Double Star Calculator - Orbit

Orbital Elements for DUN116AB

WDS:	DUN116AB	WDS ID/Discoverer
P:	24000.000	Orbital period (years)
a:	30.0	Semi-major axis (arcseconds)
i:	110.0	Inclination (degrees)
Ω:	82.0	Longitude of ascending node (degrees)
T:	3600.000	Epoch of periastron passage (year)
e:	0.69	Eccentricity
ω:	100.0	Longitude of periastron (degrees)
Start-Year:	-9975.0	Year
End-Year:	14025.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DUN116AB
Position:	115642.30-321605.3	Epoch-2000 right ascension and declination
WDS-ID:	11567-3216	WDS designation
Discoverer Code:	DUN116AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	103742	HD catalog number
Hipparcos number:	58240	Hipparcos catalog number
V1:	7.67	Magnitude of the primary
V2:	7.83	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2016	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	LRR2021	Reference

Double Star Orbit for DUN116AB

WDS 6th Orbit including measures of DUN116AB

-- 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 DUN116AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50   18.586    83.03
--------------------------
-9975.00   17.435   160.55
-9875.00   17.524   159.45
-9775.00   17.617   158.37
-9675.00   17.713   157.30
-9575.00   17.813   156.24
-9475.00   17.916   155.19
-9375.00   18.023   154.16
-9275.00   18.133   153.14
-9175.00   18.245   152.13
-9075.00   18.361   151.13
-8975.00   18.480   150.14
-8875.00   18.602   149.17
-8775.00   18.726   148.21
-8675.00   18.852   147.26
-8575.00   18.982   146.33
-8475.00   19.113   145.41
-8375.00   19.246   144.50
-8275.00   19.382   143.60
-8175.00   19.519   142.72
-8075.00   19.659   141.85
-7975.00   19.800   140.99
-7875.00   19.942   140.15
-7775.00   20.086   139.31
-7675.00   20.231   138.49
-7575.00   20.378   137.68
-7475.00   20.526   136.88
-7375.00   20.674   136.09
-7275.00   20.824   135.32
-7175.00   20.974   134.55
-7075.00   21.125   133.80
-6975.00   21.276   133.05
-6875.00   21.428   132.32
-6775.00   21.580   131.60
-6675.00   21.732   130.88
-6575.00   21.885   130.18
-6475.00   22.037   129.49
-6375.00   22.189   128.80
-6275.00   22.341   128.13
-6175.00   22.493   127.47
-6075.00   22.644   126.81
-5975.00   22.795   126.16
-5875.00   22.945   125.52
-5775.00   23.094   124.89
-5675.00   23.243   124.27
-5575.00   23.390   123.65
-5475.00   23.536   123.05
-5375.00   23.681   122.45
-5275.00   23.825   121.86
-5175.00   23.968   121.27
-5075.00   24.108   120.69
-4975.00   24.248   120.12
-4875.00   24.385   119.56
-4775.00   24.521   119.00
-4675.00   24.655   118.44
-4575.00   24.786   117.90
-4475.00   24.916   117.36
-4375.00   25.043   116.82
-4275.00   25.167   116.29
-4175.00   25.290   115.76
-4075.00   25.409   115.24
-3975.00   25.526   114.73
-3875.00   25.640   114.22
-3775.00   25.751   113.71
-3675.00   25.858   113.21
-3575.00   25.963   112.71
-3475.00   26.064   112.22
-3375.00   26.161   111.73
-3275.00   26.255   111.24
-3175.00   26.345   110.76
-3075.00   26.430   110.28
-2975.00   26.512   109.80
-2875.00   26.590   109.33
-2775.00   26.662   108.86
-2675.00   26.731   108.39
-2575.00   26.794   107.92
-2475.00   26.853   107.46
-2375.00   26.906   106.99
-2275.00   26.954   106.53
-2175.00   26.997   106.07
-2075.00   27.033   105.62
-1975.00   27.064   105.16
-1875.00   27.088   104.70
-1775.00   27.106   104.25
-1675.00   27.118   103.79
-1575.00   27.122   103.34
-1475.00   27.120   102.89
-1375.00   27.109   102.43
-1275.00   27.091   101.98
-1175.00   27.065   101.52
-1075.00   27.031   101.06
-975.00   26.988   100.60
-875.00   26.935   100.15
-775.00   26.874    99.68
-675.00   26.802    99.22
-575.00   26.721    98.75
-475.00   26.628    98.28
-375.00   26.524    97.81
-275.00   26.409    97.33
-175.00   26.282    96.85
-75.00   26.141    96.37
25.00   25.988    95.87
125.00   25.820    95.38
225.00   25.637    94.87
325.00   25.440    94.36
425.00   25.225    93.84
525.00   24.994    93.31
625.00   24.745    92.77
725.00   24.476    92.22
825.00   24.188    91.65
925.00   23.878    91.07
1025.00   23.546    90.48
1125.00   23.190    89.87
1225.00   22.808    89.23
1325.00   22.399    88.58
1425.00   21.961    87.90
1525.00   21.492    87.19
1625.00   20.990    86.45
1725.00   20.452    85.67
1825.00   19.876    84.85
1925.00   19.258    83.98
2025.00   18.596    83.05
2125.00   17.886    82.04
2225.00   17.124    80.95
2325.00   16.306    79.76
2425.00   15.428    78.43
2525.00   14.484    76.93
2625.00   13.471    75.22
2725.00   12.383    73.22
2825.00   11.220    70.82
2925.00    9.979    67.84
3025.00    8.668    63.98
3125.00    7.302    58.70
3225.00    5.919    50.96
3325.00    4.607    38.65
3425.00    3.573    17.98
3525.00    3.204   347.47
3625.00    3.727   318.35
3725.00    4.829   299.52
3825.00    6.144   288.22
3925.00    7.486   280.96
4025.00    8.777   275.88
4125.00    9.979   272.07
4225.00   11.081   269.06
4325.00   12.080   266.56
4425.00   12.980   264.43
4525.00   13.788   262.57
4625.00   14.512   260.90
4725.00   15.159   259.38
4825.00   15.738   257.98
4925.00   16.254   256.68
5025.00   16.715   255.45
5125.00   17.125   254.28
5225.00   17.490   253.17
5325.00   17.814   252.09
5425.00   18.100   251.06
5525.00   18.354   250.05
5625.00   18.576   249.07
5725.00   18.771   248.11
5825.00   18.940   247.17
5925.00   19.086   246.25
6025.00   19.211   245.34
6125.00   19.316   244.44
6225.00   19.403   243.55
6325.00   19.474   242.66
6425.00   19.529   241.78
6525.00   19.571   240.91
6625.00   19.600   240.04
6725.00   19.617   239.17
6825.00   19.623   238.30
6925.00   19.619   237.43
7025.00   19.606   236.56
7125.00   19.584   235.69
7225.00   19.555   234.82
7325.00   19.518   233.94
7425.00   19.475   233.06
7525.00   19.425   232.18
7625.00   19.371   231.29
7725.00   19.311   230.40
7825.00   19.247   229.50
7925.00   19.179   228.60
8025.00   19.107   227.68
8125.00   19.032   226.76
8225.00   18.954   225.84
8325.00   18.874   224.90
8425.00   18.792   223.96
8525.00   18.707   223.01
8625.00   18.622   222.05
8725.00   18.535   221.08
8825.00   18.447   220.11
8925.00   18.359   219.12
9025.00   18.271   218.12
9125.00   18.183   217.12
9225.00   18.095   216.10
9325.00   18.007   215.08
9425.00   17.920   214.04
9525.00   17.834   212.99
9625.00   17.750   211.94
9725.00   17.667   210.87
9825.00   17.585   209.80
9925.00   17.506   208.71
10025.00   17.428   207.62
10125.00   17.353   206.51
10225.00   17.280   205.40
10325.00   17.210   204.27
10425.00   17.142   203.14
10525.00   17.078   202.00
10625.00   17.017   200.85
10725.00   16.959   199.69
10825.00   16.904   198.52
10925.00   16.854   197.35
11025.00   16.806   196.17
11125.00   16.763   194.98
11225.00   16.724   193.79
11325.00   16.688   192.59
11425.00   16.657   191.39
11525.00   16.630   190.19
11625.00   16.607   188.98
11725.00   16.589   187.76
11825.00   16.575   186.55
11925.00   16.566   185.33
12025.00   16.562   184.11
12125.00   16.562   182.89
12225.00   16.566   181.67
12325.00   16.576   180.46
12425.00   16.590   179.24
12525.00   16.608   178.03
12625.00   16.632   176.82
12725.00   16.660   175.61
12825.00   16.693   174.41
12925.00   16.730   173.21
13025.00   16.772   172.02
13125.00   16.819   170.84
13225.00   16.870   169.66
13325.00   16.926   168.49
13425.00   16.986   167.33
13525.00   17.050   166.17
13625.00   17.119   165.03
13725.00   17.192   163.89
13825.00   17.269   162.77
13925.00   17.350   161.65

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 16:42:47