Double Star Calculator - Orbit

Orbital Elements for CHR67AA,AB

WDS:	CHR67AA,AB	WDS ID/Discoverer
P:	16.579	Orbital period (years)
a:	0.177	Semi-major axis (arcseconds)
i:	37.3	Inclination (degrees)
Ω:	33.3	Longitude of ascending node (degrees)
T:	1986.411	Epoch of periastron passage (year)
e:	0.933	Eccentricity
ω:	107.2	Longitude of periastron (degrees)
Start-Year:	2016.7105	Year
End-Year:	2033.2895	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR67AA,AB
Position:	180749.56+260604.4	Epoch-2000 right ascension and declination
WDS-ID:	18078+2606	WDS designation
Discoverer Code:	CHR67AA,AB	Discover designation and components
ADS number:	11089	Aitken Double Star catalog
HD number:	166045	HD catalog number
Hipparcos number:	88818	Hipparcos catalog number
V1:	5.9	Magnitude of the primary
V2:	8.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2019	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2021c	Reference

Double Star Orbit for CHR67AA,AB

WDS 6th Orbit including measures of CHR67AA,AB

-- 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 CHR67AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.272   321.10
--------------------------
2016.71    0.204   341.00
2016.81    0.201   341.48
2016.91    0.197   341.97
2017.01    0.193   342.48
2017.11    0.190   343.02
2017.21    0.186   343.57
2017.31    0.182   344.14
2017.41    0.178   344.75
2017.51    0.173   345.38
2017.61    0.169   346.05
2017.71    0.164   346.75
2017.81    0.159   347.49
2017.91    0.154   348.28
2018.01    0.149   349.13
2018.11    0.144   350.03
2018.21    0.138   351.01
2018.31    0.132   352.07
2018.41    0.126   353.24
2018.51    0.120   354.52
2018.61    0.113   355.96
2018.71    0.106   357.58
2018.81    0.098   359.45
2018.91    0.090     1.64
2019.01    0.081     4.28
2019.11    0.072     7.60
2019.21    0.061    12.00
2019.31    0.049    18.39
2019.41    0.035    29.46
2019.51    0.017    60.56
2019.61    0.015   202.75
2019.71    0.030   242.95
2019.81    0.042   257.97
2019.91    0.052   266.73
2020.01    0.062   272.73
2020.11    0.070   277.22
2020.21    0.078   280.77
2020.31    0.086   283.68
2020.41    0.093   286.14
2020.51    0.099   288.26
2020.61    0.106   290.12
2020.71    0.112   291.77
2020.81    0.118   293.25
2020.91    0.123   294.59
2021.01    0.129   295.82
2021.11    0.134   296.95
2021.21    0.139   298.00
2021.31    0.144   298.97
2021.41    0.149   299.88
2021.51    0.153   300.74
2021.61    0.158   301.55
2021.71    0.162   302.31
2021.81    0.166   303.03
2021.91    0.170   303.72
2022.01    0.174   304.38
2022.11    0.178   305.01
2022.21    0.182   305.61
2022.31    0.185   306.19
2022.41    0.189   306.74
2022.51    0.192   307.28
2022.61    0.196   307.79
2022.71    0.199   308.29
2022.81    0.202   308.78
2022.91    0.205   309.25
2023.01    0.208   309.70
2023.11    0.211   310.14
2023.21    0.214   310.57
2023.31    0.217   310.99
2023.41    0.220   311.40
2023.51    0.222   311.80
2023.61    0.225   312.19
2023.71    0.227   312.57
2023.81    0.230   312.95
2023.91    0.232   313.31
2024.01    0.234   313.67
2024.11    0.237   314.02
2024.21    0.239   314.37
2024.31    0.241   314.70
2024.41    0.243   315.04
2024.51    0.245   315.36
2024.61    0.247   315.69
2024.71    0.249   316.00
2024.81    0.250   316.32
2024.91    0.252   316.63
2025.01    0.254   316.93
2025.11    0.255   317.23
2025.21    0.257   317.53
2025.31    0.258   317.82
2025.41    0.260   318.11
2025.51    0.261   318.40
2025.61    0.263   318.68
2025.71    0.264   318.96
2025.81    0.265   319.24
2025.91    0.266   319.52
2026.01    0.267   319.79
2026.11    0.269   320.06
2026.21    0.270   320.33
2026.31    0.270   320.60
2026.41    0.271   320.86
2026.51    0.272   321.13
2026.61    0.273   321.39
2026.71    0.274   321.65
2026.81    0.275   321.91
2026.91    0.275   322.17
2027.01    0.276   322.42
2027.11    0.276   322.68
2027.21    0.277   322.93
2027.31    0.277   323.19
2027.41    0.278   323.44
2027.51    0.278   323.69
2027.61    0.278   323.94
2027.71    0.279   324.19
2027.81    0.279   324.44
2027.91    0.279   324.69
2028.01    0.279   324.94
2028.11    0.279   325.19
2028.21    0.279   325.44
2028.31    0.279   325.69
2028.41    0.279   325.94
2028.51    0.279   326.19
2028.61    0.279   326.44
2028.71    0.279   326.69
2028.81    0.278   326.95
2028.91    0.278   327.20
2029.01    0.277   327.45
2029.11    0.277   327.70
2029.21    0.277   327.96
2029.31    0.276   328.21
2029.41    0.275   328.47
2029.51    0.275   328.73
2029.61    0.274   328.99
2029.71    0.273   329.25
2029.81    0.272   329.51
2029.91    0.271   329.77
2030.01    0.271   330.04
2030.11    0.270   330.30
2030.21    0.269   330.57
2030.31    0.267   330.84
2030.41    0.266   331.12
2030.51    0.265   331.39
2030.61    0.264   331.67
2030.71    0.262   331.95
2030.81    0.261   332.24
2030.91    0.260   332.52
2031.01    0.258   332.81
2031.11    0.256   333.11
2031.21    0.255   333.41
2031.31    0.253   333.71
2031.41    0.251   334.01
2031.51    0.250   334.33
2031.61    0.248   334.64
2031.71    0.246   334.96
2031.81    0.244   335.29
2031.91    0.241   335.62
2032.01    0.239   335.95
2032.11    0.237   336.30
2032.21    0.235   336.65
2032.31    0.232   337.01
2032.41    0.230   337.37
2032.51    0.227   337.74
2032.61    0.224   338.13
2032.71    0.222   338.52
2032.81    0.219   338.92
2032.91    0.216   339.33
2033.01    0.213   339.75
2033.11    0.210   340.19
2033.21    0.207   340.64

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 17:48:01