Double Star Calculator - Orbit

Orbital Elements for MCA68AB

WDS:	MCA68AB	WDS ID/Discoverer
P:	25.500	Orbital period (years)
a:	0.28	Semi-major axis (arcseconds)
i:	95.0	Inclination (degrees)
Ω:	300.0	Longitude of ascending node (degrees)
T:	1970.400	Epoch of periastron passage (year)
e:	0.6	Eccentricity
ω:	270.0	Longitude of periastron (degrees)
Start-Year:	2012.25	Year
End-Year:	2037.75	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MCA68AB
Position:	213745.10-075115.1	Epoch-2000 right ascension and declination
WDS-ID:	21378-0751	WDS designation
Discoverer Code:	MCA68AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	205767	HD catalog number
Hipparcos number:	106786	Hipparcos catalog number
V1:	4.8	Magnitude of the primary
V2:	7.0	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	9	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Gon2002b	Reference

Double Star Orbit for MCA68AB

WDS 6th Orbit including measures of MCA68AB

-- 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 MCA68AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.217   294.44
--------------------------
2012.25    0.125   136.36
2012.35    0.128   135.88
2012.45    0.131   135.42
2012.55    0.134   134.98
2012.65    0.137   134.56
2012.75    0.139   134.15
2012.85    0.142   133.76
2012.95    0.145   133.39
2013.05    0.148   133.03
2013.15    0.151   132.68
2013.25    0.153   132.35
2013.35    0.156   132.03
2013.45    0.159   131.72
2013.55    0.161   131.41
2013.65    0.164   131.12
2013.75    0.167   130.84
2013.85    0.169   130.57
2013.95    0.172   130.30
2014.05    0.174   130.04
2014.15    0.177   129.79
2014.25    0.179   129.55
2014.35    0.181   129.31
2014.45    0.184   129.08
2014.55    0.186   128.85
2014.65    0.188   128.63
2014.75    0.190   128.41
2014.85    0.193   128.20
2014.95    0.195   128.00
2015.05    0.197   127.80
2015.15    0.199   127.60
2015.25    0.201   127.40
2015.35    0.203   127.21
2015.45    0.204   127.03
2015.55    0.206   126.85
2015.65    0.208   126.67
2015.75    0.209   126.49
2015.85    0.211   126.31
2015.95    0.213   126.14
2016.05    0.214   125.97
2016.15    0.215   125.80
2016.25    0.217   125.64
2016.35    0.218   125.47
2016.45    0.219   125.31
2016.55    0.220   125.15
2016.65    0.221   124.99
2016.75    0.222   124.84
2016.85    0.222   124.68
2016.95    0.223   124.52
2017.05    0.224   124.37
2017.15    0.224   124.22
2017.25    0.224   124.06
2017.35    0.224   123.91
2017.45    0.224   123.76
2017.55    0.224   123.60
2017.65    0.224   123.45
2017.75    0.224   123.29
2017.85    0.223   123.14
2017.95    0.223   122.99
2018.05    0.222   122.83
2018.15    0.221   122.67
2018.25    0.219   122.51
2018.35    0.218   122.35
2018.45    0.216   122.19
2018.55    0.214   122.02
2018.65    0.212   121.85
2018.75    0.210   121.68
2018.85    0.208   121.50
2018.95    0.205   121.32
2019.05    0.202   121.13
2019.15    0.198   120.94
2019.25    0.194   120.74
2019.35    0.190   120.53
2019.45    0.186   120.31
2019.55    0.181   120.08
2019.65    0.176   119.84
2019.75    0.170   119.58
2019.85    0.164   119.31
2019.95    0.157   119.01
2020.05    0.150   118.68
2020.15    0.143   118.32
2020.25    0.134   117.92
2020.35    0.126   117.46
2020.45    0.116   116.93
2020.55    0.106   116.31
2020.65    0.096   115.56
2020.75    0.085   114.61
2020.85    0.073   113.36
2020.95    0.061   111.63
2021.05    0.048   109.00
2021.15    0.035   104.50
2021.25    0.023    94.91
2021.35    0.012    65.27
2021.45    0.012   354.73
2021.55    0.023   325.09
2021.65    0.035   315.50
2021.75    0.048   311.00
2021.85    0.061   308.37
2021.95    0.073   306.64
2022.05    0.085   305.39
2022.15    0.096   304.44
2022.25    0.106   303.69
2022.35    0.116   303.07
2022.45    0.126   302.54
2022.55    0.134   302.08
2022.65    0.143   301.68
2022.75    0.150   301.32
2022.85    0.157   300.99
2022.95    0.164   300.69
2023.05    0.170   300.42
2023.15    0.176   300.16
2023.25    0.181   299.92
2023.35    0.186   299.69
2023.45    0.190   299.47
2023.55    0.194   299.26
2023.65    0.198   299.06
2023.75    0.202   298.87
2023.85    0.205   298.68
2023.95    0.208   298.50
2024.05    0.210   298.32
2024.15    0.212   298.15
2024.25    0.214   297.98
2024.35    0.216   297.81
2024.45    0.218   297.65
2024.55    0.219   297.49
2024.65    0.221   297.33
2024.75    0.222   297.17
2024.85    0.223   297.01
2024.95    0.223   296.86
2025.05    0.224   296.71
2025.15    0.224   296.55
2025.25    0.224   296.40
2025.35    0.224   296.24
2025.45    0.224   296.09
2025.55    0.224   295.94
2025.65    0.224   295.78
2025.75    0.224   295.63
2025.85    0.223   295.48
2025.95    0.222   295.32
2026.05    0.222   295.16
2026.15    0.221   295.01
2026.25    0.220   294.85
2026.35    0.219   294.69
2026.45    0.218   294.53
2026.55    0.217   294.36
2026.65    0.215   294.20
2026.75    0.214   294.03
2026.85    0.213   293.86
2026.95    0.211   293.69
2027.05    0.209   293.51
2027.15    0.208   293.33
2027.25    0.206   293.15
2027.35    0.204   292.97
2027.45    0.203   292.79
2027.55    0.201   292.60
2027.65    0.199   292.40
2027.75    0.197   292.20
2027.85    0.195   292.00
2027.95    0.193   291.80
2028.05    0.190   291.59
2028.15    0.188   291.37
2028.25    0.186   291.15
2028.35    0.184   290.92
2028.45    0.181   290.69
2028.55    0.179   290.45
2028.65    0.177   290.21
2028.75    0.174   289.96
2028.85    0.172   289.70
2028.95    0.169   289.43
2029.05    0.167   289.16
2029.15    0.164   288.88
2029.25    0.161   288.59
2029.35    0.159   288.28
2029.45    0.156   287.97
2029.55    0.153   287.65
2029.65    0.151   287.32
2029.75    0.148   286.97
2029.85    0.145   286.61
2029.95    0.142   286.24
2030.05    0.139   285.85
2030.15    0.137   285.44
2030.25    0.134   285.02
2030.35    0.131   284.58
2030.45    0.128   284.12
2030.55    0.125   283.64
2030.65    0.122   283.13
2030.75    0.119   282.60
2030.85    0.116   282.04
2030.95    0.113   281.46
2031.05    0.110   280.84
2031.15    0.107   280.19
2031.25    0.105   279.51
2031.35    0.102   278.78
2031.45    0.099   278.01
2031.55    0.096   277.19
2031.65    0.093   276.32
2031.75    0.090   275.39
2031.85    0.087   274.40
2031.95    0.084   273.34
2032.05    0.081   272.20
2032.15    0.078   270.98
2032.25    0.075   269.67
2032.35    0.072   268.26
2032.45    0.070   266.73
2032.55    0.067   265.07
2032.65    0.064   263.27
2032.75    0.062   261.32
2032.85    0.059   259.19
2032.95    0.057   256.88
2033.05    0.054   254.35
2033.15    0.052   251.60
2033.25    0.050   248.60
2033.35    0.048   245.34
2033.45    0.046   241.80
2033.55    0.044   237.97
2033.65    0.043   233.86
2033.75    0.041   229.48
2033.85    0.040   224.85
2033.95    0.040   220.02
2034.05    0.039   215.05
2034.15    0.039   210.00
2034.25    0.039   204.95
2034.35    0.040   199.98
2034.45    0.040   195.15
2034.55    0.041   190.52
2034.65    0.043   186.14
2034.75    0.044   182.03
2034.85    0.046   178.20
2034.95    0.048   174.66
2035.05    0.050   171.40
2035.15    0.052   168.40
2035.25    0.054   165.65
2035.35    0.057   163.12
2035.45    0.059   160.81
2035.55    0.062   158.68
2035.65    0.064   156.73
2035.75    0.067   154.93
2035.85    0.070   153.27
2035.95    0.072   151.74
2036.05    0.075   150.33
2036.15    0.078   149.02
2036.25    0.081   147.80
2036.35    0.084   146.66
2036.45    0.087   145.60
2036.55    0.090   144.61
2036.65    0.093   143.68
2036.75    0.096   142.81
2036.85    0.099   141.99
2036.95    0.102   141.22
2037.05    0.105   140.49
2037.15    0.107   139.81
2037.25    0.110   139.16
2037.35    0.113   138.54
2037.45    0.116   137.96
2037.55    0.119   137.40
2037.65    0.122   136.87

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 18:27:48