Double Star Calculator - Orbit

Orbital Elements for MLR4

WDS:	MLR4	WDS ID/Discoverer
P:	20.750	Orbital period (years)
a:	0.1472	Semi-major axis (arcseconds)
i:	52.53	Inclination (degrees)
Ω:	108.02	Longitude of ascending node (degrees)
T:	1989.287	Epoch of periastron passage (year)
e:	0.2915	Eccentricity
ω:	291.2	Longitude of periastron (degrees)
Start-Year:	2014.625	Year
End-Year:	2035.375	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MLR4
Position:	234105.55+461306.0	Epoch-2000 right ascension and declination
WDS-ID:	23411+4613	WDS designation
Discoverer Code:	MLR4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	222516	HD catalog number
Hipparcos number:	116849	Hipparcos catalog number
V1:	7.67	Magnitude of the primary
V2:	8.03	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		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:	Hrt1996a	Reference

Double Star Orbit for MLR4

WDS 6th Orbit including measures of MLR4

-- 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 MLR4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.148   289.98
--------------------------
2014.62    0.127   138.44
2014.72    0.126   139.81
2014.82    0.126   141.19
2014.92    0.125   142.59
2015.02    0.124   143.99
2015.12    0.124   145.41
2015.22    0.123   146.85
2015.32    0.122   148.30
2015.42    0.122   149.77
2015.52    0.121   151.25
2015.62    0.120   152.75
2015.72    0.120   154.26
2015.82    0.119   155.80
2015.92    0.118   157.35
2016.02    0.118   158.91
2016.12    0.117   160.50
2016.22    0.117   162.10
2016.32    0.116   163.71
2016.42    0.116   165.34
2016.52    0.115   166.99
2016.62    0.114   168.65
2016.72    0.114   170.33
2016.82    0.114   172.02
2016.92    0.113   173.72
2017.02    0.113   175.43
2017.12    0.113   177.16
2017.22    0.112   178.89
2017.32    0.112   180.63
2017.42    0.112   182.37
2017.52    0.112   184.12
2017.62    0.112   185.87
2017.72    0.112   187.63
2017.82    0.112   189.38
2017.92    0.112   191.14
2018.02    0.112   192.89
2018.12    0.112   194.63
2018.22    0.112   196.37
2018.32    0.113   198.11
2018.42    0.113   199.83
2018.52    0.113   201.54
2018.62    0.114   203.24
2018.72    0.114   204.93
2018.82    0.115   206.60
2018.92    0.115   208.25
2019.02    0.116   209.89
2019.12    0.116   211.51
2019.22    0.117   213.12
2019.32    0.118   214.70
2019.42    0.119   216.26
2019.52    0.119   217.81
2019.62    0.120   219.33
2019.72    0.121   220.83
2019.82    0.122   222.31
2019.92    0.123   223.76
2020.02    0.124   225.20
2020.12    0.125   226.61
2020.22    0.126   228.00
2020.32    0.127   229.37
2020.42    0.128   230.71
2020.52    0.129   232.04
2020.62    0.130   233.34
2020.72    0.131   234.62
2020.82    0.132   235.88
2020.92    0.133   237.12
2021.02    0.134   238.34
2021.12    0.136   239.54
2021.22    0.137   240.72
2021.32    0.138   241.89
2021.42    0.139   243.03
2021.52    0.140   244.15
2021.62    0.141   245.26
2021.72    0.142   246.36
2021.82    0.143   247.43
2021.92    0.144   248.49
2022.02    0.145   249.54
2022.12    0.146   250.57
2022.22    0.147   251.58
2022.32    0.148   252.58
2022.42    0.149   253.57
2022.52    0.150   254.55
2022.62    0.151   255.52
2022.72    0.152   256.47
2022.82    0.153   257.42
2022.92    0.153   258.35
2023.02    0.154   259.27
2023.12    0.155   260.19
2023.22    0.156   261.10
2023.32    0.156   261.99
2023.42    0.157   262.89
2023.52    0.158   263.77
2023.62    0.158   264.65
2023.72    0.159   265.52
2023.82    0.159   266.39
2023.92    0.159   267.25
2024.02    0.160   268.11
2024.12    0.160   268.97
2024.22    0.160   269.82
2024.32    0.161   270.67
2024.42    0.161   271.52
2024.52    0.161   272.36
2024.62    0.161   273.21
2024.72    0.161   274.06
2024.82    0.161   274.91
2024.92    0.160   275.76
2025.02    0.160   276.61
2025.12    0.160   277.46
2025.22    0.159   278.32
2025.32    0.159   279.18
2025.42    0.158   280.05
2025.52    0.158   280.92
2025.62    0.157   281.81
2025.72    0.156   282.70
2025.82    0.156   283.59
2025.92    0.155   284.50
2026.02    0.154   285.42
2026.12    0.153   286.35
2026.22    0.151   287.30
2026.32    0.150   288.26
2026.42    0.149   289.24
2026.52    0.147   290.23
2026.62    0.146   291.25
2026.72    0.144   292.29
2026.82    0.143   293.35
2026.92    0.141   294.44
2027.02    0.139   295.55
2027.12    0.137   296.70
2027.22    0.135   297.88
2027.32    0.133   299.10
2027.42    0.131   300.36
2027.52    0.128   301.66
2027.62    0.126   303.02
2027.72    0.123   304.42
2027.82    0.121   305.89
2027.92    0.118   307.42
2028.02    0.116   309.02
2028.12    0.113   310.70
2028.22    0.110   312.46
2028.32    0.107   314.32
2028.42    0.104   316.28
2028.52    0.101   318.36
2028.62    0.098   320.57
2028.72    0.095   322.91
2028.82    0.092   325.41
2028.92    0.089   328.08
2029.02    0.086   330.94
2029.12    0.083   333.99
2029.22    0.080   337.26
2029.32    0.078   340.77
2029.42    0.075   344.51
2029.52    0.073   348.51
2029.62    0.071   352.77
2029.72    0.069   357.27
2029.82    0.067     2.00
2029.92    0.066     6.95
2030.02    0.065    12.05
2030.12    0.064    17.28
2030.22    0.064    22.56
2030.32    0.065    27.83
2030.42    0.065    33.04
2030.52    0.066    38.12
2030.62    0.067    43.03
2030.72    0.069    47.74
2030.82    0.071    52.21
2030.92    0.073    56.44
2031.02    0.075    60.43
2031.12    0.078    64.17
2031.22    0.080    67.68
2031.32    0.083    70.97
2031.42    0.086    74.05
2031.52    0.088    76.95
2031.62    0.091    79.68
2031.72    0.094    82.25
2031.82    0.096    84.67
2031.92    0.099    86.97
2032.02    0.101    89.16
2032.12    0.104    91.24
2032.22    0.106    93.23
2032.32    0.108    95.13
2032.42    0.110    96.96
2032.52    0.112    98.73
2032.62    0.114   100.43
2032.72    0.116   102.08
2032.82    0.118   103.68
2032.92    0.119   105.23
2033.02    0.121   106.75
2033.12    0.122   108.24
2033.22    0.123   109.69
2033.32    0.124   111.12
2033.42    0.125   112.52
2033.52    0.126   113.91
2033.62    0.127   115.27
2033.72    0.128   116.63
2033.82    0.128   117.97
2033.92    0.129   119.29
2034.02    0.129   120.62
2034.12    0.129   121.93
2034.22    0.129   123.24
2034.32    0.129   124.55
2034.42    0.129   125.85
2034.52    0.129   127.16
2034.62    0.129   128.46
2034.72    0.129   129.77
2034.82    0.129   131.09
2034.92    0.129   132.41
2035.02    0.128   133.73
2035.12    0.128   135.07
2035.22    0.127   136.41
2035.32    0.127   137.76

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 18:53:57