Double Star Calculator - Orbit

Orbital Elements for COU2118
WDS: COU2118 WDS ID/Discoverer
P: 25.200 Orbital period (years)
a: 0.143 Semi-major axis (arcseconds)
i: 37.5 Inclination (degrees)
Ω: 150.0 Longitude of ascending node (degrees)
T: 1994.610 Epoch of periastron passage (year)
e: 0.55 Eccentricity
ω: 73.0 Longitude of periastron (degrees)
Start-Year: 2012.4 Year
End-Year: 2037.6 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for COU2118
Position: 181205.16+464411.9 Epoch-2000 right ascension and declination
WDS-ID: 18121+4644 WDS designation
Discoverer Code: COU2118 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 167260 HD catalog number
Hipparcos number: 89186 Hipparcos catalog number
V1: 11.07 Magnitude of the primary
V2: 8.71 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: Cou1999b Reference

Double Star Orbit for COU2118



WDS 6th Orbit including measures of COU2118

-- 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 COU2118
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.170     3.55
--------------------------
2012.40    0.155    74.02
2012.50    0.155    74.83
2012.60    0.154    75.65
2012.70    0.153    76.47
2012.80    0.152    77.30
2012.90    0.152    78.13
2013.00    0.151    78.98
2013.10    0.150    79.83
2013.20    0.149    80.70
2013.30    0.149    81.57
2013.40    0.148    82.45
2013.50    0.147    83.34
2013.60    0.146    84.24
2013.70    0.145    85.15
2013.80    0.145    86.07
2013.90    0.144    87.00
2014.00    0.143    87.94
2014.10    0.142    88.89
2014.20    0.141    89.86
2014.30    0.140    90.84
2014.40    0.139    91.82
2014.50    0.139    92.83
2014.60    0.138    93.84
2014.70    0.137    94.87
2014.80    0.136    95.91
2014.90    0.135    96.97
2015.00    0.134    98.04
2015.10    0.133    99.13
2015.20    0.132   100.24
2015.30    0.131   101.36
2015.40    0.130   102.50
2015.50    0.129   103.66
2015.60    0.128   104.84
2015.70    0.126   106.04
2015.80    0.125   107.26
2015.90    0.124   108.50
2016.00    0.123   109.77
2016.10    0.122   111.06
2016.20    0.121   112.38
2016.30    0.119   113.72
2016.40    0.118   115.10
2016.50    0.117   116.50
2016.60    0.115   117.94
2016.70    0.114   119.41
2016.80    0.113   120.91
2016.90    0.111   122.46
2017.00    0.110   124.04
2017.10    0.108   125.68
2017.20    0.107   127.36
2017.30    0.105   129.09
2017.40    0.103   130.87
2017.50    0.102   132.72
2017.60    0.100   134.63
2017.70    0.098   136.61
2017.80    0.096   138.67
2017.90    0.094   140.81
2018.00    0.092   143.04
2018.10    0.090   145.38
2018.20    0.088   147.83
2018.30    0.086   150.41
2018.40    0.083   153.12
2018.50    0.081   155.99
2018.60    0.079   159.04
2018.70    0.076   162.28
2018.80    0.074   165.74
2018.90    0.071   169.44
2019.00    0.068   173.42
2019.10    0.066   177.71
2019.20    0.063   182.34
2019.30    0.061   187.33
2019.40    0.059   192.72
2019.50    0.057   198.52
2019.60    0.055   204.72
2019.70    0.054   211.31
2019.80    0.052   218.22
2019.90    0.052   225.37
2020.00    0.052   232.63
2020.10    0.052   239.89
2020.20    0.053   246.99
2020.30    0.054   253.83
2020.40    0.055   260.32
2020.50    0.057   266.40
2020.60    0.060   272.04
2020.70    0.062   277.25
2020.80    0.065   282.04
2020.90    0.068   286.43
2021.00    0.071   290.47
2021.10    0.074   294.19
2021.20    0.077   297.62
2021.30    0.080   300.78
2021.40    0.083   303.72
2021.50    0.086   306.44
2021.60    0.089   308.99
2021.70    0.092   311.37
2021.80    0.094   313.61
2021.90    0.097   315.72
2022.00    0.100   317.71
2022.10    0.103   319.59
2022.20    0.105   321.38
2022.30    0.108   323.08
2022.40    0.110   324.71
2022.50    0.113   326.26
2022.60    0.115   327.75
2022.70    0.118   329.18
2022.80    0.120   330.56
2022.90    0.122   331.88
2023.00    0.124   333.16
2023.10    0.126   334.40
2023.20    0.128   335.59
2023.30    0.130   336.75
2023.40    0.132   337.88
2023.50    0.134   338.97
2023.60    0.136   340.04
2023.70    0.137   341.08
2023.80    0.139   342.09
2023.90    0.141   343.08
2024.00    0.142   344.04
2024.10    0.144   344.98
2024.20    0.146   345.91
2024.30    0.147   346.81
2024.40    0.148   347.70
2024.50    0.150   348.57
2024.60    0.151   349.43
2024.70    0.152   350.27
2024.80    0.154   351.09
2024.90    0.155   351.90
2025.00    0.156   352.70
2025.10    0.157   353.49
2025.20    0.158   354.27
2025.30    0.160   355.03
2025.40    0.161   355.79
2025.50    0.162   356.54
2025.60    0.163   357.27
2025.70    0.164   358.00
2025.80    0.165   358.72
2025.90    0.165   359.43
2026.00    0.166     0.13
2026.10    0.167     0.83
2026.20    0.168     1.52
2026.30    0.169     2.20
2026.40    0.170     2.88
2026.50    0.170     3.55
2026.60    0.171     4.21
2026.70    0.172     4.87
2026.80    0.172     5.53
2026.90    0.173     6.18
2027.00    0.174     6.82
2027.10    0.174     7.46
2027.20    0.175     8.10
2027.30    0.175     8.73
2027.40    0.176     9.36
2027.50    0.176     9.98
2027.60    0.177    10.60
2027.70    0.177    11.22
2027.80    0.178    11.83
2027.90    0.178    12.45
2028.00    0.178    13.06
2028.10    0.179    13.66
2028.20    0.179    14.27
2028.30    0.180    14.87
2028.40    0.180    15.47
2028.50    0.180    16.06
2028.60    0.180    16.66
2028.70    0.181    17.25
2028.80    0.181    17.84
2028.90    0.181    18.43
2029.00    0.181    19.02
2029.10    0.182    19.61
2029.20    0.182    20.19
2029.30    0.182    20.78
2029.40    0.182    21.36
2029.50    0.182    21.95
2029.60    0.182    22.53
2029.70    0.182    23.11
2029.80    0.183    23.69
2029.90    0.183    24.27
2030.00    0.183    24.85
2030.10    0.183    25.43
2030.20    0.183    26.01
2030.30    0.183    26.59
2030.40    0.183    27.17
2030.50    0.183    27.75
2030.60    0.183    28.33
2030.70    0.183    28.91
2030.80    0.183    29.49
2030.90    0.183    30.07
2031.00    0.183    30.65
2031.10    0.182    31.23
2031.20    0.182    31.81
2031.30    0.182    32.39
2031.40    0.182    32.98
2031.50    0.182    33.56
2031.60    0.182    34.14
2031.70    0.182    34.73
2031.80    0.182    35.32
2031.90    0.181    35.91
2032.00    0.181    36.49
2032.10    0.181    37.08
2032.20    0.181    37.68
2032.30    0.180    38.27
2032.40    0.180    38.87
2032.50    0.180    39.46
2032.60    0.180    40.06
2032.70    0.179    40.66
2032.80    0.179    41.26
2032.90    0.179    41.87
2033.00    0.179    42.47
2033.10    0.178    43.08
2033.20    0.178    43.69
2033.30    0.178    44.30
2033.40    0.177    44.92
2033.50    0.177    45.53
2033.60    0.177    46.15
2033.70    0.176    46.78
2033.80    0.176    47.40
2033.90    0.175    48.03
2034.00    0.175    48.66
2034.10    0.175    49.29
2034.20    0.174    49.93
2034.30    0.174    50.57
2034.40    0.173    51.21
2034.50    0.173    51.85
2034.60    0.173    52.50
2034.70    0.172    53.15
2034.80    0.172    53.81
2034.90    0.171    54.47
2035.00    0.171    55.13
2035.10    0.170    55.80
2035.20    0.170    56.47
2035.30    0.169    57.14
2035.40    0.169    57.82
2035.50    0.168    58.51
2035.60    0.168    59.19
2035.70    0.167    59.88
2035.80    0.166    60.58
2035.90    0.166    61.28
2036.00    0.165    61.99
2036.10    0.165    62.70
2036.20    0.164    63.41
2036.30    0.164    64.13
2036.40    0.163    64.86
2036.50    0.162    65.59
2036.60    0.162    66.33
2036.70    0.161    67.07
2036.80    0.161    67.82
2036.90    0.160    68.57
2037.00    0.159    69.33
2037.10    0.159    70.10
2037.20    0.158    70.87
2037.30    0.157    71.65
2037.40    0.157    72.43
2037.50    0.156    73.23






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 17:49:06



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