Double Star Calculator - Orbit

Orbital Elements for COU1569
WDS: COU1569 WDS ID/Discoverer
P: 117.000 Orbital period (years)
a: 0.237 Semi-major axis (arcseconds)
i: 69.3 Inclination (degrees)
Ω: 60.7 Longitude of ascending node (degrees)
T: 1997.780 Epoch of periastron passage (year)
e: 0.494 Eccentricity
ω: 140.1 Longitude of periastron (degrees)
Start-Year: 1966.5 Year
End-Year: 2083.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU1569
Position: 100552.72+341204.0 Epoch-2000 right ascension and declination
WDS-ID: 10059+3412 WDS designation
Discoverer Code: COU1569 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 87473 HD catalog number
Hipparcos number: 49461 Hipparcos catalog number
V1: 8.8 Magnitude of the primary
V2: 8.8 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2004 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: Doc2006i Reference

Double Star Orbit for COU1569



WDS 6th Orbit including measures of COU1569

-- 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 COU1569
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.109   354.42
--------------------------
1966.50    0.296    59.58
1967.50    0.292    60.19
1968.50    0.288    60.82
1969.50    0.283    61.47
1970.50    0.277    62.15
1971.50    0.271    62.86
1972.50    0.265    63.60
1973.50    0.258    64.37
1974.50    0.251    65.19
1975.50    0.243    66.06
1976.50    0.235    66.99
1977.50    0.226    67.99
1978.50    0.217    69.07
1979.50    0.207    70.26
1980.50    0.196    71.57
1981.50    0.185    73.04
1982.50    0.173    74.70
1983.50    0.160    76.62
1984.50    0.147    78.86
1985.50    0.134    81.55
1986.50    0.120    84.86
1987.50    0.105    89.06
1988.50    0.091    94.60
1989.50    0.077   102.19
1990.50    0.064   113.02
1991.50    0.054   128.64
1992.50    0.048   149.58
1993.50    0.049   172.43
1994.50    0.057   191.69
1995.50    0.068   205.62
1996.50    0.080   215.41
1997.50    0.093   222.56
1998.50    0.104   228.06
1999.50    0.114   232.52
2000.50    0.122   236.33
2001.50    0.128   239.70
2002.50    0.133   242.82
2003.50    0.135   245.77
2004.50    0.136   248.65
2005.50    0.136   251.52
2006.50    0.134   254.44
2007.50    0.132   257.45
2008.50    0.128   260.59
2009.50    0.124   263.92
2010.50    0.120   267.47
2011.50    0.116   271.29
2012.50    0.111   275.41
2013.50    0.107   279.87
2014.50    0.103   284.71
2015.50    0.099   289.93
2016.50    0.096   295.52
2017.50    0.093   301.47
2018.50    0.092   307.69
2019.50    0.091   314.09
2020.50    0.091   320.56
2021.50    0.092   326.95
2022.50    0.094   333.16
2023.50    0.096   339.06
2024.50    0.100   344.59
2025.50    0.104   349.72
2026.50    0.109   354.42
2027.50    0.114   358.71
2028.50    0.120     2.61
2029.50    0.126     6.15
2030.50    0.132     9.36
2031.50    0.138    12.27
2032.50    0.145    14.92
2033.50    0.151    17.35
2034.50    0.158    19.56
2035.50    0.165    21.60
2036.50    0.172    23.47
2037.50    0.178    25.21
2038.50    0.185    26.82
2039.50    0.192    28.31
2040.50    0.198    29.71
2041.50    0.205    31.02
2042.50    0.211    32.25
2043.50    0.217    33.41
2044.50    0.223    34.50
2045.50    0.229    35.54
2046.50    0.235    36.52
2047.50    0.241    37.46
2048.50    0.246    38.36
2049.50    0.252    39.21
2050.50    0.257    40.03
2051.50    0.262    40.82
2052.50    0.267    41.58
2053.50    0.271    42.32
2054.50    0.276    43.03
2055.50    0.280    43.71
2056.50    0.284    44.38
2057.50    0.288    45.03
2058.50    0.292    45.66
2059.50    0.295    46.28
2060.50    0.298    46.88
2061.50    0.301    47.47
2062.50    0.304    48.05
2063.50    0.306    48.63
2064.50    0.309    49.19
2065.50    0.311    49.74
2066.50    0.312    50.29
2067.50    0.314    50.83
2068.50    0.315    51.37
2069.50    0.316    51.90
2070.50    0.317    52.43
2071.50    0.317    52.96
2072.50    0.317    53.49
2073.50    0.317    54.02
2074.50    0.316    54.55
2075.50    0.315    55.08
2076.50    0.314    55.62
2077.50    0.313    56.16
2078.50    0.311    56.71
2079.50    0.309    57.26
2080.50    0.306    57.82
2081.50    0.303    58.39
2082.50    0.300    58.98






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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 16:24:04



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