Double Star Calculator - Orbit

Orbital Elements for DUN55AB
WDS: DUN55AB WDS ID/Discoverer
P: 230000.000 Orbital period (years)
a: 160.0 Semi-major axis (arcseconds)
i: 95.0 Inclination (degrees)
Ω: 110.0 Longitude of ascending node (degrees)
T: 2108.027 Epoch of periastron passage (year)
e: 0.41 Eccentricity
ω: 83.0 Longitude of periastron (degrees)
Start-Year: -112975.0 Year
End-Year: 117025.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for DUN55AB
Position: 074412.62-502725.5 Epoch-2000 right ascension and declination
WDS-ID: 07442-5027 WDS designation
Discoverer Code: DUN55AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 63008 HD catalog number
Hipparcos number: 37718 Hipparcos catalog number
V1: 6.64 Magnitude of the primary
V2: 7.59 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 DUN55AB



WDS 6th Orbit including measures of DUN55AB

-- 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 DUN55AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50   14.554    75.90
--------------------------
-112975.00   33.905   254.86
-111975.00   31.666   251.90
-110975.00   29.516   248.49
-109975.00   27.480   244.56
-108975.00   25.585   240.02
-107975.00   23.869   234.80
-106975.00   22.374   228.82
-105975.00   21.149   222.08
-104975.00   20.245   214.62
-103975.00   19.707   206.61
-102975.00   19.565   198.32
-101975.00   19.829   190.08
-100975.00   20.482   182.21
-99975.00   21.488   174.95
-98975.00   22.799   168.44
-97975.00   24.365   162.69
-96975.00   26.139   157.69
-95975.00   28.079   153.34
-94975.00   30.152   149.58
-93975.00   32.329   146.31
-92975.00   34.589   143.46
-91975.00   36.914   140.96
-90975.00   39.290   138.77
-89975.00   41.706   136.82
-88975.00   44.153   135.09
-87975.00   46.622   133.55
-86975.00   49.109   132.16
-85975.00   51.607   130.90
-84975.00   54.112   129.76
-83975.00   56.620   128.72
-82975.00   59.128   127.77
-81975.00   61.633   126.89
-80975.00   64.131   126.09
-79975.00   66.621   125.34
-78975.00   69.100   124.65
-77975.00   71.566   124.01
-76975.00   74.017   123.40
-75975.00   76.451   122.84
-74975.00   78.867   122.31
-73975.00   81.262   121.82
-72975.00   83.634   121.35
-71975.00   85.982   120.90
-70975.00   88.305   120.48
-69975.00   90.600   120.09
-68975.00   92.867   119.71
-67975.00   95.102   119.35
-66975.00   97.305   119.00
-65975.00   99.474   118.67
-64975.00   101.607   118.36
-63975.00   103.702   118.06
-62975.00   105.758   117.77
-61975.00   107.773   117.49
-60975.00   109.744   117.22
-59975.00   111.671   116.96
-58975.00   113.550   116.71
-57975.00   115.381   116.46
-56975.00   117.160   116.23
-55975.00   118.886   116.00
-54975.00   120.557   115.78
-53975.00   122.170   115.56
-52975.00   123.724   115.35
-51975.00   125.215   115.14
-50975.00   126.641   114.94
-49975.00   127.999   114.75
-48975.00   129.288   114.55
-47975.00   130.504   114.37
-46975.00   131.644   114.18
-45975.00   132.705   114.00
-44975.00   133.685   113.82
-43975.00   134.580   113.64
-42975.00   135.387   113.47
-41975.00   136.102   113.29
-40975.00   136.722   113.12
-39975.00   137.243   112.95
-38975.00   137.661   112.78
-37975.00   137.973   112.62
-36975.00   138.174   112.45
-35975.00   138.260   112.28
-34975.00   138.227   112.12
-33975.00   138.069   111.95
-32975.00   137.783   111.78
-31975.00   137.364   111.61
-30975.00   136.806   111.44
-29975.00   136.104   111.27
-28975.00   135.253   111.10
-27975.00   134.248   110.92
-26975.00   133.083   110.75
-25975.00   131.752   110.56
-24975.00   130.249   110.38
-23975.00   128.570   110.19
-22975.00   126.707   109.99
-21975.00   124.655   109.79
-20975.00   122.409   109.58
-19975.00   119.962   109.37
-18975.00   117.310   109.14
-17975.00   114.448   108.90
-16975.00   111.369   108.65
-15975.00   108.071   108.39
-14975.00   104.550   108.11
-13975.00   100.803   107.80
-12975.00   96.827   107.48
-11975.00   92.623   107.12
-10975.00   88.189   106.73
-9975.00   83.530   106.30
-8975.00   78.647   105.82
-7975.00   73.547   105.27
-6975.00   68.237   104.63
-5975.00   62.728   103.89
-4975.00   57.034   103.00
-3975.00   51.169   101.91
-2975.00   45.157   100.53
-1975.00   39.024    98.72
-975.00   32.808    96.24
25.00   26.566    92.58
1025.00   20.403    86.70
2025.00   14.562    75.92
3025.00    9.802    53.01
4025.00    8.367    10.37
5025.00   11.586   335.40
6025.00   16.966   318.98
7025.00   22.993   310.79
8025.00   29.214   306.04
9025.00   35.467   302.97
10025.00   41.675   300.82
11025.00   47.795   299.22
12025.00   53.795   297.98
13025.00   59.656   296.99
14025.00   65.361   296.17
15025.00   70.897   295.48
16025.00   76.255   294.90
17025.00   81.427   294.38
18025.00   86.408   293.93
19025.00   91.194   293.53
20025.00   95.783   293.16
21025.00   100.174   292.83
22025.00   104.367   292.52
23025.00   108.362   292.24
24025.00   112.162   291.98
25025.00   115.769   291.74
26025.00   119.186   291.51
27025.00   122.415   291.29
28025.00   125.460   291.08
29025.00   128.326   290.88
30025.00   131.016   290.69
31025.00   133.534   290.51
32025.00   135.885   290.33
33025.00   138.072   290.16
34025.00   140.101   290.00
35025.00   141.974   289.84
36025.00   143.698   289.68
37025.00   145.275   289.53
38025.00   146.711   289.38
39025.00   148.008   289.24
40025.00   149.172   289.09
41025.00   150.206   288.95
42025.00   151.114   288.81
43025.00   151.899   288.67
44025.00   152.565   288.53
45025.00   153.117   288.40
46025.00   153.556   288.26
47025.00   153.887   288.13
48025.00   154.113   287.99
49025.00   154.237   287.86
50025.00   154.261   287.72
51025.00   154.190   287.59
52025.00   154.025   287.46
53025.00   153.769   287.32
54025.00   153.426   287.19
55025.00   152.998   287.05
56025.00   152.486   286.91
57025.00   151.894   286.78
58025.00   151.225   286.64
59025.00   150.479   286.50
60025.00   149.660   286.36
61025.00   148.770   286.21
62025.00   147.810   286.07
63025.00   146.784   285.92
64025.00   145.691   285.77
65025.00   144.536   285.62
66025.00   143.319   285.47
67025.00   142.042   285.31
68025.00   140.707   285.15
69025.00   139.315   284.99
70025.00   137.869   284.82
71025.00   136.370   284.65
72025.00   134.819   284.48
73025.00   133.219   284.30
74025.00   131.570   284.12
75025.00   129.873   283.94
76025.00   128.132   283.74
77025.00   126.346   283.55
78025.00   124.517   283.35
79025.00   122.646   283.14
80025.00   120.736   282.92
81025.00   118.786   282.70
82025.00   116.799   282.47
83025.00   114.775   282.23
84025.00   112.717   281.99
85025.00   110.624   281.73
86025.00   108.498   281.47
87025.00   106.341   281.19
88025.00   104.154   280.90
89025.00   101.937   280.60
90025.00   99.692   280.29
91025.00   97.420   279.96
92025.00   95.123   279.62
93025.00   92.801   279.26
94025.00   90.455   278.88
95025.00   88.088   278.48
96025.00   85.699   278.05
97025.00   83.291   277.61
98025.00   80.865   277.14
99025.00   78.421   276.63
100025.00   75.962   276.10
101025.00   73.489   275.53
102025.00   71.003   274.92
103025.00   68.506   274.26
104025.00   66.000   273.56
105025.00   63.487   272.80
106025.00   60.968   271.98
107025.00   58.447   271.08
108025.00   55.925   270.11
109025.00   53.406   269.04
110025.00   50.893   267.87
111025.00   48.389   266.57
112025.00   45.900   265.14
113025.00   43.431   263.54
114025.00   40.988   261.75
115025.00   38.579   259.74
116025.00   36.214   257.46






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 16:00:41



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