Double Star Calculator - Orbit

Orbital Elements for BU113AB
WDS: BU113AB WDS ID/Discoverer
P: 1056.400 Orbital period (years)
a: 2.639 Semi-major axis (arcseconds)
i: 51.5 Inclination (degrees)
Ω: 276.8 Longitude of ascending node (degrees)
T: 2043.900 Epoch of periastron passage (year)
e: 0.352 Eccentricity
ω: 9.1 Longitude of periastron (degrees)
Start-Year: 1496.8 Year
End-Year: 2553.2 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU113AB
Position: 132906.11+112810.1 Epoch-2000 right ascension and declination
WDS-ID: 13291+1128 WDS designation
Discoverer Code: BU113AB Discover designation and components
ADS number: 8917 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 65780 Hipparcos catalog number
V1: 8.73 Magnitude of the primary
V2: 10.66 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Hrt2013a Reference

Double Star Orbit for BU113AB



WDS 6th Orbit including measures of BU113AB

-- 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 BU113AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.719   274.27
--------------------------
1496.80    3.554   100.42
1506.80    3.548   101.51
1516.80    3.539   102.62
1526.80    3.527   103.72
1536.80    3.510   104.84
1546.80    3.490   105.97
1556.80    3.466   107.11
1566.80    3.439   108.27
1576.80    3.408   109.45
1586.80    3.373   110.65
1596.80    3.335   111.88
1606.80    3.293   113.14
1616.80    3.248   114.44
1626.80    3.200   115.77
1636.80    3.149   117.14
1646.80    3.094   118.56
1656.80    3.036   120.03
1666.80    2.975   121.56
1676.80    2.912   123.16
1686.80    2.845   124.82
1696.80    2.776   126.58
1706.80    2.705   128.42
1716.80    2.631   130.36
1726.80    2.556   132.42
1736.80    2.478   134.60
1746.80    2.399   136.92
1756.80    2.319   139.41
1766.80    2.239   142.07
1776.80    2.158   144.93
1786.80    2.078   148.02
1796.80    1.998   151.35
1806.80    1.921   154.95
1816.80    1.846   158.85
1826.80    1.774   163.08
1836.80    1.708   167.64
1846.80    1.646   172.56
1856.80    1.592   177.84
1866.80    1.546   183.47
1876.80    1.509   189.40
1886.80    1.482   195.58
1896.80    1.466   201.95
1906.80    1.460   208.42
1916.80    1.465   214.89
1926.80    1.479   221.28
1936.80    1.501   227.51
1946.80    1.529   233.54
1956.80    1.562   239.33
1966.80    1.596   244.88
1976.80    1.630   250.19
1986.80    1.661   255.30
1996.80    1.688   260.23
2006.80    1.707   265.02
2016.80    1.718   269.73
2026.80    1.719   274.41
2036.80    1.710   279.11
2046.80    1.690   283.89
2056.80    1.661   288.81
2066.80    1.623   293.94
2076.80    1.578   299.34
2086.80    1.529   305.07
2096.80    1.478   311.19
2106.80    1.430   317.73
2116.80    1.387   324.71
2126.80    1.352   332.09
2136.80    1.329   339.80
2146.80    1.320   347.69
2156.80    1.326   355.60
2166.80    1.348     3.35
2176.80    1.385    10.77
2186.80    1.436    17.73
2196.80    1.498    24.17
2206.80    1.570    30.06
2216.80    1.650    35.40
2226.80    1.735    40.23
2236.80    1.825    44.60
2246.80    1.917    48.56
2256.80    2.010    52.15
2266.80    2.104    55.41
2276.80    2.198    58.40
2286.80    2.291    61.15
2296.80    2.381    63.69
2306.80    2.470    66.04
2316.80    2.556    68.23
2326.80    2.640    70.27
2336.80    2.720    72.20
2346.80    2.798    74.02
2356.80    2.872    75.74
2366.80    2.942    77.37
2376.80    3.009    78.94
2386.80    3.072    80.43
2396.80    3.131    81.87
2406.80    3.187    83.25
2416.80    3.238    84.59
2426.80    3.286    85.89
2436.80    3.330    87.16
2446.80    3.370    88.39
2456.80    3.406    89.59
2466.80    3.438    90.77
2476.80    3.467    91.93
2486.80    3.491    93.08
2496.80    3.511    94.20
2506.80    3.528    95.32
2516.80    3.540    96.43
2526.80    3.549    97.53
2536.80    3.554    98.62
2546.80    3.555    99.72






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 16:56:43



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