Double Star Calculator - Orbit

Orbital Elements for STT20AB
WDS: STT20AB WDS ID/Discoverer
P: 343.000 Orbital period (years)
a: 0.704 Semi-major axis (arcseconds)
i: 129.9 Inclination (degrees)
Ω: 120.9 Longitude of ascending node (degrees)
T: 1904.000 Epoch of periastron passage (year)
e: 0.292 Eccentricity
ω: 151.2 Longitude of periastron (degrees)
Start-Year: 1853.5 Year
End-Year: 2196.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT20AB
Position: 005435.22+191118.4 Epoch-2000 right ascension and declination
WDS-ID: 00546+1911 WDS designation
Discoverer Code: STT20AB Discover designation and components
ADS number: 746 Aitken Double Star catalog
HD number: 5267 HD catalog number
Hipparcos number: 4267 Hipparcos catalog number
V1: 6.12 Magnitude of the primary
V2: 7.19 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2010 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: Doc2014a Reference

Double Star Orbit for STT20AB



WDS 6th Orbit including measures of STT20AB

-- 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 STT20AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.646   168.21
--------------------------
1853.50    0.449    65.79
1854.50    0.442    64.18
1855.50    0.435    62.52
1856.50    0.428    60.81
1857.50    0.422    59.04
1858.50    0.416    57.22
1859.50    0.410    55.35
1860.50    0.404    53.42
1861.50    0.398    51.43
1862.50    0.393    49.39
1863.50    0.388    47.30
1864.50    0.383    45.15
1865.50    0.379    42.96
1866.50    0.375    40.71
1867.50    0.371    38.41
1868.50    0.368    36.08
1869.50    0.365    33.70
1870.50    0.362    31.29
1871.50    0.360    28.84
1872.50    0.359    26.37
1873.50    0.358    23.89
1874.50    0.357    21.38
1875.50    0.356    18.87
1876.50    0.357    16.36
1877.50    0.357    13.85
1878.50    0.358    11.36
1879.50    0.359     8.87
1880.50    0.361     6.41
1881.50    0.363     3.98
1882.50    0.366     1.58
1883.50    0.368   359.21
1884.50    0.372   356.88
1885.50    0.375   354.59
1886.50    0.379   352.34
1887.50    0.383   350.14
1888.50    0.387   347.98
1889.50    0.391   345.88
1890.50    0.396   343.82
1891.50    0.401   341.80
1892.50    0.406   339.84
1893.50    0.411   337.92
1894.50    0.416   336.05
1895.50    0.421   334.23
1896.50    0.426   332.45
1897.50    0.431   330.71
1898.50    0.436   329.01
1899.50    0.441   327.35
1900.50    0.446   325.73
1901.50    0.451   324.14
1902.50    0.456   322.59
1903.50    0.461   321.07
1904.50    0.465   319.58
1905.50    0.470   318.13
1906.50    0.474   316.69
1907.50    0.479   315.29
1908.50    0.483   313.91
1909.50    0.487   312.55
1910.50    0.490   311.21
1911.50    0.494   309.89
1912.50    0.497   308.59
1913.50    0.500   307.31
1914.50    0.503   306.04
1915.50    0.506   304.78
1916.50    0.508   303.54
1917.50    0.510   302.31
1918.50    0.512   301.09
1919.50    0.514   299.88
1920.50    0.516   298.68
1921.50    0.517   297.48
1922.50    0.518   296.29
1923.50    0.519   295.11
1924.50    0.520   293.93
1925.50    0.521   292.75
1926.50    0.521   291.57
1927.50    0.521   290.40
1928.50    0.521   289.23
1929.50    0.521   288.05
1930.50    0.521   286.88
1931.50    0.520   285.70
1932.50    0.520   284.52
1933.50    0.519   283.34
1934.50    0.518   282.15
1935.50    0.517   280.96
1936.50    0.516   279.76
1937.50    0.514   278.56
1938.50    0.513   277.35
1939.50    0.512   276.13
1940.50    0.510   274.91
1941.50    0.508   273.68
1942.50    0.506   272.44
1943.50    0.505   271.19
1944.50    0.503   269.93
1945.50    0.501   268.67
1946.50    0.499   267.39
1947.50    0.497   266.10
1948.50    0.495   264.81
1949.50    0.493   263.50
1950.50    0.491   262.18
1951.50    0.489   260.85
1952.50    0.487   259.51
1953.50    0.485   258.16
1954.50    0.483   256.80
1955.50    0.482   255.43
1956.50    0.480   254.05
1957.50    0.478   252.66
1958.50    0.476   251.26
1959.50    0.475   249.85
1960.50    0.473   248.43
1961.50    0.472   247.00
1962.50    0.471   245.56
1963.50    0.470   244.12
1964.50    0.469   242.67
1965.50    0.468   241.21
1966.50    0.467   239.75
1967.50    0.466   238.28
1968.50    0.466   236.81
1969.50    0.465   235.34
1970.50    0.465   233.86
1971.50    0.465   232.39
1972.50    0.465   230.91
1973.50    0.465   229.43
1974.50    0.465   227.95
1975.50    0.466   226.48
1976.50    0.466   225.01
1977.50    0.467   223.54
1978.50    0.468   222.08
1979.50    0.469   220.63
1980.50    0.470   219.18
1981.50    0.472   217.75
1982.50    0.473   216.32
1983.50    0.475   214.90
1984.50    0.477   213.49
1985.50    0.479   212.09
1986.50    0.481   210.70
1987.50    0.483   209.33
1988.50    0.486   207.97
1989.50    0.488   206.63
1990.50    0.491   205.30
1991.50    0.494   203.98
1992.50    0.497   202.68
1993.50    0.500   201.40
1994.50    0.503   200.13
1995.50    0.507   198.88
1996.50    0.510   197.64
1997.50    0.514   196.42
1998.50    0.517   195.22
1999.50    0.521   194.04
2000.50    0.525   192.87
2001.50    0.529   191.72
2002.50    0.533   190.59
2003.50    0.537   189.47
2004.50    0.541   188.38
2005.50    0.546   187.30
2006.50    0.550   186.23
2007.50    0.554   185.19
2008.50    0.559   184.16
2009.50    0.563   183.14
2010.50    0.568   182.15
2011.50    0.573   181.17
2012.50    0.577   180.20
2013.50    0.582   179.25
2014.50    0.587   178.32
2015.50    0.592   177.40
2016.50    0.597   176.50
2017.50    0.601   175.61
2018.50    0.606   174.73
2019.50    0.611   173.87
2020.50    0.616   173.02
2021.50    0.621   172.19
2022.50    0.626   171.37
2023.50    0.631   170.56
2024.50    0.636   169.77
2025.50    0.641   168.98
2026.50    0.646   168.21
2027.50    0.651   167.45
2028.50    0.656   166.71
2029.50    0.661   165.97
2030.50    0.666   165.25
2031.50    0.671   164.53
2032.50    0.676   163.83
2033.50    0.681   163.13
2034.50    0.685   162.45
2035.50    0.690   161.78
2036.50    0.695   161.11
2037.50    0.700   160.45
2038.50    0.705   159.81
2039.50    0.709   159.17
2040.50    0.714   158.54
2041.50    0.719   157.92
2042.50    0.723   157.30
2043.50    0.728   156.70
2044.50    0.733   156.10
2045.50    0.737   155.51
2046.50    0.741   154.92
2047.50    0.746   154.35
2048.50    0.750   153.78
2049.50    0.755   153.21
2050.50    0.759   152.66
2051.50    0.763   152.10
2052.50    0.767   151.56
2053.50    0.771   151.02
2054.50    0.775   150.49
2055.50    0.779   149.96
2056.50    0.783   149.44
2057.50    0.787   148.92
2058.50    0.791   148.41
2059.50    0.795   147.90
2060.50    0.798   147.40
2061.50    0.802   146.90
2062.50    0.806   146.40
2063.50    0.809   145.91
2064.50    0.812   145.43
2065.50    0.816   144.95
2066.50    0.819   144.47
2067.50    0.822   143.99
2068.50    0.825   143.52
2069.50    0.828   143.06
2070.50    0.831   142.59
2071.50    0.834   142.13
2072.50    0.837   141.68
2073.50    0.840   141.22
2074.50    0.843   140.77
2075.50    0.845   140.32
2076.50    0.848   139.88
2077.50    0.850   139.44
2078.50    0.852   139.00
2079.50    0.855   138.56
2080.50    0.857   138.12
2081.50    0.859   137.69
2082.50    0.861   137.26
2083.50    0.863   136.83
2084.50    0.865   136.40
2085.50    0.867   135.97
2086.50    0.868   135.55
2087.50    0.870   135.13
2088.50    0.871   134.71
2089.50    0.873   134.29
2090.50    0.874   133.87
2091.50    0.875   133.45
2092.50    0.876   133.04
2093.50    0.877   132.62
2094.50    0.878   132.21
2095.50    0.879   131.79
2096.50    0.880   131.38
2097.50    0.881   130.97
2098.50    0.881   130.56
2099.50    0.882   130.15
2100.50    0.882   129.74
2101.50    0.882   129.33
2102.50    0.882   128.92
2103.50    0.882   128.51
2104.50    0.882   128.10
2105.50    0.882   127.69
2106.50    0.882   127.28
2107.50    0.882   126.87
2108.50    0.881   126.45
2109.50    0.881   126.04
2110.50    0.880   125.63
2111.50    0.879   125.22
2112.50    0.878   124.81
2113.50    0.877   124.39
2114.50    0.876   123.98
2115.50    0.875   123.56
2116.50    0.874   123.14
2117.50    0.873   122.73
2118.50    0.871   122.31
2119.50    0.870   121.88
2120.50    0.868   121.46
2121.50    0.866   121.04
2122.50    0.864   120.61
2123.50    0.862   120.18
2124.50    0.860   119.75
2125.50    0.858   119.32
2126.50    0.855   118.88
2127.50    0.853   118.45
2128.50    0.850   118.01
2129.50    0.848   117.56
2130.50    0.845   117.12
2131.50    0.842   116.67
2132.50    0.839   116.22
2133.50    0.836   115.76
2134.50    0.833   115.30
2135.50    0.829   114.84
2136.50    0.826   114.38
2137.50    0.822   113.91
2138.50    0.818   113.43
2139.50    0.815   112.95
2140.50    0.811   112.47
2141.50    0.807   111.98
2142.50    0.803   111.49
2143.50    0.798   110.99
2144.50    0.794   110.49
2145.50    0.790   109.98
2146.50    0.785   109.46
2147.50    0.780   108.94
2148.50    0.775   108.41
2149.50    0.771   107.88
2150.50    0.765   107.34
2151.50    0.760   106.79
2152.50    0.755   106.24
2153.50    0.750   105.67
2154.50    0.744   105.10
2155.50    0.739   104.52
2156.50    0.733   103.93
2157.50    0.727   103.33
2158.50    0.721   102.72
2159.50    0.715   102.11
2160.50    0.709   101.48
2161.50    0.703   100.84
2162.50    0.697   100.19
2163.50    0.691    99.52
2164.50    0.684    98.85
2165.50    0.678    98.16
2166.50    0.671    97.46
2167.50    0.664    96.74
2168.50    0.657    96.01
2169.50    0.650    95.26
2170.50    0.643    94.50
2171.50    0.636    93.72
2172.50    0.629    92.92
2173.50    0.622    92.11
2174.50    0.615    91.27
2175.50    0.607    90.42
2176.50    0.600    89.54
2177.50    0.592    88.64
2178.50    0.585    87.72
2179.50    0.577    86.78
2180.50    0.570    85.81
2181.50    0.562    84.81
2182.50    0.554    83.79
2183.50    0.547    82.74
2184.50    0.539    81.65
2185.50    0.531    80.54
2186.50    0.524    79.39
2187.50    0.516    78.21
2188.50    0.508    76.99
2189.50    0.501    75.74
2190.50    0.493    74.45
2191.50    0.486    73.11
2192.50    0.478    71.74
2193.50    0.471    70.32
2194.50    0.463    68.86
2195.50    0.456    67.35






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 14:44:58



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