Double Star Calculator - Orbit

Orbital Elements for STT18AB
WDS: STT18AB WDS ID/Discoverer
P: 386.510 Orbital period (years)
a: 3.296 Semi-major axis (arcseconds)
i: 75.3 Inclination (degrees)
Ω: 76.5 Longitude of ascending node (degrees)
T: 1828.130 Epoch of periastron passage (year)
e: 0.834 Eccentricity
ω: 284.3 Longitude of periastron (degrees)
Start-Year: 1831.745 Year
End-Year: 2218.255 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STT18AB
Position: 004223.21+041000.0 Epoch-2000 right ascension and declination
WDS-ID: 00424+0410 WDS designation
Discoverer Code: STT18AB Discover designation and components
ADS number: 588 Aitken Double Star catalog
HD number: 3972 HD catalog number
Hipparcos number: 3326 Hipparcos catalog number
V1: 7.86 Magnitude of the primary
V2: 9.71 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1999 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: Hrt2001b Reference

Double Star Orbit for STT18AB



WDS 6th Orbit including measures of STT18AB

-- 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 STT18AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.159   213.22
--------------------------
1831.74    0.658    71.65
1832.74    0.756    74.49
1833.74    0.840    76.71
1834.74    0.912    78.56
1835.74    0.973    80.15
1836.74    1.025    81.57
1837.74    1.071    82.86
1838.74    1.110    84.05
1839.74    1.144    85.17
1840.74    1.174    86.22
1841.74    1.201    87.23
1842.74    1.224    88.19
1843.74    1.244    89.12
1844.74    1.262    90.02
1845.74    1.278    90.90
1846.74    1.291    91.76
1847.74    1.303    92.60
1848.74    1.314    93.43
1849.74    1.323    94.24
1850.74    1.331    95.05
1851.74    1.338    95.84
1852.74    1.344    96.63
1853.74    1.348    97.41
1854.74    1.352    98.19
1855.74    1.356    98.96
1856.74    1.358    99.73
1857.74    1.360   100.50
1858.74    1.362   101.26
1859.74    1.362   102.03
1860.74    1.363   102.79
1861.74    1.363   103.55
1862.74    1.362   104.32
1863.74    1.361   105.08
1864.74    1.360   105.85
1865.74    1.359   106.61
1866.74    1.357   107.38
1867.74    1.355   108.15
1868.74    1.353   108.92
1869.74    1.351   109.70
1870.74    1.348   110.48
1871.74    1.346   111.26
1872.74    1.343   112.04
1873.74    1.340   112.83
1874.74    1.337   113.62
1875.74    1.334   114.41
1876.74    1.331   115.21
1877.74    1.327   116.01
1878.74    1.324   116.82
1879.74    1.321   117.63
1880.74    1.318   118.44
1881.74    1.314   119.26
1882.74    1.311   120.08
1883.74    1.308   120.91
1884.74    1.305   121.74
1885.74    1.302   122.57
1886.74    1.298   123.41
1887.74    1.295   124.26
1888.74    1.292   125.10
1889.74    1.290   125.95
1890.74    1.287   126.81
1891.74    1.284   127.66
1892.74    1.281   128.52
1893.74    1.279   129.39
1894.74    1.277   130.26
1895.74    1.274   131.13
1896.74    1.272   132.00
1897.74    1.270   132.88
1898.74    1.268   133.76
1899.74    1.267   134.64
1900.74    1.265   135.52
1901.74    1.264   136.41
1902.74    1.262   137.30
1903.74    1.261   138.19
1904.74    1.260   139.08
1905.74    1.260   139.97
1906.74    1.259   140.86
1907.74    1.259   141.76
1908.74    1.258   142.65
1909.74    1.258   143.55
1910.74    1.259   144.44
1911.74    1.259   145.33
1912.74    1.259   146.23
1913.74    1.260   147.12
1914.74    1.261   148.01
1915.74    1.262   148.90
1916.74    1.263   149.79
1917.74    1.265   150.68
1918.74    1.267   151.56
1919.74    1.268   152.44
1920.74    1.270   153.32
1921.74    1.273   154.20
1922.74    1.275   155.07
1923.74    1.278   155.94
1924.74    1.281   156.81
1925.74    1.284   157.67
1926.74    1.287   158.53
1927.74    1.290   159.38
1928.74    1.294   160.23
1929.74    1.298   161.07
1930.74    1.302   161.91
1931.74    1.306   162.74
1932.74    1.310   163.57
1933.74    1.315   164.40
1934.74    1.319   165.21
1935.74    1.324   166.02
1936.74    1.329   166.83
1937.74    1.335   167.63
1938.74    1.340   168.42
1939.74    1.346   169.20
1940.74    1.351   169.98
1941.74    1.357   170.76
1942.74    1.363   171.52
1943.74    1.370   172.28
1944.74    1.376   173.03
1945.74    1.382   173.78
1946.74    1.389   174.51
1947.74    1.396   175.25
1948.74    1.403   175.97
1949.74    1.410   176.69
1950.74    1.417   177.39
1951.74    1.425   178.10
1952.74    1.432   178.79
1953.74    1.440   179.48
1954.74    1.447   180.16
1955.74    1.455   180.83
1956.74    1.463   181.50
1957.74    1.471   182.15
1958.74    1.480   182.80
1959.74    1.488   183.45
1960.74    1.496   184.08
1961.74    1.505   184.71
1962.74    1.514   185.33
1963.74    1.522   185.95
1964.74    1.531   186.56
1965.74    1.540   187.16
1966.74    1.549   187.75
1967.74    1.558   188.34
1968.74    1.567   188.92
1969.74    1.577   189.49
1970.74    1.586   190.06
1971.74    1.595   190.62
1972.74    1.605   191.17
1973.74    1.614   191.72
1974.74    1.624   192.26
1975.74    1.634   192.79
1976.74    1.644   193.32
1977.74    1.653   193.84
1978.74    1.663   194.36
1979.74    1.673   194.87
1980.74    1.683   195.37
1981.74    1.693   195.87
1982.74    1.703   196.36
1983.74    1.713   196.84
1984.74    1.723   197.32
1985.74    1.734   197.80
1986.74    1.744   198.27
1987.74    1.754   198.73
1988.74    1.764   199.19
1989.74    1.775   199.64
1990.74    1.785   200.09
1991.74    1.796   200.53
1992.74    1.806   200.97
1993.74    1.816   201.40
1994.74    1.827   201.82
1995.74    1.837   202.25
1996.74    1.848   202.66
1997.74    1.858   203.08
1998.74    1.869   203.48
1999.74    1.879   203.89
2000.74    1.890   204.29
2001.74    1.900   204.68
2002.74    1.911   205.07
2003.74    1.922   205.46
2004.74    1.932   205.84
2005.74    1.943   206.22
2006.74    1.953   206.59
2007.74    1.964   206.96
2008.74    1.974   207.32
2009.74    1.985   207.69
2010.74    1.995   208.04
2011.74    2.006   208.40
2012.74    2.017   208.75
2013.74    2.027   209.09
2014.74    2.038   209.44
2015.74    2.048   209.78
2016.74    2.059   210.11
2017.74    2.069   210.45
2018.74    2.079   210.77
2019.74    2.090   211.10
2020.74    2.100   211.42
2021.74    2.111   211.74
2022.74    2.121   212.06
2023.74    2.131   212.37
2024.74    2.141   212.68
2025.74    2.152   212.99
2026.74    2.162   213.30
2027.74    2.172   213.60
2028.74    2.182   213.90
2029.74    2.192   214.19
2030.74    2.202   214.49
2031.74    2.213   214.78
2032.74    2.223   215.06
2033.74    2.232   215.35
2034.74    2.242   215.63
2035.74    2.252   215.91
2036.74    2.262   216.19
2037.74    2.272   216.47
2038.74    2.282   216.74
2039.74    2.291   217.01
2040.74    2.301   217.28
2041.74    2.311   217.55
2042.74    2.320   217.81
2043.74    2.330   218.07
2044.74    2.339   218.33
2045.74    2.348   218.59
2046.74    2.358   218.85
2047.74    2.367   219.10
2048.74    2.376   219.35
2049.74    2.385   219.60
2050.74    2.395   219.85
2051.74    2.404   220.10
2052.74    2.413   220.34
2053.74    2.421   220.58
2054.74    2.430   220.82
2055.74    2.439   221.06
2056.74    2.448   221.30
2057.74    2.456   221.54
2058.74    2.465   221.77
2059.74    2.473   222.00
2060.74    2.482   222.23
2061.74    2.490   222.46
2062.74    2.498   222.69
2063.74    2.506   222.92
2064.74    2.515   223.14
2065.74    2.523   223.36
2066.74    2.531   223.59
2067.74    2.538   223.81
2068.74    2.546   224.03
2069.74    2.554   224.24
2070.74    2.561   224.46
2071.74    2.569   224.68
2072.74    2.576   224.89
2073.74    2.584   225.10
2074.74    2.591   225.31
2075.74    2.598   225.53
2076.74    2.605   225.73
2077.74    2.612   225.94
2078.74    2.619   226.15
2079.74    2.625   226.36
2080.74    2.632   226.56
2081.74    2.639   226.76
2082.74    2.645   226.97
2083.74    2.651   227.17
2084.74    2.658   227.37
2085.74    2.664   227.57
2086.74    2.670   227.77
2087.74    2.675   227.97
2088.74    2.681   228.17
2089.74    2.687   228.36
2090.74    2.692   228.56
2091.74    2.698   228.75
2092.74    2.703   228.95
2093.74    2.708   229.14
2094.74    2.713   229.33
2095.74    2.718   229.53
2096.74    2.723   229.72
2097.74    2.727   229.91
2098.74    2.732   230.10
2099.74    2.736   230.29
2100.74    2.741   230.48
2101.74    2.745   230.67
2102.74    2.749   230.85
2103.74    2.752   231.04
2104.74    2.756   231.23
2105.74    2.759   231.41
2106.74    2.763   231.60
2107.74    2.766   231.78
2108.74    2.769   231.97
2109.74    2.772   232.15
2110.74    2.775   232.34
2111.74    2.777   232.52
2112.74    2.780   232.71
2113.74    2.782   232.89
2114.74    2.784   233.07
2115.74    2.786   233.25
2116.74    2.787   233.44
2117.74    2.789   233.62
2118.74    2.790   233.80
2119.74    2.791   233.98
2120.74    2.792   234.17
2121.74    2.793   234.35
2122.74    2.793   234.53
2123.74    2.794   234.71
2124.74    2.794   234.89
2125.74    2.794   235.07
2126.74    2.794   235.25
2127.74    2.793   235.44
2128.74    2.792   235.62
2129.74    2.791   235.80
2130.74    2.790   235.98
2131.74    2.789   236.16
2132.74    2.787   236.35
2133.74    2.785   236.53
2134.74    2.783   236.71
2135.74    2.781   236.89
2136.74    2.778   237.08
2137.74    2.775   237.26
2138.74    2.772   237.45
2139.74    2.769   237.63
2140.74    2.765   237.82
2141.74    2.761   238.00
2142.74    2.756   238.19
2143.74    2.752   238.37
2144.74    2.747   238.56
2145.74    2.742   238.75
2146.74    2.736   238.94
2147.74    2.730   239.13
2148.74    2.724   239.32
2149.74    2.718   239.51
2150.74    2.711   239.70
2151.74    2.703   239.90
2152.74    2.696   240.09
2153.74    2.688   240.29
2154.74    2.679   240.48
2155.74    2.671   240.68
2156.74    2.661   240.88
2157.74    2.652   241.08
2158.74    2.642   241.28
2159.74    2.631   241.49
2160.74    2.620   241.69
2161.74    2.609   241.90
2162.74    2.597   242.11
2163.74    2.584   242.32
2164.74    2.571   242.53
2165.74    2.558   242.75
2166.74    2.544   242.97
2167.74    2.529   243.19
2168.74    2.514   243.41
2169.74    2.498   243.63
2170.74    2.482   243.86
2171.74    2.465   244.09
2172.74    2.447   244.33
2173.74    2.428   244.57
2174.74    2.409   244.81
2175.74    2.389   245.06
2176.74    2.368   245.31
2177.74    2.347   245.56
2178.74    2.324   245.82
2179.74    2.301   246.09
2180.74    2.277   246.36
2181.74    2.251   246.63
2182.74    2.225   246.92
2183.74    2.197   247.20
2184.74    2.169   247.50
2185.74    2.139   247.81
2186.74    2.108   248.12
2187.74    2.075   248.45
2188.74    2.042   248.78
2189.74    2.006   249.13
2190.74    1.969   249.48
2191.74    1.930   249.86
2192.74    1.890   250.25
2193.74    1.847   250.65
2194.74    1.802   251.08
2195.74    1.755   251.52
2196.74    1.705   252.00
2197.74    1.653   252.50
2198.74    1.597   253.04
2199.74    1.539   253.61
2200.74    1.476   254.24
2201.74    1.410   254.92
2202.74    1.339   255.67
2203.74    1.263   256.50
2204.74    1.182   257.45
2205.74    1.094   258.55
2206.74    0.999   259.84
2207.74    0.896   261.42
2208.74    0.783   263.43
2209.74    0.661   266.16
2210.74    0.527   270.22
2211.74    0.384   277.19
2212.74    0.241   292.57
2213.74    0.143   337.96
2214.74    0.203    35.47
2215.74    0.340    56.25
2216.74    0.478    64.93
2217.74    0.602    69.83






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 14:41:57



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