Double Star Calculator - Orbit

Orbital Elements for STF881AB
WDS: STF881AB WDS ID/Discoverer
P: 503.000 Orbital period (years)
a: 0.683 Semi-major axis (arcseconds)
i: 43.7 Inclination (degrees)
Ω: 61.2 Longitude of ascending node (degrees)
T: 1650.000 Epoch of periastron passage (year)
e: 0.518 Eccentricity
ω: 233.8 Longitude of periastron (degrees)
Start-Year: 1773.5 Year
End-Year: 2276.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF881AB
Position: 062203.57+592219.5 Epoch-2000 right ascension and declination
WDS-ID: 06221+5922 WDS designation
Discoverer Code: STF881AB Discover designation and components
ADS number: 4950 Aitken Double Star catalog
HD number: 43812 HD catalog number
Hipparcos number: 30272 Hipparcos catalog number
V1: 6.13 Magnitude of the primary
V2: 7.71 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2007 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: Zir2013a Reference

Double Star Orbit for STF881AB



WDS 6th Orbit including measures of STF881AB

-- 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 STF881AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.610   153.84
--------------------------
1773.50    0.821    71.77
1774.50    0.824    72.07
1775.50    0.826    72.38
1776.50    0.829    72.68
1777.50    0.831    72.98
1778.50    0.833    73.28
1779.50    0.836    73.57
1780.50    0.838    73.87
1781.50    0.840    74.16
1782.50    0.842    74.45
1783.50    0.844    74.74
1784.50    0.846    75.03
1785.50    0.848    75.32
1786.50    0.850    75.61
1787.50    0.852    75.89
1788.50    0.854    76.17
1789.50    0.856    76.46
1790.50    0.858    76.74
1791.50    0.860    77.02
1792.50    0.861    77.30
1793.50    0.863    77.58
1794.50    0.865    77.85
1795.50    0.866    78.13
1796.50    0.868    78.40
1797.50    0.869    78.68
1798.50    0.871    78.95
1799.50    0.872    79.22
1800.50    0.874    79.49
1801.50    0.875    79.76
1802.50    0.876    80.03
1803.50    0.878    80.30
1804.50    0.879    80.57
1805.50    0.880    80.83
1806.50    0.881    81.10
1807.50    0.882    81.37
1808.50    0.883    81.63
1809.50    0.885    81.90
1810.50    0.886    82.16
1811.50    0.887    82.42
1812.50    0.888    82.68
1813.50    0.888    82.95
1814.50    0.889    83.21
1815.50    0.890    83.47
1816.50    0.891    83.73
1817.50    0.892    83.99
1818.50    0.893    84.25
1819.50    0.893    84.51
1820.50    0.894    84.77
1821.50    0.895    85.02
1822.50    0.895    85.28
1823.50    0.896    85.54
1824.50    0.897    85.80
1825.50    0.897    86.05
1826.50    0.898    86.31
1827.50    0.898    86.56
1828.50    0.899    86.82
1829.50    0.899    87.08
1830.50    0.899    87.33
1831.50    0.900    87.59
1832.50    0.900    87.84
1833.50    0.900    88.10
1834.50    0.901    88.35
1835.50    0.901    88.61
1836.50    0.901    88.86
1837.50    0.901    89.11
1838.50    0.901    89.37
1839.50    0.902    89.62
1840.50    0.902    89.88
1841.50    0.902    90.13
1842.50    0.902    90.38
1843.50    0.902    90.64
1844.50    0.902    90.89
1845.50    0.902    91.15
1846.50    0.902    91.40
1847.50    0.901    91.65
1848.50    0.901    91.91
1849.50    0.901    92.16
1850.50    0.901    92.42
1851.50    0.901    92.67
1852.50    0.901    92.93
1853.50    0.900    93.18
1854.50    0.900    93.43
1855.50    0.900    93.69
1856.50    0.899    93.94
1857.50    0.899    94.20
1858.50    0.899    94.46
1859.50    0.898    94.71
1860.50    0.898    94.97
1861.50    0.897    95.22
1862.50    0.897    95.48
1863.50    0.896    95.74
1864.50    0.896    95.99
1865.50    0.895    96.25
1866.50    0.895    96.51
1867.50    0.894    96.77
1868.50    0.893    97.03
1869.50    0.893    97.28
1870.50    0.892    97.54
1871.50    0.891    97.80
1872.50    0.891    98.06
1873.50    0.890    98.32
1874.50    0.889    98.59
1875.50    0.888    98.85
1876.50    0.888    99.11
1877.50    0.887    99.37
1878.50    0.886    99.63
1879.50    0.885    99.90
1880.50    0.884   100.16
1881.50    0.883   100.42
1882.50    0.882   100.69
1883.50    0.881   100.96
1884.50    0.880   101.22
1885.50    0.879   101.49
1886.50    0.878   101.76
1887.50    0.877   102.02
1888.50    0.876   102.29
1889.50    0.875   102.56
1890.50    0.874   102.83
1891.50    0.873   103.10
1892.50    0.872   103.37
1893.50    0.871   103.65
1894.50    0.869   103.92
1895.50    0.868   104.19
1896.50    0.867   104.47
1897.50    0.866   104.74
1898.50    0.865   105.02
1899.50    0.863   105.29
1900.50    0.862   105.57
1901.50    0.861   105.85
1902.50    0.859   106.13
1903.50    0.858   106.41
1904.50    0.857   106.69
1905.50    0.855   106.97
1906.50    0.854   107.25
1907.50    0.852   107.54
1908.50    0.851   107.82
1909.50    0.850   108.11
1910.50    0.848   108.39
1911.50    0.847   108.68
1912.50    0.845   108.97
1913.50    0.844   109.26
1914.50    0.842   109.55
1915.50    0.841   109.84
1916.50    0.839   110.13
1917.50    0.837   110.43
1918.50    0.836   110.72
1919.50    0.834   111.02
1920.50    0.833   111.32
1921.50    0.831   111.61
1922.50    0.829   111.91
1923.50    0.828   112.22
1924.50    0.826   112.52
1925.50    0.824   112.82
1926.50    0.823   113.12
1927.50    0.821   113.43
1928.50    0.819   113.74
1929.50    0.817   114.05
1930.50    0.816   114.36
1931.50    0.814   114.67
1932.50    0.812   114.98
1933.50    0.810   115.29
1934.50    0.808   115.61
1935.50    0.807   115.93
1936.50    0.805   116.24
1937.50    0.803   116.56
1938.50    0.801   116.88
1939.50    0.799   117.21
1940.50    0.797   117.53
1941.50    0.795   117.86
1942.50    0.793   118.18
1943.50    0.791   118.51
1944.50    0.789   118.84
1945.50    0.787   119.18
1946.50    0.786   119.51
1947.50    0.784   119.84
1948.50    0.782   120.18
1949.50    0.780   120.52
1950.50    0.778   120.86
1951.50    0.776   121.20
1952.50    0.774   121.55
1953.50    0.771   121.89
1954.50    0.769   122.24
1955.50    0.767   122.59
1956.50    0.765   122.94
1957.50    0.763   123.30
1958.50    0.761   123.65
1959.50    0.759   124.01
1960.50    0.757   124.37
1961.50    0.755   124.73
1962.50    0.753   125.09
1963.50    0.751   125.46
1964.50    0.748   125.83
1965.50    0.746   126.20
1966.50    0.744   126.57
1967.50    0.742   126.94
1968.50    0.740   127.32
1969.50    0.738   127.70
1970.50    0.736   128.08
1971.50    0.733   128.46
1972.50    0.731   128.84
1973.50    0.729   129.23
1974.50    0.727   129.62
1975.50    0.725   130.01
1976.50    0.722   130.41
1977.50    0.720   130.80
1978.50    0.718   131.20
1979.50    0.716   131.61
1980.50    0.713   132.01
1981.50    0.711   132.42
1982.50    0.709   132.83
1983.50    0.707   133.24
1984.50    0.705   133.65
1985.50    0.702   134.07
1986.50    0.700   134.49
1987.50    0.698   134.91
1988.50    0.695   135.34
1989.50    0.693   135.77
1990.50    0.691   136.20
1991.50    0.689   136.63
1992.50    0.686   137.07
1993.50    0.684   137.51
1994.50    0.682   137.95
1995.50    0.680   138.40
1996.50    0.677   138.85
1997.50    0.675   139.30
1998.50    0.673   139.75
1999.50    0.671   140.21
2000.50    0.668   140.67
2001.50    0.666   141.13
2002.50    0.664   141.60
2003.50    0.662   142.07
2004.50    0.659   142.54
2005.50    0.657   143.02
2006.50    0.655   143.50
2007.50    0.652   143.98
2008.50    0.650   144.47
2009.50    0.648   144.96
2010.50    0.646   145.45
2011.50    0.643   145.95
2012.50    0.641   146.45
2013.50    0.639   146.96
2014.50    0.637   147.46
2015.50    0.634   147.97
2016.50    0.632   148.49
2017.50    0.630   149.01
2018.50    0.628   149.53
2019.50    0.626   150.06
2020.50    0.623   150.58
2021.50    0.621   151.12
2022.50    0.619   151.66
2023.50    0.617   152.20
2024.50    0.615   152.74
2025.50    0.612   153.29
2026.50    0.610   153.84
2027.50    0.608   154.40
2028.50    0.606   154.96
2029.50    0.604   155.52
2030.50    0.602   156.09
2031.50    0.599   156.67
2032.50    0.597   157.24
2033.50    0.595   157.82
2034.50    0.593   158.41
2035.50    0.591   159.00
2036.50    0.589   159.59
2037.50    0.587   160.19
2038.50    0.585   160.79
2039.50    0.582   161.40
2040.50    0.580   162.01
2041.50    0.578   162.62
2042.50    0.576   163.24
2043.50    0.574   163.87
2044.50    0.572   164.49
2045.50    0.570   165.13
2046.50    0.568   165.76
2047.50    0.566   166.41
2048.50    0.564   167.05
2049.50    0.562   167.70
2050.50    0.560   168.36
2051.50    0.558   169.02
2052.50    0.556   169.68
2053.50    0.554   170.35
2054.50    0.552   171.03
2055.50    0.551   171.71
2056.50    0.549   172.39
2057.50    0.547   173.08
2058.50    0.545   173.77
2059.50    0.543   174.47
2060.50    0.541   175.17
2061.50    0.539   175.88
2062.50    0.537   176.59
2063.50    0.536   177.31
2064.50    0.534   178.03
2065.50    0.532   178.76
2066.50    0.530   179.49
2067.50    0.528   180.23
2068.50    0.526   180.97
2069.50    0.525   181.72
2070.50    0.523   182.47
2071.50    0.521   183.23
2072.50    0.519   183.99
2073.50    0.518   184.76
2074.50    0.516   185.53
2075.50    0.514   186.31
2076.50    0.512   187.10
2077.50    0.510   187.89
2078.50    0.509   188.68
2079.50    0.507   189.48
2080.50    0.505   190.29
2081.50    0.503   191.10
2082.50    0.502   191.92
2083.50    0.500   192.74
2084.50    0.498   193.57
2085.50    0.496   194.41
2086.50    0.495   195.25
2087.50    0.493   196.09
2088.50    0.491   196.95
2089.50    0.489   197.81
2090.50    0.487   198.67
2091.50    0.486   199.54
2092.50    0.484   200.42
2093.50    0.482   201.31
2094.50    0.480   202.20
2095.50    0.478   203.10
2096.50    0.476   204.00
2097.50    0.474   204.92
2098.50    0.473   205.84
2099.50    0.471   206.77
2100.50    0.469   207.70
2101.50    0.467   208.65
2102.50    0.464   209.60
2103.50    0.462   210.56
2104.50    0.460   211.53
2105.50    0.458   212.51
2106.50    0.456   213.50
2107.50    0.454   214.50
2108.50    0.451   215.51
2109.50    0.449   216.53
2110.50    0.446   217.56
2111.50    0.444   218.60
2112.50    0.441   219.65
2113.50    0.439   220.72
2114.50    0.436   221.80
2115.50    0.433   222.89
2116.50    0.431   224.00
2117.50    0.428   225.12
2118.50    0.425   226.25
2119.50    0.422   227.41
2120.50    0.419   228.57
2121.50    0.415   229.76
2122.50    0.412   230.97
2123.50    0.409   232.19
2124.50    0.405   233.44
2125.50    0.402   234.71
2126.50    0.398   236.00
2127.50    0.394   237.32
2128.50    0.390   238.66
2129.50    0.386   240.03
2130.50    0.382   241.43
2131.50    0.378   242.86
2132.50    0.373   244.33
2133.50    0.369   245.83
2134.50    0.364   247.36
2135.50    0.360   248.94
2136.50    0.355   250.55
2137.50    0.350   252.21
2138.50    0.345   253.92
2139.50    0.340   255.68
2140.50    0.335   257.49
2141.50    0.330   259.36
2142.50    0.325   261.28
2143.50    0.320   263.27
2144.50    0.314   265.33
2145.50    0.309   267.45
2146.50    0.304   269.64
2147.50    0.299   271.91
2148.50    0.294   274.26
2149.50    0.289   276.69
2150.50    0.284   279.20
2151.50    0.280   281.80
2152.50    0.275   284.48
2153.50    0.271   287.24
2154.50    0.267   290.09
2155.50    0.264   293.02
2156.50    0.261   296.02
2157.50    0.258   299.10
2158.50    0.255   302.23
2159.50    0.253   305.43
2160.50    0.252   308.67
2161.50    0.251   311.94
2162.50    0.250   315.23
2163.50    0.250   318.54
2164.50    0.251   321.83
2165.50    0.252   325.11
2166.50    0.253   328.36
2167.50    0.255   331.56
2168.50    0.258   334.70
2169.50    0.261   337.78
2170.50    0.264   340.78
2171.50    0.268   343.70
2172.50    0.272   346.54
2173.50    0.277   349.28
2174.50    0.282   351.93
2175.50    0.287   354.48
2176.50    0.293   356.94
2177.50    0.299   359.30
2178.50    0.305     1.57
2179.50    0.311     3.75
2180.50    0.318     5.84
2181.50    0.324     7.85
2182.50    0.331     9.77
2183.50    0.338    11.62
2184.50    0.345    13.39
2185.50    0.352    15.09
2186.50    0.359    16.72
2187.50    0.367    18.28
2188.50    0.374    19.79
2189.50    0.381    21.24
2190.50    0.389    22.63
2191.50    0.396    23.97
2192.50    0.404    25.26
2193.50    0.411    26.50
2194.50    0.418    27.71
2195.50    0.426    28.86
2196.50    0.433    29.98
2197.50    0.440    31.07
2198.50    0.448    32.11
2199.50    0.455    33.13
2200.50    0.462    34.11
2201.50    0.469    35.06
2202.50    0.476    35.99
2203.50    0.483    36.88
2204.50    0.490    37.75
2205.50    0.497    38.60
2206.50    0.504    39.43
2207.50    0.511    40.23
2208.50    0.518    41.01
2209.50    0.524    41.77
2210.50    0.531    42.51
2211.50    0.537    43.23
2212.50    0.544    43.94
2213.50    0.550    44.63
2214.50    0.557    45.30
2215.50    0.563    45.96
2216.50    0.569    46.61
2217.50    0.575    47.24
2218.50    0.581    47.86
2219.50    0.587    48.46
2220.50    0.593    49.05
2221.50    0.599    49.64
2222.50    0.605    50.21
2223.50    0.610    50.76
2224.50    0.616    51.31
2225.50    0.622    51.85
2226.50    0.627    52.38
2227.50    0.632    52.90
2228.50    0.638    53.42
2229.50    0.643    53.92
2230.50    0.648    54.41
2231.50    0.653    54.90
2232.50    0.658    55.38
2233.50    0.663    55.85
2234.50    0.668    56.32
2235.50    0.673    56.78
2236.50    0.678    57.23
2237.50    0.683    57.68
2238.50    0.687    58.12
2239.50    0.692    58.55
2240.50    0.697    58.98
2241.50    0.701    59.40
2242.50    0.705    59.82
2243.50    0.710    60.23
2244.50    0.714    60.64
2245.50    0.718    61.04
2246.50    0.723    61.44
2247.50    0.727    61.83
2248.50    0.731    62.22
2249.50    0.735    62.61
2250.50    0.739    62.99
2251.50    0.742    63.36
2252.50    0.746    63.74
2253.50    0.750    64.10
2254.50    0.754    64.47
2255.50    0.757    64.83
2256.50    0.761    65.19
2257.50    0.764    65.54
2258.50    0.768    65.90
2259.50    0.771    66.24
2260.50    0.775    66.59
2261.50    0.778    66.93
2262.50    0.781    67.27
2263.50    0.784    67.61
2264.50    0.788    67.94
2265.50    0.791    68.28
2266.50    0.794    68.60
2267.50    0.797    68.93
2268.50    0.800    69.26
2269.50    0.802    69.58
2270.50    0.805    69.90
2271.50    0.808    70.21
2272.50    0.811    70.53
2273.50    0.814    70.84
2274.50    0.816    71.15
2275.50    0.819    71.46






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 15:46:02



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