Double Star Calculator - Orbit

Orbital Elements for STF2606AB
WDS: STF2606AB WDS ID/Discoverer
P: 455.000 Orbital period (years)
a: 1.081 Semi-major axis (arcseconds)
i: 82.4 Inclination (degrees)
Ω: 127.4 Longitude of ascending node (degrees)
T: 1745.700 Epoch of periastron passage (year)
e: 0.69 Eccentricity
ω: 240.5 Longitude of periastron (degrees)
Start-Year: 1797.5 Year
End-Year: 2252.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2606AB
Position: 195832.66+331638.8 Epoch-2000 right ascension and declination
WDS-ID: 19585+3317 WDS designation
Discoverer Code: STF2606AB Discover designation and components
ADS number: 13196 Aitken Double Star catalog
HD number: 189378 HD catalog number
Hipparcos number: 98315 Hipparcos catalog number
V1: 7.74 Magnitude of the primary
V2: 8.43 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2012 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Zir2015a Reference

Double Star Orbit for STF2606AB



WDS 6th Orbit including measures of STF2606AB

-- 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 STF2606AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.600   148.94
--------------------------
1797.50    0.945   128.24
1798.50    0.955   128.34
1799.50    0.964   128.44
1800.50    0.974   128.53
1801.50    0.983   128.62
1802.50    0.992   128.71
1803.50    1.001   128.80
1804.50    1.009   128.89
1805.50    1.018   128.98
1806.50    1.026   129.06
1807.50    1.034   129.15
1808.50    1.041   129.23
1809.50    1.049   129.31
1810.50    1.056   129.39
1811.50    1.063   129.47
1812.50    1.070   129.54
1813.50    1.077   129.62
1814.50    1.084   129.70
1815.50    1.090   129.77
1816.50    1.096   129.85
1817.50    1.102   129.92
1818.50    1.108   129.99
1819.50    1.114   130.06
1820.50    1.119   130.13
1821.50    1.125   130.21
1822.50    1.130   130.27
1823.50    1.135   130.34
1824.50    1.140   130.41
1825.50    1.145   130.48
1826.50    1.149   130.55
1827.50    1.154   130.61
1828.50    1.158   130.68
1829.50    1.162   130.75
1830.50    1.166   130.81
1831.50    1.170   130.88
1832.50    1.174   130.94
1833.50    1.178   131.00
1834.50    1.181   131.07
1835.50    1.185   131.13
1836.50    1.188   131.19
1837.50    1.191   131.26
1838.50    1.194   131.32
1839.50    1.197   131.38
1840.50    1.200   131.44
1841.50    1.203   131.50
1842.50    1.205   131.56
1843.50    1.208   131.63
1844.50    1.210   131.69
1845.50    1.212   131.75
1846.50    1.215   131.81
1847.50    1.217   131.87
1848.50    1.219   131.93
1849.50    1.220   131.99
1850.50    1.222   132.05
1851.50    1.224   132.10
1852.50    1.225   132.16
1853.50    1.227   132.22
1854.50    1.228   132.28
1855.50    1.229   132.34
1856.50    1.231   132.40
1857.50    1.232   132.46
1858.50    1.233   132.51
1859.50    1.234   132.57
1860.50    1.234   132.63
1861.50    1.235   132.69
1862.50    1.236   132.75
1863.50    1.236   132.81
1864.50    1.237   132.86
1865.50    1.237   132.92
1866.50    1.237   132.98
1867.50    1.238   133.04
1868.50    1.238   133.09
1869.50    1.238   133.15
1870.50    1.238   133.21
1871.50    1.238   133.27
1872.50    1.237   133.33
1873.50    1.237   133.38
1874.50    1.237   133.44
1875.50    1.237   133.50
1876.50    1.236   133.56
1877.50    1.235   133.61
1878.50    1.235   133.67
1879.50    1.234   133.73
1880.50    1.233   133.79
1881.50    1.233   133.85
1882.50    1.232   133.91
1883.50    1.231   133.96
1884.50    1.230   134.02
1885.50    1.228   134.08
1886.50    1.227   134.14
1887.50    1.226   134.20
1888.50    1.225   134.26
1889.50    1.223   134.32
1890.50    1.222   134.38
1891.50    1.220   134.44
1892.50    1.219   134.49
1893.50    1.217   134.55
1894.50    1.215   134.61
1895.50    1.214   134.67
1896.50    1.212   134.73
1897.50    1.210   134.79
1898.50    1.208   134.86
1899.50    1.206   134.92
1900.50    1.204   134.98
1901.50    1.202   135.04
1902.50    1.200   135.10
1903.50    1.197   135.16
1904.50    1.195   135.22
1905.50    1.193   135.28
1906.50    1.190   135.35
1907.50    1.188   135.41
1908.50    1.185   135.47
1909.50    1.183   135.54
1910.50    1.180   135.60
1911.50    1.178   135.66
1912.50    1.175   135.73
1913.50    1.172   135.79
1914.50    1.169   135.86
1915.50    1.166   135.92
1916.50    1.163   135.99
1917.50    1.160   136.05
1918.50    1.157   136.12
1919.50    1.154   136.18
1920.50    1.151   136.25
1921.50    1.148   136.32
1922.50    1.145   136.38
1923.50    1.141   136.45
1924.50    1.138   136.52
1925.50    1.135   136.59
1926.50    1.131   136.66
1927.50    1.128   136.73
1928.50    1.124   136.80
1929.50    1.121   136.87
1930.50    1.117   136.94
1931.50    1.113   137.01
1932.50    1.110   137.08
1933.50    1.106   137.15
1934.50    1.102   137.23
1935.50    1.098   137.30
1936.50    1.094   137.37
1937.50    1.091   137.45
1938.50    1.087   137.52
1939.50    1.083   137.60
1940.50    1.078   137.67
1941.50    1.074   137.75
1942.50    1.070   137.83
1943.50    1.066   137.90
1944.50    1.062   137.98
1945.50    1.058   138.06
1946.50    1.053   138.14
1947.50    1.049   138.22
1948.50    1.044   138.30
1949.50    1.040   138.38
1950.50    1.036   138.46
1951.50    1.031   138.55
1952.50    1.026   138.63
1953.50    1.022   138.71
1954.50    1.017   138.80
1955.50    1.013   138.89
1956.50    1.008   138.97
1957.50    1.003   139.06
1958.50    0.998   139.15
1959.50    0.994   139.24
1960.50    0.989   139.33
1961.50    0.984   139.42
1962.50    0.979   139.51
1963.50    0.974   139.60
1964.50    0.969   139.70
1965.50    0.964   139.79
1966.50    0.959   139.89
1967.50    0.954   139.98
1968.50    0.949   140.08
1969.50    0.943   140.18
1970.50    0.938   140.28
1971.50    0.933   140.38
1972.50    0.928   140.49
1973.50    0.922   140.59
1974.50    0.917   140.69
1975.50    0.912   140.80
1976.50    0.906   140.91
1977.50    0.901   141.01
1978.50    0.895   141.12
1979.50    0.890   141.24
1980.50    0.884   141.35
1981.50    0.879   141.46
1982.50    0.873   141.58
1983.50    0.867   141.69
1984.50    0.862   141.81
1985.50    0.856   141.93
1986.50    0.850   142.05
1987.50    0.844   142.18
1988.50    0.839   142.30
1989.50    0.833   142.43
1990.50    0.827   142.56
1991.50    0.821   142.69
1992.50    0.815   142.82
1993.50    0.809   142.95
1994.50    0.803   143.09
1995.50    0.797   143.23
1996.50    0.791   143.37
1997.50    0.785   143.51
1998.50    0.779   143.66
1999.50    0.773   143.80
2000.50    0.767   143.95
2001.50    0.761   144.10
2002.50    0.755   144.26
2003.50    0.748   144.42
2004.50    0.742   144.57
2005.50    0.736   144.74
2006.50    0.730   144.90
2007.50    0.723   145.07
2008.50    0.717   145.24
2009.50    0.711   145.41
2010.50    0.704   145.59
2011.50    0.698   145.77
2012.50    0.692   145.95
2013.50    0.685   146.14
2014.50    0.679   146.33
2015.50    0.672   146.52
2016.50    0.666   146.72
2017.50    0.659   146.92
2018.50    0.653   147.13
2019.50    0.646   147.34
2020.50    0.639   147.55
2021.50    0.633   147.77
2022.50    0.626   148.00
2023.50    0.620   148.22
2024.50    0.613   148.46
2025.50    0.606   148.70
2026.50    0.600   148.94
2027.50    0.593   149.19
2028.50    0.586   149.44
2029.50    0.579   149.70
2030.50    0.573   149.97
2031.50    0.566   150.24
2032.50    0.559   150.52
2033.50    0.552   150.81
2034.50    0.546   151.10
2035.50    0.539   151.40
2036.50    0.532   151.71
2037.50    0.525   152.03
2038.50    0.518   152.35
2039.50    0.512   152.69
2040.50    0.505   153.03
2041.50    0.498   153.38
2042.50    0.491   153.75
2043.50    0.484   154.12
2044.50    0.477   154.50
2045.50    0.470   154.90
2046.50    0.464   155.30
2047.50    0.457   155.72
2048.50    0.450   156.15
2049.50    0.443   156.59
2050.50    0.436   157.05
2051.50    0.429   157.53
2052.50    0.422   158.01
2053.50    0.416   158.52
2054.50    0.409   159.04
2055.50    0.402   159.58
2056.50    0.395   160.13
2057.50    0.388   160.71
2058.50    0.382   161.31
2059.50    0.375   161.93
2060.50    0.368   162.57
2061.50    0.362   163.23
2062.50    0.355   163.92
2063.50    0.348   164.64
2064.50    0.342   165.38
2065.50    0.335   166.15
2066.50    0.329   166.96
2067.50    0.322   167.79
2068.50    0.316   168.66
2069.50    0.310   169.57
2070.50    0.303   170.51
2071.50    0.297   171.49
2072.50    0.291   172.52
2073.50    0.285   173.58
2074.50    0.279   174.70
2075.50    0.273   175.86
2076.50    0.267   177.07
2077.50    0.262   178.34
2078.50    0.256   179.66
2079.50    0.251   181.04
2080.50    0.245   182.48
2081.50    0.240   183.98
2082.50    0.235   185.55
2083.50    0.230   187.18
2084.50    0.226   188.88
2085.50    0.221   190.66
2086.50    0.217   192.50
2087.50    0.213   194.41
2088.50    0.209   196.40
2089.50    0.206   198.46
2090.50    0.202   200.58
2091.50    0.199   202.78
2092.50    0.197   205.04
2093.50    0.194   207.36
2094.50    0.192   209.73
2095.50    0.190   212.16
2096.50    0.189   214.62
2097.50    0.188   217.12
2098.50    0.187   219.65
2099.50    0.186   222.19
2100.50    0.186   224.74
2101.50    0.187   227.29
2102.50    0.187   229.82
2103.50    0.188   232.34
2104.50    0.189   234.82
2105.50    0.191   237.27
2106.50    0.193   239.67
2107.50    0.195   242.02
2108.50    0.198   244.31
2109.50    0.201   246.54
2110.50    0.204   248.70
2111.50    0.207   250.80
2112.50    0.211   252.82
2113.50    0.215   254.78
2114.50    0.219   256.66
2115.50    0.223   258.47
2116.50    0.228   260.21
2117.50    0.232   261.89
2118.50    0.237   263.50
2119.50    0.242   265.04
2120.50    0.247   266.52
2121.50    0.252   267.94
2122.50    0.258   269.30
2123.50    0.263   270.60
2124.50    0.269   271.85
2125.50    0.274   273.05
2126.50    0.280   274.20
2127.50    0.286   275.31
2128.50    0.292   276.37
2129.50    0.298   277.39
2130.50    0.304   278.37
2131.50    0.310   279.31
2132.50    0.316   280.22
2133.50    0.322   281.09
2134.50    0.328   281.93
2135.50    0.334   282.74
2136.50    0.340   283.52
2137.50    0.346   284.27
2138.50    0.352   285.00
2139.50    0.358   285.70
2140.50    0.364   286.38
2141.50    0.370   287.04
2142.50    0.376   287.68
2143.50    0.382   288.30
2144.50    0.388   288.89
2145.50    0.393   289.47
2146.50    0.399   290.04
2147.50    0.405   290.59
2148.50    0.410   291.12
2149.50    0.416   291.64
2150.50    0.421   292.14
2151.50    0.427   292.63
2152.50    0.432   293.12
2153.50    0.437   293.58
2154.50    0.442   294.04
2155.50    0.447   294.49
2156.50    0.452   294.93
2157.50    0.456   295.36
2158.50    0.461   295.78
2159.50    0.465   296.19
2160.50    0.469   296.60
2161.50    0.473   297.00
2162.50    0.477   297.39
2163.50    0.480   297.77
2164.50    0.484   298.16
2165.50    0.487   298.53
2166.50    0.489   298.90
2167.50    0.492   299.27
2168.50    0.494   299.63
2169.50    0.496   300.00
2170.50    0.497   300.35
2171.50    0.499   300.71
2172.50    0.499   301.07
2173.50    0.500   301.42
2174.50    0.499   301.78
2175.50    0.499   302.13
2176.50    0.498   302.49
2177.50    0.496   302.85
2178.50    0.494   303.21
2179.50    0.491   303.57
2180.50    0.487   303.94
2181.50    0.483   304.32
2182.50    0.477   304.70
2183.50    0.471   305.10
2184.50    0.464   305.50
2185.50    0.456   305.92
2186.50    0.447   306.35
2187.50    0.437   306.80
2188.50    0.426   307.28
2189.50    0.413   307.78
2190.50    0.399   308.32
2191.50    0.383   308.90
2192.50    0.366   309.53
2193.50    0.348   310.22
2194.50    0.328   311.00
2195.50    0.306   311.88
2196.50    0.282   312.91
2197.50    0.258   314.12
2198.50    0.231   315.61
2199.50    0.204   317.48
2200.50    0.175   319.96
2201.50    0.146   323.42
2202.50    0.117   328.60
2203.50    0.088   337.20
2204.50    0.063   353.25
2205.50    0.048    24.00
2206.50    0.052    62.25
2207.50    0.073    86.20
2208.50    0.100    98.43
2209.50    0.129   105.30
2210.50    0.159   109.61
2211.50    0.189   112.56
2212.50    0.218   114.71
2213.50    0.247   116.34
2214.50    0.276   117.64
2215.50    0.304   118.69
2216.50    0.331   119.57
2217.50    0.358   120.32
2218.50    0.383   120.97
2219.50    0.409   121.53
2220.50    0.433   122.03
2221.50    0.457   122.48
2222.50    0.480   122.88
2223.50    0.502   123.25
2224.50    0.524   123.59
2225.50    0.545   123.89
2226.50    0.566   124.18
2227.50    0.586   124.45
2228.50    0.606   124.70
2229.50    0.624   124.93
2230.50    0.643   125.15
2231.50    0.661   125.36
2232.50    0.678   125.56
2233.50    0.695   125.75
2234.50    0.712   125.92
2235.50    0.728   126.10
2236.50    0.743   126.26
2237.50    0.759   126.42
2238.50    0.773   126.57
2239.50    0.788   126.71
2240.50    0.802   126.85
2241.50    0.816   126.99
2242.50    0.829   127.12
2243.50    0.842   127.24
2244.50    0.854   127.37
2245.50    0.867   127.49
2246.50    0.879   127.60
2247.50    0.890   127.72
2248.50    0.902   127.83
2249.50    0.913   127.93
2250.50    0.924   128.04
2251.50    0.934   128.14






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 18:10:51



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