Double Star Calculator - Orbit

Orbital Elements for COU936

WDS:	COU936	WDS ID/Discoverer
P:	180.500	Orbital period (years)
a:	0.565	Semi-major axis (arcseconds)
i:	108.6	Inclination (degrees)
Ω:	45.0	Longitude of ascending node (degrees)
T:	1945.300	Epoch of periastron passage (year)
e:	0.738	Eccentricity
ω:	8.4	Longitude of periastron (degrees)
Start-Year:	1934.75	Year
End-Year:	2115.25	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU936
Position:	092900.67+191718.6	Epoch-2000 right ascension and declination
WDS-ID:	09290+1917	WDS designation
Discoverer Code:	COU936	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	81899	HD catalog number
Hipparcos number:	46501	Hipparcos catalog number
V1:	8.42	Magnitude of the primary
V2:	9.96	Magnitude of the secondary
Equinox:		Equinox
Date:		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:	BAE2021	Reference

Double Star Orbit for COU936

WDS 6th Orbit including measures of COU936

-- 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 COU936

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.973   223.61
--------------------------
1934.75    0.118   162.72
1935.75    0.103   151.45
1936.75    0.093   137.04
1937.75    0.089   120.19
1938.75    0.091   103.08
1939.75    0.100    88.02
1940.75    0.113    75.89
1941.75    0.127    66.32
1942.75    0.139    58.58
1943.75    0.147    51.93
1944.75    0.149    45.74
1945.75    0.143    39.36
1946.75    0.129    32.00
1947.75    0.111    22.48
1948.75    0.092     9.00
1949.75    0.077   349.33
1950.75    0.072   324.07
1951.75    0.081   300.08
1952.75    0.099   282.74
1953.75    0.122   271.32
1954.75    0.147   263.66
1955.75    0.173   258.27
1956.75    0.199   254.29
1957.75    0.225   251.23
1958.75    0.250   248.79
1959.75    0.275   246.79
1960.75    0.299   245.12
1961.75    0.322   243.70
1962.75    0.345   242.47
1963.75    0.368   241.39
1964.75    0.389   240.43
1965.75    0.410   239.58
1966.75    0.431   238.80
1967.75    0.451   238.09
1968.75    0.470   237.45
1969.75    0.489   236.85
1970.75    0.507   236.30
1971.75    0.525   235.78
1972.75    0.542   235.30
1973.75    0.559   234.85
1974.75    0.575   234.42
1975.75    0.591   234.02
1976.75    0.607   233.64
1977.75    0.622   233.28
1978.75    0.636   232.93
1979.75    0.651   232.60
1980.75    0.664   232.28
1981.75    0.678   231.98
1982.75    0.691   231.68
1983.75    0.704   231.40
1984.75    0.716   231.13
1985.75    0.728   230.87
1986.75    0.740   230.61
1987.75    0.751   230.37
1988.75    0.762   230.13
1989.75    0.772   229.89
1990.75    0.783   229.67
1991.75    0.793   229.45
1992.75    0.802   229.23
1993.75    0.812   229.02
1994.75    0.821   228.82
1995.75    0.830   228.61
1996.75    0.838   228.42
1997.75    0.846   228.22
1998.75    0.854   228.03
1999.75    0.862   227.85
2000.75    0.869   227.67
2001.75    0.876   227.49
2002.75    0.883   227.31
2003.75    0.890   227.13
2004.75    0.896   226.96
2005.75    0.902   226.79
2006.75    0.908   226.63
2007.75    0.914   226.46
2008.75    0.919   226.30
2009.75    0.924   226.14
2010.75    0.929   225.98
2011.75    0.933   225.82
2012.75    0.937   225.66
2013.75    0.941   225.51
2014.75    0.945   225.35
2015.75    0.949   225.20
2016.75    0.952   225.05
2017.75    0.955   224.90
2018.75    0.958   224.75
2019.75    0.961   224.60
2020.75    0.963   224.45
2021.75    0.965   224.30
2022.75    0.967   224.16
2023.75    0.969   224.01
2024.75    0.971   223.86
2025.75    0.972   223.72
2026.75    0.973   223.57
2027.75    0.974   223.43
2028.75    0.974   223.29
2029.75    0.975   223.14
2030.75    0.975   223.00
2031.75    0.975   222.85
2032.75    0.974   222.71
2033.75    0.974   222.56
2034.75    0.973   222.42
2035.75    0.972   222.27
2036.75    0.971   222.13
2037.75    0.970   221.98
2038.75    0.968   221.84
2039.75    0.966   221.69
2040.75    0.964   221.54
2041.75    0.962   221.40
2042.75    0.960   221.25
2043.75    0.957   221.10
2044.75    0.954   220.95
2045.75    0.951   220.80
2046.75    0.948   220.65
2047.75    0.944   220.49
2048.75    0.940   220.34
2049.75    0.936   220.18
2050.75    0.932   220.03
2051.75    0.928   219.87
2052.75    0.923   219.71
2053.75    0.918   219.55
2054.75    0.913   219.38
2055.75    0.908   219.22
2056.75    0.902   219.05
2057.75    0.896   218.88
2058.75    0.890   218.71
2059.75    0.884   218.53
2060.75    0.878   218.36
2061.75    0.871   218.18
2062.75    0.864   218.00
2063.75    0.857   217.81
2064.75    0.849   217.62
2065.75    0.842   217.43
2066.75    0.834   217.24
2067.75    0.826   217.04
2068.75    0.817   216.83
2069.75    0.809   216.63
2070.75    0.800   216.41
2071.75    0.791   216.20
2072.75    0.782   215.98
2073.75    0.772   215.75
2074.75    0.762   215.52
2075.75    0.752   215.28
2076.75    0.742   215.03
2077.75    0.731   214.78
2078.75    0.720   214.52
2079.75    0.709   214.25
2080.75    0.697   213.97
2081.75    0.686   213.69
2082.75    0.673   213.39
2083.75    0.661   213.08
2084.75    0.649   212.76
2085.75    0.636   212.43
2086.75    0.622   212.08
2087.75    0.609   211.72
2088.75    0.595   211.34
2089.75    0.581   210.95
2090.75    0.567   210.53
2091.75    0.552   210.09
2092.75    0.537   209.63
2093.75    0.521   209.14
2094.75    0.506   208.62
2095.75    0.489   208.07
2096.75    0.473   207.47
2097.75    0.456   206.84
2098.75    0.439   206.16
2099.75    0.422   205.42
2100.75    0.404   204.61
2101.75    0.386   203.73
2102.75    0.367   202.76
2103.75    0.348   201.69
2104.75    0.329   200.49
2105.75    0.309   199.14
2106.75    0.289   197.61
2107.75    0.269   195.84
2108.75    0.248   193.79
2109.75    0.228   191.36
2110.75    0.207   188.45
2111.75    0.186   184.88
2112.75    0.165   180.43
2113.75    0.146   174.73
2114.75    0.127   167.29

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 16:18:38