Double Star Calculator - Orbit

Orbital Elements for COU1702
WDS: COU1702 WDS ID/Discoverer
P: 101.900 Orbital period (years)
a: 0.197 Semi-major axis (arcseconds)
i: 60.0 Inclination (degrees)
Ω: 100.0 Longitude of ascending node (degrees)
T: 1967.400 Epoch of periastron passage (year)
e: 0.55 Eccentricity
ω: 93.3 Longitude of periastron (degrees)
Start-Year: 1974.05 Year
End-Year: 2075.95 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU1702
Position: 040959.09+423505.0 Epoch-2000 right ascension and declination
WDS-ID: 04100+4235 WDS designation
Discoverer Code: COU1702 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 26139 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 8.9 Magnitude of the primary
V2: 8.9 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: Cou1999b Reference

Double Star Orbit for COU1702



WDS 6th Orbit including measures of COU1702

-- 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 COU1702
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.161    35.54
--------------------------
1974.05    0.121   275.02
1975.05    0.130   278.67
1976.05    0.138   281.86
1977.05    0.144   284.73
1978.05    0.150   287.37
1979.05    0.155   289.83
1980.05    0.159   292.15
1981.05    0.162   294.37
1982.05    0.165   296.50
1983.05    0.167   298.58
1984.05    0.169   300.61
1985.05    0.170   302.60
1986.05    0.171   304.58
1987.05    0.171   306.53
1988.05    0.172   308.48
1989.05    0.171   310.43
1990.05    0.171   312.38
1991.05    0.171   314.33
1992.05    0.170   316.30
1993.05    0.169   318.29
1994.05    0.168   320.30
1995.05    0.168   322.33
1996.05    0.166   324.38
1997.05    0.165   326.46
1998.05    0.164   328.57
1999.05    0.163   330.70
2000.05    0.162   332.87
2001.05    0.161   335.07
2002.05    0.160   337.30
2003.05    0.159   339.56
2004.05    0.158   341.85
2005.05    0.157   344.17
2006.05    0.156   346.52
2007.05    0.155   348.90
2008.05    0.154   351.29
2009.05    0.154   353.71
2010.05    0.153   356.15
2011.05    0.153   358.60
2012.05    0.152     1.06
2013.05    0.152     3.53
2014.05    0.152     6.01
2015.05    0.152     8.48
2016.05    0.152    10.95
2017.05    0.153    13.40
2018.05    0.153    15.85
2019.05    0.154    18.28
2020.05    0.155    20.68
2021.05    0.155    23.07
2022.05    0.156    25.43
2023.05    0.157    27.76
2024.05    0.158    30.05
2025.05    0.160    32.32
2026.05    0.161    34.55
2027.05    0.162    36.74
2028.05    0.164    38.90
2029.05    0.165    41.02
2030.05    0.167    43.10
2031.05    0.168    45.14
2032.05    0.170    47.15
2033.05    0.171    49.13
2034.05    0.173    51.06
2035.05    0.174    52.97
2036.05    0.176    54.84
2037.05    0.177    56.69
2038.05    0.178    58.50
2039.05    0.179    60.29
2040.05    0.181    62.06
2041.05    0.182    63.80
2042.05    0.183    65.53
2043.05    0.183    67.24
2044.05    0.184    68.94
2045.05    0.184    70.63
2046.05    0.184    72.31
2047.05    0.184    74.00
2048.05    0.184    75.69
2049.05    0.183    77.38
2050.05    0.182    79.10
2051.05    0.181    80.84
2052.05    0.179    82.60
2053.05    0.177    84.41
2054.05    0.174    86.27
2055.05    0.171    88.20
2056.05    0.167    90.21
2057.05    0.162    92.33
2058.05    0.156    94.59
2059.05    0.150    97.03
2060.05    0.143    99.70
2061.05    0.134   102.68
2062.05    0.125   106.09
2063.05    0.114   110.12
2064.05    0.102   115.05
2065.05    0.088   121.41
2066.05    0.074   130.12
2067.05    0.061   142.87
2068.05    0.049   162.31
2069.05    0.044   189.32
2070.05    0.048   216.81
2071.05    0.059   237.03
2072.05    0.073   250.35
2073.05    0.087   259.42
2074.05    0.100   266.04
2075.05    0.111   271.19






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 15:18:22



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