Double Star Calculator - Orbit

Orbital Elements for COU2542
WDS: COU2542 WDS ID/Discoverer
P: 202.100 Orbital period (years)
a: 0.477 Semi-major axis (arcseconds)
i: 76.2 Inclination (degrees)
Ω: 76.5 Longitude of ascending node (degrees)
T: 2023.900 Epoch of periastron passage (year)
e: 0.374 Eccentricity
ω: 136.3 Longitude of periastron (degrees)
Start-Year: 1923.95 Year
End-Year: 2126.05 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU2542
Position: 205257.26+425825.7 Epoch-2000 right ascension and declination
WDS-ID: 20530+4258 WDS designation
Discoverer Code: COU2542 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 103067 Hipparcos catalog number
V1: 10.46 Magnitude of the primary
V2: 12.03 Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: BAE2021 Reference

Double Star Orbit for COU2542



WDS 6th Orbit including measures of COU2542

-- 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 COU2542
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.255   247.77
--------------------------
1923.95    0.493    64.07
1924.95    0.499    64.44
1925.95    0.505    64.79
1926.95    0.511    65.14
1927.95    0.516    65.48
1928.95    0.522    65.81
1929.95    0.527    66.14
1930.95    0.532    66.46
1931.95    0.537    66.77
1932.95    0.542    67.08
1933.95    0.546    67.38
1934.95    0.550    67.68
1935.95    0.554    67.98
1936.95    0.558    68.27
1937.95    0.562    68.55
1938.95    0.566    68.83
1939.95    0.569    69.11
1940.95    0.572    69.39
1941.95    0.575    69.66
1942.95    0.577    69.93
1943.95    0.580    70.20
1944.95    0.582    70.46
1945.95    0.584    70.73
1946.95    0.586    70.99
1947.95    0.587    71.25
1948.95    0.588    71.51
1949.95    0.589    71.77
1950.95    0.590    72.03
1951.95    0.591    72.28
1952.95    0.591    72.54
1953.95    0.591    72.80
1954.95    0.591    73.05
1955.95    0.590    73.31
1956.95    0.589    73.57
1957.95    0.588    73.83
1958.95    0.587    74.09
1959.95    0.585    74.35
1960.95    0.584    74.61
1961.95    0.581    74.87
1962.95    0.579    75.14
1963.95    0.576    75.41
1964.95    0.573    75.68
1965.95    0.570    75.95
1966.95    0.566    76.23
1967.95    0.562    76.51
1968.95    0.558    76.80
1969.95    0.553    77.09
1970.95    0.548    77.39
1971.95    0.543    77.69
1972.95    0.537    78.00
1973.95    0.531    78.31
1974.95    0.525    78.63
1975.95    0.518    78.96
1976.95    0.511    79.30
1977.95    0.504    79.65
1978.95    0.496    80.00
1979.95    0.488    80.37
1980.95    0.480    80.76
1981.95    0.471    81.16
1982.95    0.461    81.57
1983.95    0.452    82.00
1984.95    0.442    82.45
1985.95    0.431    82.92
1986.95    0.421    83.41
1987.95    0.409    83.93
1988.95    0.398    84.48
1989.95    0.386    85.07
1990.95    0.373    85.69
1991.95    0.361    86.35
1992.95    0.347    87.07
1993.95    0.334    87.84
1994.95    0.320    88.68
1995.95    0.306    89.60
1996.95    0.291    90.61
1997.95    0.276    91.73
1998.95    0.260    92.97
1999.95    0.245    94.38
2000.95    0.229    95.98
2001.95    0.213    97.82
2002.95    0.196    99.97
2003.95    0.180   102.50
2004.95    0.164   105.54
2005.95    0.148   109.24
2006.95    0.132   113.84
2007.95    0.117   119.64
2008.95    0.104   127.05
2009.95    0.092   136.53
2010.95    0.083   148.37
2011.95    0.078   162.30
2012.95    0.078   177.08
2013.95    0.083   190.99
2014.95    0.092   202.80
2015.95    0.104   212.25
2016.95    0.117   219.66
2017.95    0.132   225.48
2018.95    0.147   230.11
2019.95    0.162   233.87
2020.95    0.178   236.97
2021.95    0.193   239.58
2022.95    0.208   241.81
2023.95    0.222   243.75
2024.95    0.236   245.46
2025.95    0.249   246.99
2026.95    0.261   248.38
2027.95    0.272   249.64
2028.95    0.282   250.81
2029.95    0.291   251.90
2030.95    0.300   252.93
2031.95    0.307   253.90
2032.95    0.313   254.83
2033.95    0.319   255.73
2034.95    0.323   256.60
2035.95    0.327   257.44
2036.95    0.330   258.28
2037.95    0.331   259.10
2038.95    0.332   259.91
2039.95    0.333   260.72
2040.95    0.332   261.53
2041.95    0.331   262.35
2042.95    0.328   263.18
2043.95    0.326   264.01
2044.95    0.323   264.87
2045.95    0.319   265.74
2046.95    0.314   266.63
2047.95    0.309   267.56
2048.95    0.304   268.51
2049.95    0.298   269.50
2050.95    0.292   270.53
2051.95    0.286   271.60
2052.95    0.279   272.73
2053.95    0.272   273.91
2054.95    0.264   275.16
2055.95    0.257   276.48
2056.95    0.249   277.88
2057.95    0.241   279.37
2058.95    0.233   280.96
2059.95    0.225   282.67
2060.95    0.217   284.50
2061.95    0.209   286.46
2062.95    0.201   288.59
2063.95    0.194   290.89
2064.95    0.186   293.38
2065.95    0.179   296.08
2066.95    0.171   299.01
2067.95    0.165   302.20
2068.95    0.158   305.64
2069.95    0.152   309.37
2070.95    0.147   313.39
2071.95    0.142   317.69
2072.95    0.138   322.25
2073.95    0.135   327.06
2074.95    0.133   332.05
2075.95    0.132   337.18
2076.95    0.131   342.36
2077.95    0.132   347.53
2078.95    0.134   352.60
2079.95    0.137   357.51
2080.95    0.140     2.20
2081.95    0.144     6.64
2082.95    0.149    10.80
2083.95    0.155    14.66
2084.95    0.162    18.24
2085.95    0.168    21.54
2086.95    0.176    24.58
2087.95    0.183    27.37
2088.95    0.191    29.94
2089.95    0.199    32.29
2090.95    0.207    34.46
2091.95    0.216    36.47
2092.95    0.225    38.31
2093.95    0.233    40.02
2094.95    0.242    41.61
2095.95    0.251    43.08
2096.95    0.260    44.45
2097.95    0.269    45.73
2098.95    0.278    46.93
2099.95    0.287    48.05
2100.95    0.296    49.10
2101.95    0.305    50.10
2102.95    0.314    51.03
2103.95    0.323    51.92
2104.95    0.332    52.75
2105.95    0.340    53.55
2106.95    0.349    54.30
2107.95    0.358    55.02
2108.95    0.366    55.70
2109.95    0.375    56.36
2110.95    0.383    56.98
2111.95    0.391    57.58
2112.95    0.399    58.15
2113.95    0.407    58.71
2114.95    0.415    59.24
2115.95    0.423    59.75
2116.95    0.430    60.24
2117.95    0.438    60.72
2118.95    0.445    61.18
2119.95    0.452    61.62
2120.95    0.459    62.05
2121.95    0.466    62.47
2122.95    0.473    62.88
2123.95    0.480    63.27
2124.95    0.486    63.66
2125.95    0.492    64.03






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 18:19:46



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