Double Star Calculator - Orbit

Orbital Elements for COU99
WDS: COU99 WDS ID/Discoverer
P: 321.300 Orbital period (years)
a: 0.599 Semi-major axis (arcseconds)
i: 146.2 Inclination (degrees)
Ω: 39.7 Longitude of ascending node (degrees)
T: 1902.000 Epoch of periastron passage (year)
e: 0.128 Eccentricity
ω: 58.6 Longitude of periastron (degrees)
Start-Year: 1864.35 Year
End-Year: 2185.65 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU99
Position: 144313.12+224547.5 Epoch-2000 right ascension and declination
WDS-ID: 14432+2246 WDS designation
Discoverer Code: COU99 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 11.0 Magnitude of the primary
V2: 11.5 Magnitude of the secondary
Equinox: Equinox
Date: 2016 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Ksr2021 Reference

Double Star Orbit for COU99



WDS 6th Orbit including measures of COU99

-- 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 COU99
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.640   197.15
--------------------------
1864.35    0.547    35.28
1865.35    0.545    34.16
1866.35    0.543    33.04
1867.35    0.542    31.92
1868.35    0.540    30.78
1869.35    0.538    29.64
1870.35    0.536    28.49
1871.35    0.534    27.34
1872.35    0.532    26.17
1873.35    0.530    24.99
1874.35    0.528    23.81
1875.35    0.525    22.61
1876.35    0.523    21.41
1877.35    0.521    20.19
1878.35    0.518    18.96
1879.35    0.516    17.72
1880.35    0.513    16.47
1881.35    0.511    15.21
1882.35    0.508    13.94
1883.35    0.506    12.65
1884.35    0.503    11.35
1885.35    0.501    10.03
1886.35    0.498     8.70
1887.35    0.496     7.36
1888.35    0.493     6.01
1889.35    0.490     4.64
1890.35    0.488     3.25
1891.35    0.485     1.85
1892.35    0.483     0.44
1893.35    0.480   359.01
1894.35    0.477   357.56
1895.35    0.475   356.10
1896.35    0.473   354.62
1897.35    0.470   353.13
1898.35    0.468   351.63
1899.35    0.465   350.10
1900.35    0.463   348.57
1901.35    0.461   347.02
1902.35    0.459   345.45
1903.35    0.457   343.87
1904.35    0.455   342.28
1905.35    0.453   340.67
1906.35    0.451   339.05
1907.35    0.450   337.42
1908.35    0.448   335.78
1909.35    0.447   334.12
1910.35    0.446   332.46
1911.35    0.444   330.78
1912.35    0.443   329.10
1913.35    0.442   327.41
1914.35    0.442   325.72
1915.35    0.441   324.02
1916.35    0.441   322.31
1917.35    0.440   320.60
1918.35    0.440   318.89
1919.35    0.440   317.18
1920.35    0.440   315.47
1921.35    0.440   313.76
1922.35    0.441   312.05
1923.35    0.441   310.35
1924.35    0.442   308.65
1925.35    0.443   306.95
1926.35    0.444   305.27
1927.35    0.445   303.59
1928.35    0.446   301.91
1929.35    0.447   300.25
1930.35    0.449   298.60
1931.35    0.450   296.96
1932.35    0.452   295.34
1933.35    0.454   293.73
1934.35    0.456   292.13
1935.35    0.458   290.54
1936.35    0.461   288.97
1937.35    0.463   287.42
1938.35    0.465   285.88
1939.35    0.468   284.36
1940.35    0.471   282.85
1941.35    0.473   281.37
1942.35    0.476   279.90
1943.35    0.479   278.44
1944.35    0.482   277.01
1945.35    0.485   275.59
1946.35    0.488   274.19
1947.35    0.491   272.81
1948.35    0.494   271.45
1949.35    0.498   270.10
1950.35    0.501   268.77
1951.35    0.504   267.46
1952.35    0.508   266.16
1953.35    0.511   264.89
1954.35    0.514   263.62
1955.35    0.518   262.38
1956.35    0.521   261.15
1957.35    0.524   259.94
1958.35    0.528   258.74
1959.35    0.531   257.56
1960.35    0.535   256.39
1961.35    0.538   255.24
1962.35    0.541   254.10
1963.35    0.545   252.98
1964.35    0.548   251.87
1965.35    0.551   250.77
1966.35    0.555   249.69
1967.35    0.558   248.62
1968.35    0.561   247.56
1969.35    0.564   246.51
1970.35    0.567   245.48
1971.35    0.570   244.45
1972.35    0.573   243.44
1973.35    0.576   242.44
1974.35    0.579   241.45
1975.35    0.582   240.46
1976.35    0.585   239.49
1977.35    0.588   238.53
1978.35    0.591   237.57
1979.35    0.593   236.63
1980.35    0.596   235.69
1981.35    0.598   234.76
1982.35    0.601   233.84
1983.35    0.603   232.92
1984.35    0.606   232.02
1985.35    0.608   231.12
1986.35    0.610   230.22
1987.35    0.612   229.33
1988.35    0.614   228.45
1989.35    0.616   227.58
1990.35    0.618   226.71
1991.35    0.620   225.84
1992.35    0.622   224.98
1993.35    0.623   224.13
1994.35    0.625   223.28
1995.35    0.627   222.43
1996.35    0.628   221.59
1997.35    0.630   220.75
1998.35    0.631   219.92
1999.35    0.632   219.09
2000.35    0.633   218.26
2001.35    0.635   217.44
2002.35    0.636   216.62
2003.35    0.637   215.80
2004.35    0.637   214.98
2005.35    0.638   214.17
2006.35    0.639   213.35
2007.35    0.640   212.54
2008.35    0.640   211.74
2009.35    0.641   210.93
2010.35    0.641   210.12
2011.35    0.642   209.32
2012.35    0.642   208.51
2013.35    0.642   207.71
2014.35    0.643   206.91
2015.35    0.643   206.11
2016.35    0.643   205.30
2017.35    0.643   204.50
2018.35    0.643   203.70
2019.35    0.643   202.90
2020.35    0.643   202.10
2021.35    0.642   201.29
2022.35    0.642   200.49
2023.35    0.642   199.69
2024.35    0.641   198.88
2025.35    0.641   198.08
2026.35    0.640   197.27
2027.35    0.640   196.46
2028.35    0.639   195.65
2029.35    0.638   194.84
2030.35    0.638   194.02
2031.35    0.637   193.21
2032.35    0.636   192.39
2033.35    0.635   191.57
2034.35    0.634   190.74
2035.35    0.633   189.92
2036.35    0.632   189.09
2037.35    0.631   188.26
2038.35    0.630   187.43
2039.35    0.629   186.59
2040.35    0.628   185.75
2041.35    0.626   184.91
2042.35    0.625   184.06
2043.35    0.624   183.21
2044.35    0.622   182.36
2045.35    0.621   181.50
2046.35    0.620   180.64
2047.35    0.618   179.78
2048.35    0.617   178.91
2049.35    0.615   178.03
2050.35    0.614   177.16
2051.35    0.612   176.28
2052.35    0.611   175.39
2053.35    0.609   174.50
2054.35    0.608   173.61
2055.35    0.606   172.71
2056.35    0.605   171.80
2057.35    0.603   170.90
2058.35    0.602   169.98
2059.35    0.600   169.06
2060.35    0.598   168.14
2061.35    0.597   167.21
2062.35    0.595   166.28
2063.35    0.594   165.34
2064.35    0.592   164.40
2065.35    0.590   163.45
2066.35    0.589   162.50
2067.35    0.587   161.54
2068.35    0.586   160.57
2069.35    0.584   159.61
2070.35    0.582   158.63
2071.35    0.581   157.65
2072.35    0.579   156.67
2073.35    0.578   155.68
2074.35    0.576   154.68
2075.35    0.575   153.68
2076.35    0.573   152.68
2077.35    0.572   151.67
2078.35    0.571   150.65
2079.35    0.569   149.63
2080.35    0.568   148.61
2081.35    0.566   147.58
2082.35    0.565   146.54
2083.35    0.564   145.50
2084.35    0.563   144.46
2085.35    0.561   143.41
2086.35    0.560   142.36
2087.35    0.559   141.30
2088.35    0.558   140.24
2089.35    0.557   139.17
2090.35    0.556   138.10
2091.35    0.555   137.03
2092.35    0.554   135.95
2093.35    0.553   134.87
2094.35    0.552   133.79
2095.35    0.552   132.70
2096.35    0.551   131.61
2097.35    0.550   130.51
2098.35    0.549   129.42
2099.35    0.549   128.32
2100.35    0.548   127.22
2101.35    0.548   126.12
2102.35    0.547   125.01
2103.35    0.547   123.90
2104.35    0.546   122.79
2105.35    0.546   121.68
2106.35    0.546   120.57
2107.35    0.546   119.46
2108.35    0.545   118.35
2109.35    0.545   117.23
2110.35    0.545   116.12
2111.35    0.545   115.00
2112.35    0.545   113.89
2113.35    0.545   112.77
2114.35    0.545   111.65
2115.35    0.545   110.54
2116.35    0.545   109.42
2117.35    0.545   108.31
2118.35    0.546   107.20
2119.35    0.546   106.08
2120.35    0.546   104.97
2121.35    0.546   103.86
2122.35    0.547   102.75
2123.35    0.547   101.65
2124.35    0.548   100.54
2125.35    0.548    99.44
2126.35    0.548    98.33
2127.35    0.549    97.23
2128.35    0.549    96.14
2129.35    0.550    95.04
2130.35    0.550    93.94
2131.35    0.551    92.85
2132.35    0.552    91.76
2133.35    0.552    90.67
2134.35    0.553    89.59
2135.35    0.553    88.51
2136.35    0.554    87.42
2137.35    0.555    86.35
2138.35    0.555    85.27
2139.35    0.556    84.20
2140.35    0.556    83.13
2141.35    0.557    82.06
2142.35    0.558    80.99
2143.35    0.558    79.93
2144.35    0.559    78.86
2145.35    0.559    77.80
2146.35    0.560    76.75
2147.35    0.560    75.69
2148.35    0.561    74.64
2149.35    0.561    73.58
2150.35    0.562    72.53
2151.35    0.562    71.48
2152.35    0.563    70.44
2153.35    0.563    69.39
2154.35    0.563    68.35
2155.35    0.564    67.30
2156.35    0.564    66.26
2157.35    0.564    65.22
2158.35    0.564    64.18
2159.35    0.564    63.14
2160.35    0.565    62.10
2161.35    0.565    61.06
2162.35    0.565    60.02
2163.35    0.565    58.98
2164.35    0.564    57.94
2165.35    0.564    56.90
2166.35    0.564    55.86
2167.35    0.564    54.82
2168.35    0.563    53.78
2169.35    0.563    52.73
2170.35    0.562    51.68
2171.35    0.562    50.64
2172.35    0.561    49.59
2173.35    0.561    48.53
2174.35    0.560    47.48
2175.35    0.559    46.42
2176.35    0.558    45.36
2177.35    0.557    44.29
2178.35    0.556    43.22
2179.35    0.555    42.15
2180.35    0.554    41.07
2181.35    0.553    39.99
2182.35    0.551    38.90
2183.35    0.550    37.81
2184.35    0.549    36.71
2185.35    0.547    35.61






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 17:08:17



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