2148.67    3.158    61.28
2149.67    3.160    60.64
2150.67    3.162    60.00
2151.67    3.164    59.36
2152.67    3.166    58.72
2153.67    3.168    58.08
2154.67    3.170    57.44
2155.67    3.173    56.80
2156.67    3.175    56.17
2157.67    3.177    55.53
2158.67    3.180    54.90
2159.67    3.182    54.26
2160.67    3.185    53.63
2161.67    3.187    53.00
2162.67    3.190    52.37
2163.67    3.192    51.74
2164.67    3.195    51.11
2165.67    3.198    50.49
2166.67    3.201    49.86
2167.67    3.204    49.24
2168.67    3.206    48.61
2169.67    3.209    47.99
2170.67    3.212    47.37
2171.67    3.215    46.75
2172.67    3.219    46.13
2173.67    3.222    45.51
2174.67    3.225    44.90
2175.67    3.228    44.28
2176.67    3.231    43.67
2177.67    3.235    43.05
2178.67    3.238    42.44
2179.67    3.241    41.83
2180.67    3.245    41.22
2181.67    3.248    40.61
2182.67    3.252    40.01
2183.67    3.255    39.40
2184.67    3.259    38.80
2185.67    3.263    38.20
2186.67    3.266    37.60
2187.67    3.270    37.00
2188.67    3.274    36.40
2189.67    3.278    35.80
2190.67    3.281    35.20
2191.67    3.285    34.61
2192.67    3.289    34.02
2193.67    3.293    33.43
2194.67    3.297    32.84
2195.67    3.301    32.25
2196.67    3.305    31.66
2197.67    3.309    31.07
2198.67    3.313    30.49
2199.67    3.317    29.91
2200.67    3.321    29.32
2201.67    3.325    28.74
2202.67    3.329    28.17
2203.67    3.333    27.59
2204.67    3.337    27.01
2205.67    3.341    26.44
2206.67    3.345    25.86
2207.67    3.349    25.29
2208.67    3.353    24.72
2209.67    3.357    24.15
2210.67    3.361    23.59
2211.67    3.365    23.02
2212.67    3.369    22.45
2213.67    3.373    21.89
2214.67    3.377    21.33
2215.67    3.381    20.77
2216.67    3.386    20.21
2217.67    3.390    19.65
2218.67    3.393    19.09
2219.67    3.397    18.54
2220.67    3.401    17.98
2221.67    3.405    17.43
2222.67    3.409    16.88
2223.67    3.413    16.33
2224.67    3.417    15.78
2225.67    3.421    15.23
2226.67    3.424    14.68
2227.67    3.428    14.14
2228.67    3.432    13.59
2229.67    3.436    13.05
2230.67    3.439    12.51
2231.67    3.443    11.97
2232.67    3.446    11.43
2233.67    3.450    10.89
2234.67    3.453    10.35
2235.67    3.456     9.81
2236.67    3.460     9.28
2237.67    3.463     8.74






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 18:40:31



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