Double Star Calculator - Orbit

Orbital Elements for CHR71

WDS:	CHR71	WDS ID/Discoverer
P:	19.827	Orbital period (years)
a:	0.069	Semi-major axis (arcseconds)
i:	138.9	Inclination (degrees)
Ω:	125.7	Longitude of ascending node (degrees)
T:	2018.705	Epoch of periastron passage (year)
e:	0.224	Eccentricity
ω:	34.8	Longitude of periastron (degrees)
Start-Year:	2015.0865	Year
End-Year:	2034.9135	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR71
Position:	182758.77+061139.0	Epoch-2000 right ascension and declination
WDS-ID:	18280+0612	WDS designation
Discoverer Code:	CHR71	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	170200	HD catalog number
Hipparcos number:	90497	Hipparcos catalog number
V1:	6.5	Magnitude of the primary
V2:	6.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	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:	Doc2019d	Reference

Double Star Orbit for CHR71

WDS 6th Orbit including measures of CHR71

-- 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 CHR71

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.082   298.66
--------------------------
2015.09    0.055   174.34
2015.19    0.055   172.25
2015.29    0.055   170.18
2015.39    0.055   168.11
2015.49    0.056   166.05
2015.59    0.056   164.00
2015.69    0.056   161.96
2015.79    0.056   159.93
2015.89    0.056   157.91
2015.99    0.056   155.90
2016.09    0.056   153.89
2016.19    0.056   151.89
2016.29    0.056   149.90
2016.39    0.057   147.91
2016.49    0.057   145.93
2016.59    0.057   143.95
2016.69    0.057   141.96
2016.79    0.057   139.98
2016.89    0.056   137.99
2016.99    0.056   136.00
2017.09    0.056   133.99
2017.19    0.056   131.98
2017.29    0.056   129.95
2017.39    0.056   127.91
2017.49    0.055   125.85
2017.59    0.055   123.77
2017.69    0.055   121.66
2017.79    0.054   119.53
2017.89    0.054   117.37
2017.99    0.054   115.17
2018.09    0.053   112.93
2018.19    0.053   110.66
2018.29    0.052   108.34
2018.39    0.051   105.97
2018.49    0.051   103.54
2018.59    0.050   101.07
2018.69    0.050    98.53
2018.79    0.049    95.94
2018.89    0.049    93.27
2018.99    0.048    90.55
2019.09    0.047    87.75
2019.19    0.047    84.88
2019.29    0.046    81.94
2019.39    0.046    78.94
2019.49    0.045    75.86
2019.59    0.045    72.72
2019.69    0.044    69.52
2019.79    0.044    66.26
2019.89    0.044    62.96
2019.99    0.043    59.61
2020.09    0.043    56.23
2020.19    0.043    52.83
2020.29    0.043    49.42
2020.39    0.043    46.01
2020.49    0.043    42.62
2020.59    0.043    39.25
2020.69    0.044    35.91
2020.79    0.044    32.62
2020.89    0.045    29.39
2020.99    0.045    26.22
2021.09    0.046    23.12
2021.19    0.046    20.10
2021.29    0.047    17.16
2021.39    0.048    14.31
2021.49    0.048    11.54
2021.59    0.049     8.86
2021.69    0.050     6.27
2021.79    0.051     3.76
2021.89    0.052     1.34
2021.99    0.053   359.00
2022.09    0.054   356.75
2022.19    0.054   354.57
2022.29    0.055   352.46
2022.39    0.056   350.43
2022.49    0.057   348.47
2022.59    0.058   346.57
2022.69    0.059   344.74
2022.79    0.060   342.96
2022.89    0.061   341.24
2022.99    0.062   339.58
2023.09    0.063   337.96
2023.19    0.064   336.39
2023.29    0.065   334.86
2023.39    0.066   333.38
2023.49    0.067   331.94
2023.59    0.068   330.53
2023.69    0.068   329.16
2023.79    0.069   327.82
2023.89    0.070   326.51
2023.99    0.071   325.23
2024.09    0.072   323.98
2024.19    0.072   322.76
2024.29    0.073   321.55
2024.39    0.074   320.37
2024.49    0.074   319.22
2024.59    0.075   318.08
2024.69    0.076   316.96
2024.79    0.076   315.85
2024.89    0.077   314.77
2024.99    0.077   313.70
2025.09    0.078   312.64
2025.19    0.078   311.59
2025.29    0.079   310.56
2025.39    0.079   309.54
2025.49    0.079   308.52
2025.59    0.080   307.52
2025.69    0.080   306.53
2025.79    0.080   305.54
2025.89    0.081   304.56
2025.99    0.081   303.59
2026.09    0.081   302.62
2026.19    0.081   301.66
2026.29    0.081   300.70
2026.39    0.082   299.74
2026.49    0.082   298.79
2026.59    0.082   297.84
2026.69    0.082   296.89
2026.79    0.082   295.94
2026.89    0.082   294.99
2026.99    0.082   294.04
2027.09    0.082   293.09
2027.19    0.082   292.14
2027.29    0.082   291.19
2027.39    0.081   290.24
2027.49    0.081   289.28
2027.59    0.081   288.32
2027.69    0.081   287.35
2027.79    0.081   286.38
2027.89    0.081   285.41
2027.99    0.080   284.43
2028.09    0.080   283.44
2028.19    0.080   282.45
2028.29    0.079   281.44
2028.39    0.079   280.43
2028.49    0.079   279.42
2028.59    0.078   278.39
2028.69    0.078   277.35
2028.79    0.078   276.30
2028.89    0.077   275.24
2028.99    0.077   274.17
2029.09    0.076   273.09
2029.19    0.076   271.99
2029.29    0.075   270.88
2029.39    0.075   269.76
2029.49    0.074   268.62
2029.59    0.074   267.46
2029.69    0.073   266.29
2029.79    0.073   265.10
2029.89    0.072   263.90
2029.99    0.072   262.68
2030.09    0.071   261.43
2030.19    0.071   260.17
2030.29    0.070   258.89
2030.39    0.069   257.58
2030.49    0.069   256.26
2030.59    0.068   254.91
2030.69    0.068   253.53
2030.79    0.067   252.14
2030.89    0.067   250.72
2030.99    0.066   249.27
2031.09    0.065   247.80
2031.19    0.065   246.31
2031.29    0.064   244.78
2031.39    0.064   243.23
2031.49    0.063   241.65
2031.59    0.063   240.05
2031.69    0.062   238.41
2031.79    0.062   236.75
2031.89    0.061   235.06
2031.99    0.061   233.34
2032.09    0.060   231.59
2032.19    0.060   229.81
2032.29    0.059   228.01
2032.39    0.059   226.18
2032.49    0.058   224.32
2032.59    0.058   222.44
2032.69    0.057   220.53
2032.79    0.057   218.59
2032.89    0.057   216.63
2032.99    0.056   214.65
2033.09    0.056   212.65
2033.19    0.056   210.63
2033.29    0.056   208.59
2033.39    0.055   206.54
2033.49    0.055   204.46
2033.59    0.055   202.38
2033.69    0.055   200.29
2033.79    0.055   198.18
2033.89    0.055   196.07
2033.99    0.055   193.95
2034.09    0.055   191.83
2034.19    0.055   189.71
2034.29    0.055   187.58
2034.39    0.055   185.46
2034.49    0.055   183.34
2034.59    0.055   181.22
2034.69    0.055   179.11
2034.79    0.055   177.00
2034.89    0.055   174.91

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 17:51:59