Double Star Calculator - Orbit

Orbital Elements for COU321
WDS: COU321 WDS ID/Discoverer
P: 354.120 Orbital period (years)
a: 0.484 Semi-major axis (arcseconds)
i: 101.0 Inclination (degrees)
Ω: 142.2 Longitude of ascending node (degrees)
T: 2349.400 Epoch of periastron passage (year)
e: 0.776 Eccentricity
ω: 188.4 Longitude of periastron (degrees)
Start-Year: 1847.94 Year
End-Year: 2202.06 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU321
Position: 191757.89+201133.7 Epoch-2000 right ascension and declination
WDS-ID: 19180+2012 WDS designation
Discoverer Code: COU321 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 181025 HD catalog number
Hipparcos number: 94847 Hipparcos catalog number
V1: 8.92 Magnitude of the primary
V2: 8.92 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 1998 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: Doc2003e Reference

Double Star Orbit for COU321



WDS 6th Orbit including measures of COU321

-- 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 COU321
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.292   151.81
--------------------------
1847.94    0.817   139.37
1848.94    0.815   139.33
1849.94    0.813   139.28
1850.94    0.811   139.24
1851.94    0.809   139.20
1852.94    0.807   139.15
1853.94    0.805   139.11
1854.94    0.803   139.07
1855.94    0.801   139.02
1856.94    0.798   138.98
1857.94    0.796   138.93
1858.94    0.794   138.89
1859.94    0.791   138.84
1860.94    0.789   138.79
1861.94    0.786   138.75
1862.94    0.784   138.70
1863.94    0.781   138.65
1864.94    0.779   138.61
1865.94    0.776   138.56
1866.94    0.773   138.51
1867.94    0.770   138.46
1868.94    0.768   138.42
1869.94    0.765   138.37
1870.94    0.762   138.32
1871.94    0.759   138.27
1872.94    0.756   138.22
1873.94    0.752   138.17
1874.94    0.749   138.12
1875.94    0.746   138.07
1876.94    0.743   138.01
1877.94    0.740   137.96
1878.94    0.736   137.91
1879.94    0.733   137.86
1880.94    0.729   137.80
1881.94    0.726   137.75
1882.94    0.722   137.69
1883.94    0.718   137.64
1884.94    0.715   137.58
1885.94    0.711   137.53
1886.94    0.707   137.47
1887.94    0.703   137.41
1888.94    0.699   137.35
1889.94    0.696   137.29
1890.94    0.691   137.23
1891.94    0.687   137.17
1892.94    0.683   137.11
1893.94    0.679   137.05
1894.94    0.675   136.99
1895.94    0.671   136.93
1896.94    0.666   136.86
1897.94    0.662   136.80
1898.94    0.657   136.73
1899.94    0.653   136.66
1900.94    0.648   136.60
1901.94    0.643   136.53
1902.94    0.639   136.46
1903.94    0.634   136.39
1904.94    0.629   136.31
1905.94    0.624   136.24
1906.94    0.619   136.17
1907.94    0.614   136.09
1908.94    0.609   136.02
1909.94    0.604   135.94
1910.94    0.599   135.86
1911.94    0.593   135.78
1912.94    0.588   135.70
1913.94    0.583   135.61
1914.94    0.577   135.53
1915.94    0.572   135.44
1916.94    0.566   135.35
1917.94    0.560   135.26
1918.94    0.555   135.17
1919.94    0.549   135.07
1920.94    0.543   134.98
1921.94    0.537   134.88
1922.94    0.531   134.78
1923.94    0.525   134.68
1924.94    0.519   134.57
1925.94    0.512   134.46
1926.94    0.506   134.35
1927.94    0.500   134.24
1928.94    0.493   134.12
1929.94    0.487   134.00
1930.94    0.480   133.88
1931.94    0.473   133.76
1932.94    0.467   133.63
1933.94    0.460   133.49
1934.94    0.453   133.35
1935.94    0.446   133.21
1936.94    0.439   133.07
1937.94    0.432   132.91
1938.94    0.424   132.76
1939.94    0.417   132.60
1940.94    0.410   132.43
1941.94    0.402   132.25
1942.94    0.394   132.07
1943.94    0.387   131.89
1944.94    0.379   131.69
1945.94    0.371   131.49
1946.94    0.363   131.27
1947.94    0.355   131.05
1948.94    0.347   130.82
1949.94    0.339   130.57
1950.94    0.330   130.32
1951.94    0.322   130.05
1952.94    0.313   129.76
1953.94    0.304   129.46
1954.94    0.296   129.14
1955.94    0.287   128.81
1956.94    0.278   128.45
1957.94    0.269   128.06
1958.94    0.260   127.65
1959.94    0.250   127.21
1960.94    0.241   126.74
1961.94    0.231   126.22
1962.94    0.222   125.66
1963.94    0.212   125.05
1964.94    0.202   124.39
1965.94    0.192   123.65
1966.94    0.182   122.83
1967.94    0.172   121.92
1968.94    0.162   120.89
1969.94    0.152   119.72
1970.94    0.141   118.39
1971.94    0.131   116.83
1972.94    0.120   115.01
1973.94    0.110   112.85
1974.94    0.099   110.22
1975.94    0.089   106.99
1976.94    0.079   102.91
1977.94    0.069    97.67
1978.94    0.060    90.77
1979.94    0.052    81.59
1980.94    0.046    69.44
1981.94    0.042    54.21
1982.94    0.041    37.21
1983.94    0.044    21.03
1984.94    0.049     7.60
1985.94    0.057   357.25
1986.94    0.065   349.42
1987.94    0.074   343.42
1988.94    0.082   338.70
1989.94    0.091   334.86
1990.94    0.098   331.63
1991.94    0.104   328.82
1992.94    0.108   326.26
1993.94    0.109   323.83
1994.94    0.108   321.42
1995.94    0.104   318.90
1996.94    0.098   316.11
1997.94    0.089   312.84
1998.94    0.079   308.78
1999.94    0.067   303.40
2000.94    0.056   295.79
2001.94    0.045   284.31
2002.94    0.036   266.54
2003.94    0.033   241.75
2004.94    0.036   216.35
2005.94    0.044   197.61
2006.94    0.055   185.54
2007.94    0.067   177.71
2008.94    0.080   172.37
2009.94    0.093   168.52
2010.94    0.106   165.63
2011.94    0.120   163.38
2012.94    0.133   161.58
2013.94    0.146   160.09
2014.94    0.158   158.85
2015.94    0.171   157.79
2016.94    0.183   156.88
2017.94    0.195   156.08
2018.94    0.207   155.37
2019.94    0.219   154.74
2020.94    0.231   154.17
2021.94    0.242   153.66
2022.94    0.253   153.19
2023.94    0.264   152.76
2024.94    0.275   152.37
2025.94    0.286   152.00
2026.94    0.296   151.66
2027.94    0.306   151.35
2028.94    0.316   151.05
2029.94    0.326   150.78
2030.94    0.336   150.51
2031.94    0.346   150.27
2032.94    0.355   150.03
2033.94    0.365   149.81
2034.94    0.374   149.60
2035.94    0.383   149.40
2036.94    0.392   149.21
2037.94    0.401   149.03
2038.94    0.409   148.85
2039.94    0.418   148.69
2040.94    0.426   148.53
2041.94    0.434   148.37
2042.94    0.442   148.22
2043.94    0.450   148.08
2044.94    0.458   147.94
2045.94    0.466   147.80
2046.94    0.474   147.68
2047.94    0.481   147.55
2048.94    0.489   147.43
2049.94    0.496   147.31
2050.94    0.503   147.19
2051.94    0.510   147.08
2052.94    0.517   146.97
2053.94    0.524   146.87
2054.94    0.531   146.77
2055.94    0.538   146.67
2056.94    0.544   146.57
2057.94    0.551   146.47
2058.94    0.557   146.38
2059.94    0.563   146.29
2060.94    0.570   146.20
2061.94    0.576   146.11
2062.94    0.582   146.02
2063.94    0.588   145.94
2064.94    0.594   145.86
2065.94    0.599   145.78
2066.94    0.605   145.70
2067.94    0.611   145.62
2068.94    0.616   145.55
2069.94    0.622   145.47
2070.94    0.627   145.40
2071.94    0.632   145.33
2072.94    0.638   145.25
2073.94    0.643   145.18
2074.94    0.648   145.12
2075.94    0.653   145.05
2076.94    0.658   144.98
2077.94    0.663   144.91
2078.94    0.667   144.85
2079.94    0.672   144.79
2080.94    0.677   144.72
2081.94    0.681   144.66
2082.94    0.686   144.60
2083.94    0.690   144.54
2084.94    0.694   144.48
2085.94    0.699   144.42
2086.94    0.703   144.36
2087.94    0.707   144.30
2088.94    0.711   144.25
2089.94    0.715   144.19
2090.94    0.719   144.14
2091.94    0.723   144.08
2092.94    0.727   144.03
2093.94    0.730   143.97
2094.94    0.734   143.92
2095.94    0.738   143.87
2096.94    0.741   143.81
2097.94    0.745   143.76
2098.94    0.748   143.71
2099.94    0.751   143.66
2100.94    0.755   143.61
2101.94    0.758   143.56
2102.94    0.761   143.51
2103.94    0.764   143.46
2104.94    0.767   143.41
2105.94    0.770   143.36
2106.94    0.773   143.31
2107.94    0.776   143.27
2108.94    0.779   143.22
2109.94    0.782   143.17
2110.94    0.784   143.12
2111.94    0.787   143.08
2112.94    0.790   143.03
2113.94    0.792   142.99
2114.94    0.795   142.94
2115.94    0.797   142.90
2116.94    0.800   142.85
2117.94    0.802   142.81
2118.94    0.804   142.76
2119.94    0.806   142.72
2120.94    0.808   142.67
2121.94    0.811   142.63
2122.94    0.813   142.59
2123.94    0.815   142.54
2124.94    0.817   142.50
2125.94    0.818   142.46
2126.94    0.820   142.41
2127.94    0.822   142.37
2128.94    0.824   142.33
2129.94    0.825   142.29
2130.94    0.827   142.24
2131.94    0.829   142.20
2132.94    0.830   142.16
2133.94    0.832   142.12
2134.94    0.833   142.08
2135.94    0.834   142.04
2136.94    0.836   142.00
2137.94    0.837   141.96
2138.94    0.838   141.91
2139.94    0.839   141.87
2140.94    0.841   141.83
2141.94    0.842   141.79
2142.94    0.843   141.75
2143.94    0.844   141.71
2144.94    0.844   141.67
2145.94    0.845   141.63
2146.94    0.846   141.59
2147.94    0.847   141.55
2148.94    0.848   141.51
2149.94    0.848   141.47
2150.94    0.849   141.43
2151.94    0.850   141.39
2152.94    0.850   141.35
2153.94    0.851   141.31
2154.94    0.851   141.27
2155.94    0.851   141.23
2156.94    0.852   141.19
2157.94    0.852   141.15
2158.94    0.852   141.11
2159.94    0.852   141.08
2160.94    0.853   141.04
2161.94    0.853   141.00
2162.94    0.853   140.96
2163.94    0.853   140.92
2164.94    0.853   140.88
2165.94    0.852   140.84
2166.94    0.852   140.80
2167.94    0.852   140.76
2168.94    0.852   140.72
2169.94    0.852   140.68
2170.94    0.851   140.64
2171.94    0.851   140.60
2172.94    0.850   140.56
2173.94    0.850   140.52
2174.94    0.849   140.48
2175.94    0.849   140.44
2176.94    0.848   140.40
2177.94    0.848   140.36
2178.94    0.847   140.32
2179.94    0.846   140.28
2180.94    0.845   140.24
2181.94    0.844   140.20
2182.94    0.843   140.16
2183.94    0.843   140.12
2184.94    0.842   140.08
2185.94    0.840   140.04
2186.94    0.839   140.00
2187.94    0.838   139.96
2188.94    0.837   139.92
2189.94    0.836   139.88
2190.94    0.835   139.84
2191.94    0.833   139.80
2192.94    0.832   139.76
2193.94    0.830   139.71
2194.94    0.829   139.67
2195.94    0.827   139.63
2196.94    0.826   139.59
2197.94    0.824   139.55
2198.94    0.823   139.50
2199.94    0.821   139.46
2200.94    0.819   139.42
2201.94    0.817   139.38






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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.


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Report created: 2026-06-25 18:02:44



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