Double Star Calculator - Orbit

Orbital Elements for STF305AB

WDS:	STF305AB	WDS ID/Discoverer
P:	531.490	Orbital period (years)
a:	2.307	Semi-major axis (arcseconds)
i:	111.1	Inclination (degrees)
Ω:	133.0	Longitude of ascending node (degrees)
T:	1761.810	Epoch of periastron passage (year)
e:	0.619	Eccentricity
ω:	18.4	Longitude of periastron (degrees)
Start-Year:	1759.255	Year
End-Year:	2290.745	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF305AB
Position:	024727.35+192220.0	Epoch-2000 right ascension and declination
WDS-ID:	02475+1922	WDS designation
Discoverer Code:	STF305AB	Discover designation and components
ADS number:	2122	Aitken Double Star catalog
HD number:	17332	HD catalog number
Hipparcos number:	13027	Hipparcos catalog number
V1:	7.52	Magnitude of the primary
V2:	8.25	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2011	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Msn2014b	Reference

Double Star Orbit for STF305AB

WDS 6th Orbit including measures of STF305AB

-- 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 STF305AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    3.573   306.26
--------------------------
1759.26    0.874   129.71
1760.26    0.862   128.36
1761.26    0.848   126.96
1762.26    0.833   125.52
1763.26    0.816   124.02
1764.26    0.798   122.46
1765.26    0.778   120.82
1766.26    0.757   119.09
1767.26    0.735   117.26
1768.26    0.713   115.32
1769.26    0.689   113.24
1770.26    0.665   111.01
1771.26    0.640   108.62
1772.26    0.615   106.03
1773.26    0.591   103.23
1774.26    0.566   100.18
1775.26    0.543    96.86
1776.26    0.521    93.26
1777.26    0.499    89.33
1778.26    0.480    85.08
1779.26    0.463    80.49
1780.26    0.448    75.57
1781.26    0.436    70.35
1782.26    0.428    64.88
1783.26    0.423    59.23
1784.26    0.421    53.50
1785.26    0.424    47.78
1786.26    0.430    42.17
1787.26    0.439    36.77
1788.26    0.452    31.63
1789.26    0.468    26.81
1790.26    0.487    22.33
1791.26    0.508    18.21
1792.26    0.531    14.42
1793.26    0.555    10.96
1794.26    0.582     7.80
1795.26    0.609     4.93
1796.26    0.637     2.30
1797.26    0.666   359.90
1798.26    0.696   357.70
1799.26    0.727   355.69
1800.26    0.758   353.84
1801.26    0.789   352.13
1802.26    0.820   350.56
1803.26    0.852   349.10
1804.26    0.884   347.74
1805.26    0.916   346.48
1806.26    0.947   345.31
1807.26    0.979   344.21
1808.26    1.011   343.18
1809.26    1.043   342.21
1810.26    1.074   341.30
1811.26    1.106   340.45
1812.26    1.137   339.64
1813.26    1.169   338.87
1814.26    1.200   338.14
1815.26    1.230   337.45
1816.26    1.261   336.79
1817.26    1.292   336.17
1818.26    1.322   335.57
1819.26    1.352   335.00
1820.26    1.382   334.46
1821.26    1.412   333.93
1822.26    1.441   333.43
1823.26    1.470   332.95
1824.26    1.499   332.49
1825.26    1.528   332.04
1826.26    1.556   331.62
1827.26    1.584   331.20
1828.26    1.612   330.80
1829.26    1.640   330.42
1830.26    1.668   330.04
1831.26    1.695   329.68
1832.26    1.722   329.33
1833.26    1.749   329.00
1834.26    1.775   328.67
1835.26    1.801   328.35
1836.26    1.828   328.04
1837.26    1.853   327.74
1838.26    1.879   327.45
1839.26    1.904   327.16
1840.26    1.929   326.88
1841.26    1.954   326.61
1842.26    1.979   326.35
1843.26    2.003   326.09
1844.26    2.027   325.84
1845.26    2.051   325.60
1846.26    2.075   325.36
1847.26    2.098   325.12
1848.26    2.121   324.89
1849.26    2.144   324.67
1850.26    2.167   324.45
1851.26    2.190   324.24
1852.26    2.212   324.03
1853.26    2.234   323.82
1854.26    2.256   323.62
1855.26    2.277   323.42
1856.26    2.299   323.22
1857.26    2.320   323.03
1858.26    2.341   322.84
1859.26    2.362   322.66
1860.26    2.382   322.48
1861.26    2.403   322.30
1862.26    2.423   322.13
1863.26    2.443   321.95
1864.26    2.462   321.78
1865.26    2.482   321.62
1866.26    2.501   321.45
1867.26    2.520   321.29
1868.26    2.539   321.13
1869.26    2.558   320.98
1870.26    2.576   320.82
1871.26    2.595   320.67
1872.26    2.613   320.52
1873.26    2.631   320.37
1874.26    2.648   320.22
1875.26    2.666   320.08
1876.26    2.683   319.94
1877.26    2.700   319.80
1878.26    2.717   319.66
1879.26    2.734   319.52
1880.26    2.751   319.38
1881.26    2.767   319.25
1882.26    2.783   319.12
1883.26    2.799   318.99
1884.26    2.815   318.86
1885.26    2.831   318.73
1886.26    2.846   318.60
1887.26    2.862   318.48
1888.26    2.877   318.35
1889.26    2.892   318.23
1890.26    2.906   318.11
1891.26    2.921   317.99
1892.26    2.935   317.87
1893.26    2.950   317.75
1894.26    2.964   317.64
1895.26    2.978   317.52
1896.26    2.991   317.41
1897.26    3.005   317.29
1898.26    3.018   317.18
1899.26    3.031   317.07
1900.26    3.044   316.96
1901.26    3.057   316.85
1902.26    3.070   316.74
1903.26    3.083   316.63
1904.26    3.095   316.53
1905.26    3.107   316.42
1906.26    3.119   316.32
1907.26    3.131   316.21
1908.26    3.143   316.11
1909.26    3.155   316.01
1910.26    3.166   315.90
1911.26    3.177   315.80
1912.26    3.188   315.70
1913.26    3.199   315.60
1914.26    3.210   315.50
1915.26    3.221   315.40
1916.26    3.231   315.31
1917.26    3.242   315.21
1918.26    3.252   315.11
1919.26    3.262   315.02
1920.26    3.272   314.92
1921.26    3.282   314.83
1922.26    3.291   314.73
1923.26    3.301   314.64
1924.26    3.310   314.54
1925.26    3.319   314.45
1926.26    3.328   314.36
1927.26    3.337   314.27
1928.26    3.346   314.18
1929.26    3.354   314.09
1930.26    3.363   313.99
1931.26    3.371   313.90
1932.26    3.379   313.82
1933.26    3.387   313.73
1934.26    3.395   313.64
1935.26    3.403   313.55
1936.26    3.410   313.46
1937.26    3.418   313.37
1938.26    3.425   313.29
1939.26    3.432   313.20
1940.26    3.439   313.11
1941.26    3.446   313.03
1942.26    3.453   312.94
1943.26    3.460   312.86
1944.26    3.466   312.77
1945.26    3.473   312.69
1946.26    3.479   312.60
1947.26    3.485   312.52
1948.26    3.491   312.44
1949.26    3.497   312.35
1950.26    3.502   312.27
1951.26    3.508   312.19
1952.26    3.513   312.10
1953.26    3.519   312.02
1954.26    3.524   311.94
1955.26    3.529   311.86
1956.26    3.534   311.77
1957.26    3.538   311.69
1958.26    3.543   311.61
1959.26    3.548   311.53
1960.26    3.552   311.45
1961.26    3.556   311.37
1962.26    3.560   311.29
1963.26    3.564   311.21
1964.26    3.568   311.13
1965.26    3.572   311.05
1966.26    3.576   310.97
1967.26    3.579   310.89
1968.26    3.582   310.81
1969.26    3.586   310.73
1970.26    3.589   310.65
1971.26    3.592   310.57
1972.26    3.595   310.49
1973.26    3.597   310.41
1974.26    3.600   310.34
1975.26    3.603   310.26
1976.26    3.605   310.18
1977.26    3.607   310.10
1978.26    3.609   310.02
1979.26    3.611   309.94
1980.26    3.613   309.87
1981.26    3.615   309.79
1982.26    3.617   309.71
1983.26    3.618   309.63
1984.26    3.620   309.55
1985.26    3.621   309.48
1986.26    3.622   309.40
1987.26    3.623   309.32
1988.26    3.624   309.24
1989.26    3.625   309.16
1990.26    3.626   309.09
1991.26    3.626   309.01
1992.26    3.627   308.93
1993.26    3.627   308.85
1994.26    3.627   308.78
1995.26    3.627   308.70
1996.26    3.627   308.62
1997.26    3.627   308.55
1998.26    3.627   308.47
1999.26    3.627   308.39
2000.26    3.626   308.31
2001.26    3.626   308.24
2002.26    3.625   308.16
2003.26    3.624   308.08
2004.26    3.623   308.00
2005.26    3.622   307.92
2006.26    3.621   307.85
2007.26    3.620   307.77
2008.26    3.618   307.69
2009.26    3.617   307.61
2010.26    3.615   307.54
2011.26    3.613   307.46
2012.26    3.612   307.38
2013.26    3.610   307.30
2014.26    3.608   307.22
2015.26    3.605   307.14
2016.26    3.603   307.07
2017.26    3.601   306.99
2018.26    3.598   306.91
2019.26    3.596   306.83
2020.26    3.593   306.75
2021.26    3.590   306.67
2022.26    3.587   306.59
2023.26    3.584   306.51
2024.26    3.581   306.43
2025.26    3.577   306.35
2026.26    3.574   306.27
2027.26    3.570   306.20
2028.26    3.567   306.12
2029.26    3.563   306.03
2030.26    3.559   305.95
2031.26    3.555   305.87
2032.26    3.551   305.79
2033.26    3.547   305.71
2034.26    3.543   305.63
2035.26    3.538   305.55
2036.26    3.534   305.47
2037.26    3.529   305.39
2038.26    3.524   305.30
2039.26    3.520   305.22
2040.26    3.515   305.14
2041.26    3.510   305.06
2042.26    3.504   304.97
2043.26    3.499   304.89
2044.26    3.494   304.81
2045.26    3.488   304.72
2046.26    3.483   304.64
2047.26    3.477   304.56
2048.26    3.471   304.47
2049.26    3.465   304.39
2050.26    3.459   304.30
2051.26    3.453   304.22
2052.26    3.447   304.13
2053.26    3.440   304.05
2054.26    3.434   303.96
2055.26    3.427   303.87
2056.26    3.421   303.79
2057.26    3.414   303.70
2058.26    3.407   303.61
2059.26    3.400   303.52
2060.26    3.393   303.43
2061.26    3.386   303.35
2062.26    3.378   303.26
2063.26    3.371   303.17
2064.26    3.363   303.08
2065.26    3.356   302.99
2066.26    3.348   302.90
2067.26    3.340   302.80
2068.26    3.332   302.71
2069.26    3.324   302.62
2070.26    3.316   302.53
2071.26    3.308   302.44
2072.26    3.299   302.34
2073.26    3.291   302.25
2074.26    3.282   302.15
2075.26    3.273   302.06
2076.26    3.265   301.96
2077.26    3.256   301.87
2078.26    3.247   301.77
2079.26    3.237   301.67
2080.26    3.228   301.58
2081.26    3.219   301.48
2082.26    3.209   301.38
2083.26    3.200   301.28
2084.26    3.190   301.18
2085.26    3.180   301.08
2086.26    3.170   300.98
2087.26    3.160   300.88
2088.26    3.150   300.78
2089.26    3.140   300.67
2090.26    3.130   300.57
2091.26    3.119   300.46
2092.26    3.109   300.36
2093.26    3.098   300.25
2094.26    3.088   300.15
2095.26    3.077   300.04
2096.26    3.066   299.93
2097.26    3.055   299.82
2098.26    3.044   299.71
2099.26    3.032   299.60
2100.26    3.021   299.49
2101.26    3.009   299.38
2102.26    2.998   299.27
2103.26    2.986   299.15
2104.26    2.974   299.04
2105.26    2.962   298.92
2106.26    2.950   298.81
2107.26    2.938   298.69
2108.26    2.926   298.57
2109.26    2.914   298.45
2110.26    2.901   298.33
2111.26    2.889   298.21
2112.26    2.876   298.08
2113.26    2.863   297.96
2114.26    2.850   297.84
2115.26    2.837   297.71
2116.26    2.824   297.58
2117.26    2.811   297.45
2118.26    2.798   297.33
2119.26    2.785   297.19
2120.26    2.771   297.06
2121.26    2.757   296.93
2122.26    2.744   296.79
2123.26    2.730   296.66
2124.26    2.716   296.52
2125.26    2.702   296.38
2126.26    2.688   296.24
2127.26    2.674   296.10
2128.26    2.659   295.96
2129.26    2.645   295.81
2130.26    2.630   295.66
2131.26    2.615   295.52
2132.26    2.601   295.37
2133.26    2.586   295.21
2134.26    2.571   295.06
2135.26    2.556   294.91
2136.26    2.541   294.75
2137.26    2.525   294.59
2138.26    2.510   294.43
2139.26    2.494   294.27
2140.26    2.479   294.10
2141.26    2.463   293.94
2142.26    2.447   293.77
2143.26    2.431   293.59
2144.26    2.415   293.42
2145.26    2.399   293.25
2146.26    2.383   293.07
2147.26    2.367   292.89
2148.26    2.350   292.70
2149.26    2.334   292.52
2150.26    2.317   292.33
2151.26    2.300   292.14
2152.26    2.283   291.94
2153.26    2.266   291.75
2154.26    2.249   291.55
2155.26    2.232   291.34
2156.26    2.215   291.14
2157.26    2.197   290.93
2158.26    2.180   290.72
2159.26    2.162   290.50
2160.26    2.145   290.28
2161.26    2.127   290.06
2162.26    2.109   289.83
2163.26    2.091   289.60
2164.26    2.073   289.36
2165.26    2.055   289.12
2166.26    2.037   288.88
2167.26    2.018   288.63
2168.26    2.000   288.38
2169.26    1.981   288.12
2170.26    1.963   287.86
2171.26    1.944   287.59
2172.26    1.925   287.32
2173.26    1.906   287.04
2174.26    1.887   286.76
2175.26    1.868   286.47
2176.26    1.849   286.17
2177.26    1.830   285.87
2178.26    1.810   285.57
2179.26    1.791   285.25
2180.26    1.771   284.93
2181.26    1.752   284.60
2182.26    1.732   284.27
2183.26    1.712   283.92
2184.26    1.692   283.57
2185.26    1.672   283.21
2186.26    1.652   282.84
2187.26    1.632   282.46
2188.26    1.612   282.08
2189.26    1.592   281.68
2190.26    1.572   281.27
2191.26    1.551   280.85
2192.26    1.531   280.42
2193.26    1.511   279.98
2194.26    1.490   279.53
2195.26    1.469   279.07
2196.26    1.449   278.59
2197.26    1.428   278.09
2198.26    1.408   277.59
2199.26    1.387   277.07
2200.26    1.366   276.53
2201.26    1.345   275.97
2202.26    1.325   275.40
2203.26    1.304   274.81
2204.26    1.283   274.20
2205.26    1.262   273.57
2206.26    1.241   272.92
2207.26    1.221   272.25
2208.26    1.200   271.55
2209.26    1.179   270.83
2210.26    1.158   270.09
2211.26    1.138   269.31
2212.26    1.117   268.51
2213.26    1.097   267.68
2214.26    1.076   266.81
2215.26    1.056   265.92
2216.26    1.036   264.98
2217.26    1.016   264.02
2218.26    0.996   263.01
2219.26    0.976   261.96
2220.26    0.956   260.87
2221.26    0.937   259.73
2222.26    0.918   258.54
2223.26    0.899   257.31
2224.26    0.880   256.02
2225.26    0.862   254.67
2226.26    0.844   253.27
2227.26    0.826   251.81
2228.26    0.809   250.28
2229.26    0.792   248.69
2230.26    0.776   247.03
2231.26    0.760   245.30
2232.26    0.745   243.50
2233.26    0.730   241.62
2234.26    0.716   239.67
2235.26    0.702   237.65
2236.26    0.690   235.54
2237.26    0.678   233.36
2238.26    0.667   231.11
2239.26    0.657   228.78
2240.26    0.648   226.39
2241.26    0.639   223.92
2242.26    0.632   221.40
2243.26    0.626   218.83
2244.26    0.621   216.21
2245.26    0.617   213.54
2246.26    0.614   210.85
2247.26    0.613   208.14
2248.26    0.612   205.43
2249.26    0.613   202.71
2250.26    0.614   200.00
2251.26    0.617   197.31
2252.26    0.621   194.65
2253.26    0.626   192.02
2254.26    0.632   189.45
2255.26    0.639   186.92
2256.26    0.646   184.45
2257.26    0.655   182.04
2258.26    0.664   179.70
2259.26    0.674   177.42
2260.26    0.685   175.21
2261.26    0.696   173.07
2262.26    0.707   171.00
2263.26    0.719   169.00
2264.26    0.732   167.06
2265.26    0.744   165.19
2266.26    0.757   163.38
2267.26    0.769   161.63
2268.26    0.782   159.93
2269.26    0.795   158.29
2270.26    0.807   156.70
2271.26    0.819   155.16
2272.26    0.831   153.66
2273.26    0.842   152.20
2274.26    0.853   150.78
2275.26    0.863   149.40
2276.26    0.872   148.04
2277.26    0.881   146.72
2278.26    0.888   145.42
2279.26    0.895   144.13
2280.26    0.901   142.87
2281.26    0.905   141.62
2282.26    0.908   140.38
2283.26    0.910   139.15
2284.26    0.910   137.92
2285.26    0.909   136.69
2286.26    0.907   135.45
2287.26    0.902   134.21
2288.26    0.896   132.95
2289.26    0.888   131.67
2290.26    0.879   130.36

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 15:04:44