Double Star Calculator - Orbit

Orbital Elements for CHR18AA,AB

WDS:	CHR18AA,AB	WDS ID/Discoverer
P:	18.029	Orbital period (years)
a:	0.2401	Semi-major axis (arcseconds)
i:	69.923	Inclination (degrees)
Ω:	146.734	Longitude of ascending node (degrees)
T:	2010.177	Epoch of periastron passage (year)
e:	0.0715	Eccentricity
ω:	205.7	Longitude of periastron (degrees)
Start-Year:	2015.9854337450909	Year
End-Year:	2034.0145662549091	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR18AA,AB
Position:	043539.23+100939.3	Epoch-2000 right ascension and declination
WDS-ID:	04357+1010	WDS designation
Discoverer Code:	CHR18AA,AB	Discover designation and components
ADS number:	3317	Aitken Double Star catalog
HD number:	29140	HD catalog number
Hipparcos number:	21402	Hipparcos catalog number
V1:	4.44	Magnitude of the primary
V2:	6.61	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2007	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:	Lne2007	Reference

Double Star Orbit for CHR18AA,AB

WDS 6th Orbit including measures of CHR18AA,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 CHR18AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.221   322.09
--------------------------
2015.99    0.217   134.97
2016.09    0.221   135.79
2016.19    0.225   136.58
2016.29    0.228   137.35
2016.39    0.232   138.10
2016.49    0.235   138.82
2016.59    0.238   139.53
2016.69    0.240   140.22
2016.79    0.243   140.89
2016.89    0.245   141.55
2016.99    0.247   142.20
2017.09    0.249   142.84
2017.19    0.251   143.47
2017.29    0.252   144.10
2017.39    0.253   144.71
2017.49    0.254   145.33
2017.59    0.255   145.94
2017.69    0.255   146.54
2017.79    0.255   147.15
2017.89    0.255   147.75
2017.99    0.255   148.35
2018.09    0.255   148.96
2018.19    0.254   149.57
2018.29    0.253   150.18
2018.39    0.252   150.80
2018.49    0.251   151.42
2018.59    0.249   152.06
2018.69    0.247   152.70
2018.79    0.245   153.35
2018.89    0.243   154.01
2018.99    0.241   154.68
2019.09    0.238   155.37
2019.19    0.235   156.07
2019.29    0.232   156.80
2019.39    0.229   157.54
2019.49    0.225   158.30
2019.59    0.222   159.09
2019.69    0.218   159.90
2019.79    0.214   160.75
2019.89    0.210   161.62
2019.99    0.206   162.53
2020.09    0.201   163.48
2020.19    0.197   164.48
2020.29    0.192   165.52
2020.39    0.187   166.61
2020.49    0.183   167.76
2020.59    0.177   168.98
2020.69    0.172   170.27
2020.79    0.167   171.64
2020.89    0.162   173.09
2020.99    0.157   174.65
2021.09    0.151   176.31
2021.19    0.146   178.10
2021.29    0.140   180.03
2021.39    0.135   182.10
2021.49    0.130   184.35
2021.59    0.125   186.79
2021.69    0.119   189.44
2021.79    0.115   192.32
2021.89    0.110   195.45
2021.99    0.105   198.87
2022.09    0.101   202.57
2022.19    0.097   206.59
2022.29    0.094   210.92
2022.39    0.091   215.56
2022.49    0.088   220.49
2022.59    0.086   225.66
2022.69    0.085   231.02
2022.79    0.085   236.50
2022.89    0.085   242.00
2022.99    0.086   247.44
2023.09    0.087   252.74
2023.19    0.089   257.83
2023.29    0.092   262.65
2023.39    0.095   267.18
2023.49    0.099   271.40
2023.59    0.102   275.31
2023.69    0.107   278.91
2023.79    0.111   282.23
2023.89    0.116   285.28
2023.99    0.121   288.08
2024.09    0.126   290.67
2024.19    0.131   293.05
2024.29    0.136   295.25
2024.39    0.142   297.29
2024.49    0.147   299.19
2024.59    0.152   300.96
2024.69    0.157   302.61
2024.79    0.162   304.16
2024.89    0.167   305.62
2024.99    0.172   307.00
2025.09    0.176   308.30
2025.19    0.181   309.54
2025.29    0.185   310.71
2025.39    0.189   311.84
2025.49    0.193   312.91
2025.59    0.197   313.95
2025.69    0.201   314.95
2025.79    0.204   315.91
2025.89    0.207   316.84
2025.99    0.210   317.74
2026.09    0.213   318.63
2026.19    0.215   319.49
2026.29    0.217   320.33
2026.39    0.219   321.16
2026.49    0.221   321.97
2026.59    0.222   322.78
2026.69    0.223   323.57
2026.79    0.224   324.36
2026.89    0.224   325.15
2026.99    0.225   325.93
2027.09    0.224   326.71
2027.19    0.224   327.49
2027.29    0.223   328.28
2027.39    0.222   329.08
2027.49    0.221   329.88
2027.59    0.220   330.69
2027.69    0.218   331.51
2027.79    0.216   332.35
2027.89    0.213   333.21
2027.99    0.210   334.09
2028.09    0.208   334.99
2028.19    0.204   335.92
2028.29    0.201   336.88
2028.39    0.197   337.88
2028.49    0.193   338.91
2028.59    0.189   339.99
2028.69    0.185   341.12
2028.79    0.180   342.31
2028.89    0.175   343.56
2028.99    0.170   344.88
2029.09    0.165   346.28
2029.19    0.160   347.77
2029.29    0.154   349.37
2029.39    0.149   351.08
2029.49    0.143   352.93
2029.59    0.138   354.92
2029.69    0.132   357.09
2029.79    0.127   359.44
2029.89    0.121     2.02
2029.99    0.115     4.84
2030.09    0.110     7.94
2030.19    0.105    11.35
2030.29    0.100    15.11
2030.39    0.096    19.23
2030.49    0.091    23.75
2030.59    0.088    28.67
2030.69    0.085    33.99
2030.79    0.082    39.66
2030.89    0.081    45.62
2030.99    0.080    51.78
2031.09    0.080    58.01
2031.19    0.080    64.18
2031.29    0.082    70.18
2031.39    0.084    75.90
2031.49    0.087    81.26
2031.59    0.091    86.24
2031.69    0.095    90.81
2031.79    0.099    94.99
2031.89    0.104    98.79
2031.99    0.110   102.23
2032.09    0.115   105.36
2032.19    0.121   108.21
2032.29    0.126   110.80
2032.39    0.132   113.17
2032.49    0.138   115.33
2032.59    0.144   117.32
2032.69    0.149   119.16
2032.79    0.155   120.86
2032.89    0.161   122.44
2032.99    0.167   123.91
2033.09    0.172   125.28
2033.19    0.178   126.57
2033.29    0.183   127.78
2033.39    0.188   128.93
2033.49    0.193   130.01
2033.59    0.198   131.05
2033.69    0.203   132.03
2033.79    0.207   132.96
2033.89    0.212   133.86
2033.99    0.216   134.72

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 15:26:58