Double Star Calculator - Orbit

Orbital Elements for COU1289

WDS:	COU1289	WDS ID/Discoverer
P:	16.090	Orbital period (years)
a:	0.075	Semi-major axis (arcseconds)
i:	113.0	Inclination (degrees)
Ω:	63.2	Longitude of ascending node (degrees)
T:	2001.070	Epoch of periastron passage (year)
e:	0.753	Eccentricity
ω:	154.3	Longitude of periastron (degrees)
Start-Year:	2016.955	Year
End-Year:	2033.045	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU1289
Position:	165822.85+394236.8	Epoch-2000 right ascension and declination
WDS-ID:	16584+3943	WDS designation
Discoverer Code:	COU1289	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	153527	HD catalog number
Hipparcos number:	83064	Hipparcos catalog number
V1:	8.4	Magnitude of the primary
V2:	8.4	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Doc2013e	Reference

Double Star Orbit for COU1289

WDS 6th Orbit including measures of COU1289

-- 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 COU1289

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.123    71.04
--------------------------
2016.95    0.010   291.47
2017.05    0.014   268.46
2017.15    0.017   254.42
2017.25    0.019   244.48
2017.35    0.020   236.17
2017.45    0.020   228.26
2017.55    0.020   220.09
2017.65    0.019   211.29
2017.75    0.018   201.67
2017.85    0.017   191.28
2017.95    0.017   180.41
2018.05    0.017   169.58
2018.15    0.018   159.32
2018.25    0.019   150.05
2018.35    0.021   141.94
2018.45    0.022   134.99
2018.55    0.024   129.08
2018.65    0.026   124.06
2018.75    0.029   119.78
2018.85    0.031   116.12
2018.95    0.033   112.94
2019.05    0.035   110.18
2019.15    0.038   107.75
2019.25    0.040   105.61
2019.35    0.042   103.69
2019.45    0.044   101.97
2019.55    0.047   100.41
2019.65    0.049    99.00
2019.75    0.051    97.70
2019.85    0.053    96.52
2019.95    0.055    95.42
2020.05    0.058    94.41
2020.15    0.060    93.46
2020.25    0.062    92.58
2020.35    0.064    91.76
2020.45    0.066    90.98
2020.55    0.067    90.25
2020.65    0.069    89.56
2020.75    0.071    88.90
2020.85    0.073    88.28
2020.95    0.075    87.69
2021.05    0.077    87.13
2021.15    0.078    86.59
2021.25    0.080    86.07
2021.35    0.082    85.57
2021.45    0.083    85.10
2021.55    0.085    84.64
2021.65    0.086    84.20
2021.75    0.088    83.77
2021.85    0.089    83.36
2021.95    0.091    82.96
2022.05    0.092    82.58
2022.15    0.094    82.20
2022.25    0.095    81.84
2022.35    0.096    81.49
2022.45    0.098    81.14
2022.55    0.099    80.81
2022.65    0.100    80.48
2022.75    0.101    80.16
2022.85    0.102    79.85
2022.95    0.104    79.55
2023.05    0.105    79.25
2023.15    0.106    78.95
2023.25    0.107    78.67
2023.35    0.108    78.39
2023.45    0.109    78.11
2023.55    0.110    77.84
2023.65    0.111    77.57
2023.75    0.111    77.31
2023.85    0.112    77.05
2023.95    0.113    76.80
2024.05    0.114    76.54
2024.15    0.115    76.30
2024.25    0.115    76.05
2024.35    0.116    75.81
2024.45    0.117    75.57
2024.55    0.117    75.33
2024.65    0.118    75.10
2024.75    0.118    74.87
2024.85    0.119    74.64
2024.95    0.119    74.41
2025.05    0.120    74.19
2025.15    0.120    73.96
2025.25    0.121    73.74
2025.35    0.121    73.52
2025.45    0.121    73.30
2025.55    0.122    73.08
2025.65    0.122    72.86
2025.75    0.122    72.64
2025.85    0.122    72.43
2025.95    0.123    72.21
2026.05    0.123    72.00
2026.15    0.123    71.78
2026.25    0.123    71.57
2026.35    0.123    71.35
2026.45    0.123    71.14
2026.55    0.123    70.93
2026.65    0.123    70.71
2026.75    0.123    70.50
2026.85    0.123    70.28
2026.95    0.122    70.07
2027.05    0.122    69.85
2027.15    0.122    69.63
2027.25    0.122    69.41
2027.35    0.121    69.19
2027.45    0.121    68.97
2027.55    0.121    68.75
2027.65    0.120    68.53
2027.75    0.120    68.30
2027.85    0.119    68.08
2027.95    0.118    67.85
2028.05    0.118    67.61
2028.15    0.117    67.38
2028.25    0.117    67.14
2028.35    0.116    66.90
2028.45    0.115    66.66
2028.55    0.114    66.41
2028.65    0.113    66.16
2028.75    0.112    65.91
2028.85    0.111    65.65
2028.95    0.110    65.39
2029.05    0.109    65.12
2029.15    0.108    64.85
2029.25    0.107    64.57
2029.35    0.106    64.28
2029.45    0.105    63.99
2029.55    0.103    63.69
2029.65    0.102    63.38
2029.75    0.100    63.07
2029.85    0.099    62.74
2029.95    0.097    62.40
2030.05    0.096    62.06
2030.15    0.094    61.70
2030.25    0.092    61.32
2030.35    0.090    60.94
2030.45    0.088    60.53
2030.55    0.086    60.11
2030.65    0.084    59.66
2030.75    0.082    59.20
2030.85    0.080    58.71
2030.95    0.078    58.19
2031.05    0.075    57.63
2031.15    0.073    57.04
2031.25    0.070    56.41
2031.35    0.067    55.72
2031.45    0.065    54.98
2031.55    0.062    54.16
2031.65    0.058    53.27
2031.75    0.055    52.27
2031.85    0.052    51.14
2031.95    0.048    49.85
2032.05    0.045    48.35
2032.15    0.041    46.59
2032.25    0.037    44.44
2032.35    0.033    41.76
2032.45    0.028    38.26
2032.55    0.024    33.47
2032.65    0.019    26.42
2032.75    0.015    15.05
2032.85    0.011   355.08
2032.95    0.009   322.40

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 17:32:40