Double Star Calculator - Orbit

Orbital Elements for COU307

WDS:	COU307	WDS ID/Discoverer
P:	147.200	Orbital period (years)
a:	0.768	Semi-major axis (arcseconds)
i:	104.7	Inclination (degrees)
Ω:	97.9	Longitude of ascending node (degrees)
T:	1964.830	Epoch of periastron passage (year)
e:	0.955	Eccentricity
ω:	277.2	Longitude of periastron (degrees)
Start-Year:	1951.4	Year
End-Year:	2098.6	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU307
Position:	151834.84+235642.8	Epoch-2000 right ascension and declination
WDS-ID:	15186+2356	WDS designation
Discoverer Code:	COU307	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.5	Magnitude of the primary
V2:	9.6	Magnitude of the secondary
Equinox:		Equinox
Date:	2022	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:	Lin2022b	Reference

Double Star Orbit for COU307

WDS 6th Orbit including measures of COU307

-- 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 COU307

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.394   349.20
--------------------------
1951.40    0.356   306.23
1952.40    0.348   305.35
1953.40    0.338   304.43
1954.40    0.328   303.45
1955.40    0.317   302.41
1956.40    0.305   301.28
1957.40    0.291   300.06
1958.40    0.276   298.71
1959.40    0.258   297.19
1960.40    0.238   295.43
1961.40    0.214   293.30
1962.40    0.184   290.55
1963.40    0.142   286.45
1964.40    0.068   276.33
1965.40    0.079    93.00
1966.40    0.123    82.60
1967.40    0.146    76.63
1968.40    0.161    72.03
1969.40    0.173    68.15
1970.40    0.183    64.71
1971.40    0.191    61.60
1972.40    0.198    58.72
1973.40    0.204    56.04
1974.40    0.210    53.51
1975.40    0.216    51.12
1976.40    0.221    48.84
1977.40    0.226    46.66
1978.40    0.230    44.57
1979.40    0.235    42.56
1980.40    0.239    40.62
1981.40    0.243    38.76
1982.40    0.247    36.95
1983.40    0.251    35.21
1984.40    0.255    33.51
1985.40    0.259    31.87
1986.40    0.263    30.28
1987.40    0.267    28.74
1988.40    0.271    27.23
1989.40    0.274    25.77
1990.40    0.278    24.35
1991.40    0.282    22.96
1992.40    0.285    21.61
1993.40    0.289    20.29
1994.40    0.293    19.01
1995.40    0.296    17.75
1996.40    0.300    16.53
1997.40    0.303    15.33
1998.40    0.307    14.17
1999.40    0.310    13.02
2000.40    0.314    11.91
2001.40    0.317    10.82
2002.40    0.320     9.75
2003.40    0.324     8.70
2004.40    0.327     7.67
2005.40    0.330     6.67
2006.40    0.334     5.69
2007.40    0.337     4.72
2008.40    0.340     3.77
2009.40    0.344     2.85
2010.40    0.347     1.93
2011.40    0.350     1.04
2012.40    0.353     0.16
2013.40    0.356   359.30
2014.40    0.359   358.45
2015.40    0.362   357.62
2016.40    0.365   356.80
2017.40    0.368   355.99
2018.40    0.371   355.20
2019.40    0.374   354.42
2020.40    0.377   353.65
2021.40    0.380   352.89
2022.40    0.383   352.15
2023.40    0.386   351.41
2024.40    0.388   350.69
2025.40    0.391   349.97
2026.40    0.394   349.27
2027.40    0.396   348.57
2028.40    0.399   347.88
2029.40    0.402   347.21
2030.40    0.404   346.54
2031.40    0.406   345.88
2032.40    0.409   345.22
2033.40    0.411   344.58
2034.40    0.414   343.94
2035.40    0.416   343.31
2036.40    0.418   342.68
2037.40    0.420   342.06
2038.40    0.422   341.45
2039.40    0.424   340.85
2040.40    0.426   340.25
2041.40    0.428   339.65
2042.40    0.430   339.06
2043.40    0.432   338.48
2044.40    0.434   337.90
2045.40    0.435   337.32
2046.40    0.437   336.75
2047.40    0.438   336.18
2048.40    0.440   335.62
2049.40    0.441   335.06
2050.40    0.443   334.50
2051.40    0.444   333.95
2052.40    0.445   333.40
2053.40    0.446   332.85
2054.40    0.447   332.31
2055.40    0.448   331.77
2056.40    0.449   331.23
2057.40    0.450   330.69
2058.40    0.450   330.16
2059.40    0.451   329.62
2060.40    0.452   329.09
2061.40    0.452   328.56
2062.40    0.452   328.03
2063.40    0.453   327.50
2064.40    0.453   326.97
2065.40    0.453   326.44
2066.40    0.453   325.91
2067.40    0.453   325.38
2068.40    0.452   324.85
2069.40    0.452   324.32
2070.40    0.451   323.78
2071.40    0.451   323.25
2072.40    0.450   322.71
2073.40    0.449   322.18
2074.40    0.448   321.64
2075.40    0.447   321.10
2076.40    0.445   320.55
2077.40    0.444   320.00
2078.40    0.442   319.45
2079.40    0.440   318.89
2080.40    0.438   318.33
2081.40    0.436   317.76
2082.40    0.434   317.19
2083.40    0.431   316.61
2084.40    0.429   316.02
2085.40    0.425   315.42
2086.40    0.422   314.82
2087.40    0.419   314.21
2088.40    0.415   313.58
2089.40    0.411   312.95
2090.40    0.407   312.30
2091.40    0.402   311.63
2092.40    0.397   310.95
2093.40    0.392   310.25
2094.40    0.386   309.53
2095.40    0.380   308.79
2096.40    0.373   308.02
2097.40    0.366   307.23
2098.40    0.358   306.40

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 17:13:54