Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:25:53

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: 1865.0 Year
End-Year: 2185.0 Year
Epoch: 2025.0 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' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for COU99



WDS 6th Orbit including measures of COU99

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)


Ephemeris of COU99
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.641    198.4
-------------------------
1865.0     0.546     34.6
1866.0     0.544     33.4
1867.0     0.542     32.3
1868.0     0.540     31.2
1869.0     0.539     30.0
1870.0     0.537     28.9
1871.0     0.535     27.7
1872.0     0.533     26.6
1873.0     0.530     25.4
1874.0     0.528     24.2
1875.0     0.526     23.0
1876.0     0.524     21.8
1877.0     0.522     20.6
1878.0     0.519     19.4
1879.0     0.517     18.2
1880.0     0.514     16.9
1881.0     0.512     15.7
1882.0     0.509     14.4
1883.0     0.507     13.1
1884.0     0.504     11.8
1885.0     0.502     10.5
1886.0     0.499      9.2
1887.0     0.497      7.8
1888.0     0.494      6.5
1889.0     0.491      5.1
1890.0     0.489      3.7
1891.0     0.486      2.3
1892.0     0.483      0.9
1893.0     0.481    359.5
1894.0     0.478    358.1
1895.0     0.476    356.6
1896.0     0.473    355.1
1897.0     0.471    353.7
1898.0     0.469    352.2
1899.0     0.466    350.6
1900.0     0.464    349.1
1901.0     0.462    347.6
1902.0     0.460    346.0
1903.0     0.458    344.4
1904.0     0.456    342.8
1905.0     0.454    341.2
1906.0     0.452    339.6
1907.0     0.450    338.0
1908.0     0.449    336.4
1909.0     0.447    334.7
1910.0     0.446    333.0
1911.0     0.445    331.4
1912.0     0.444    329.7
1913.0     0.443    328.0
1914.0     0.442    326.3
1915.0     0.441    324.6
1916.0     0.441    322.9
1917.0     0.440    321.2
1918.0     0.440    319.5
1919.0     0.440    317.8
1920.0     0.440    316.1
1921.0     0.440    314.4
1922.0     0.440    312.6
1923.0     0.441    310.9
1924.0     0.442    309.2
1925.0     0.442    307.5
1926.0     0.443    305.9
1927.0     0.444    304.2
1928.0     0.445    302.5
1929.0     0.447    300.8
1930.0     0.448    299.2
1931.0     0.450    297.5
1932.0     0.452    295.9
1933.0     0.454    294.3
1934.0     0.455    292.7
1935.0     0.458    291.1
1936.0     0.460    289.5
1937.0     0.462    288.0
1938.0     0.465    286.4
1939.0     0.467    284.9
1940.0     0.470    283.4
1941.0     0.472    281.9
1942.0     0.475    280.4
1943.0     0.478    279.0
1944.0     0.481    277.5
1945.0     0.484    276.1
1946.0     0.487    274.7
1947.0     0.490    273.3
1948.0     0.493    271.9
1949.0     0.496    270.6
1950.0     0.500    269.2
1951.0     0.503    267.9
1952.0     0.506    266.6
1953.0     0.510    265.3
1954.0     0.513    264.1
1955.0     0.516    262.8
1956.0     0.520    261.6
1957.0     0.523    260.4
1958.0     0.527    259.2
1959.0     0.530    258.0
1960.0     0.533    256.8
1961.0     0.537    255.6
1962.0     0.540    254.5
1963.0     0.544    253.4
1964.0     0.547    252.3
1965.0     0.550    251.2
1966.0     0.553    250.1
1967.0     0.557    249.0
1968.0     0.560    247.9
1969.0     0.563    246.9
1970.0     0.566    245.8
1971.0     0.569    244.8
1972.0     0.572    243.8
1973.0     0.575    242.8
1974.0     0.578    241.8
1975.0     0.581    240.8
1976.0     0.584    239.8
1977.0     0.587    238.9
1978.0     0.590    237.9
1979.0     0.592    237.0
1980.0     0.595    236.0
1981.0     0.597    235.1
1982.0     0.600    234.2
1983.0     0.602    233.2
1984.0     0.605    232.3
1985.0     0.607    231.4
1986.0     0.609    230.5
1987.0     0.611    229.6
1988.0     0.613    228.8
1989.0     0.616    227.9
1990.0     0.617    227.0
1991.0     0.619    226.1
1992.0     0.621    225.3
1993.0     0.623    224.4
1994.0     0.625    223.6
1995.0     0.626    222.7
1996.0     0.628    221.9
1997.0     0.629    221.0
1998.0     0.630    220.2
1999.0     0.632    219.4
2000.0     0.633    218.6
2001.0     0.634    217.7
2002.0     0.635    216.9
2003.0     0.636    216.1
2004.0     0.637    215.3
2005.0     0.638    214.5
2006.0     0.639    213.6
2007.0     0.640    212.8
2008.0     0.640    212.0
2009.0     0.641    211.2
2010.0     0.641    210.4
2011.0     0.642    209.6
2012.0     0.642    208.8
2013.0     0.642    208.0
2014.0     0.643    207.2
2015.0     0.643    206.4
2016.0     0.643    205.6
2017.0     0.643    204.8
2018.0     0.643    204.0
2019.0     0.643    203.2
2020.0     0.643    202.4
2021.0     0.642    201.6
2022.0     0.642    200.8
2023.0     0.642    200.0
2024.0     0.641    199.2
2025.0     0.641    198.4
2026.0     0.640    197.6
2027.0     0.640    196.7
2028.0     0.639    195.9
2029.0     0.639    195.1
2030.0     0.638    194.3
2031.0     0.637    193.5
2032.0     0.636    192.7
2033.0     0.635    191.9
2034.0     0.634    191.0
2035.0     0.633    190.2
2036.0     0.632    189.4
2037.0     0.631    188.6
2038.0     0.630    187.7
2039.0     0.629    186.9
2040.0     0.628    186.0
2041.0     0.627    185.2
2042.0     0.626    184.4
2043.0     0.624    183.5
2044.0     0.623    182.7
2045.0     0.622    181.8
2046.0     0.620    180.9
2047.0     0.619    180.1
2048.0     0.617    179.2
2049.0     0.616    178.3
2050.0     0.614    177.5
2051.0     0.613    176.6
2052.0     0.611    175.7
2053.0     0.610    174.8
2054.0     0.608    173.9
2055.0     0.607    173.0
2056.0     0.605    172.1
2057.0     0.604    171.2
2058.0     0.602    170.3
2059.0     0.601    169.4
2060.0     0.599    168.5
2061.0     0.597    167.5
2062.0     0.596    166.6
2063.0     0.594    165.7
2064.0     0.592    164.7
2065.0     0.591    163.8
2066.0     0.589    162.8
2067.0     0.588    161.9
2068.0     0.586    160.9
2069.0     0.585    159.9
2070.0     0.583    159.0
2071.0     0.581    158.0
2072.0     0.580    157.0
2073.0     0.578    156.0
2074.0     0.577    155.0
2075.0     0.575    154.0
2076.0     0.574    153.0
2077.0     0.572    152.0
2078.0     0.571    151.0
2079.0     0.570    150.0
2080.0     0.568    149.0
2081.0     0.567    147.9
2082.0     0.566    146.9
2083.0     0.564    145.9
2084.0     0.563    144.8
2085.0     0.562    143.8
2086.0     0.561    142.7
2087.0     0.560    141.7
2088.0     0.558    140.6
2089.0     0.557    139.5
2090.0     0.556    138.5
2091.0     0.555    137.4
2092.0     0.554    136.3
2093.0     0.554    135.2
2094.0     0.553    134.2
2095.0     0.552    133.1
2096.0     0.551    132.0
2097.0     0.550    130.9
2098.0     0.550    129.8
2099.0     0.549    128.7
2100.0     0.548    127.6
2101.0     0.548    126.5
2102.0     0.547    125.4
2103.0     0.547    124.3
2104.0     0.547    123.2
2105.0     0.546    122.1
2106.0     0.546    121.0
2107.0     0.546    119.8
2108.0     0.545    118.7
2109.0     0.545    117.6
2110.0     0.545    116.5
2111.0     0.545    115.4
2112.0     0.545    114.3
2113.0     0.545    113.2
2114.0     0.545    112.0
2115.0     0.545    110.9
2116.0     0.545    109.8
2117.0     0.545    108.7
2118.0     0.546    107.6
2119.0     0.546    106.5
2120.0     0.546    105.4
2121.0     0.546    104.3
2122.0     0.547    103.1
2123.0     0.547    102.0
2124.0     0.547    100.9
2125.0     0.548     99.8
2126.0     0.548     98.7
2127.0     0.549     97.6
2128.0     0.549     96.5
2129.0     0.550     95.4
2130.0     0.550     94.3
2131.0     0.551     93.2
2132.0     0.551     92.1
2133.0     0.552     91.1
2134.0     0.553     90.0
2135.0     0.553     88.9
2136.0     0.554     87.8
2137.0     0.554     86.7
2138.0     0.555     85.6
2139.0     0.556     84.6
2140.0     0.556     83.5
2141.0     0.557     82.4
2142.0     0.557     81.4
2143.0     0.558     80.3
2144.0     0.559     79.2
2145.0     0.559     78.2
2146.0     0.560     77.1
2147.0     0.560     76.1
2148.0     0.561     75.0
2149.0     0.561     74.0
2150.0     0.562     72.9
2151.0     0.562     71.9
2152.0     0.563     70.8
2153.0     0.563     69.8
2154.0     0.563     68.7
2155.0     0.564     67.7
2156.0     0.564     66.6
2157.0     0.564     65.6
2158.0     0.564     64.5
2159.0     0.564     63.5
2160.0     0.565     62.5
2161.0     0.565     61.4
2162.0     0.565     60.4
2163.0     0.565     59.3
2164.0     0.564     58.3
2165.0     0.564     57.3
2166.0     0.564     56.2
2167.0     0.564     55.2
2168.0     0.563     54.1
2169.0     0.563     53.1
2170.0     0.563     52.1
2171.0     0.562     51.0
2172.0     0.562     50.0
2173.0     0.561     48.9
2174.0     0.560     47.8
2175.0     0.559     46.8
2176.0     0.558     45.7
2177.0     0.558     44.7
2178.0     0.557     43.6
2179.0     0.555     42.5
2180.0     0.554     41.4
2181.0     0.553     40.4
2182.0     0.552     39.3
2183.0     0.550     38.2
2184.0     0.549     37.1






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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