Double Star Calculator - Orbit

Orbital Elements for A264AB
WDS: A264AB WDS ID/Discoverer
P: 1281.320 Orbital period (years)
a: 7.04727 Semi-major axis (arcseconds)
i: 90.691 Inclination (degrees)
Ω: 107.961 Longitude of ascending node (degrees)
T: 2123.763 Epoch of periastron passage (year)
e: 0.80383 Eccentricity
ω: 260.975 Longitude of periastron (degrees)
Start-Year: 1384.3402 Year
End-Year: 2665.6598 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A264AB
Position: 191242.44+243436.3 Epoch-2000 right ascension and declination
WDS-ID: 19127+2435 WDS designation
Discoverer Code: A264AB Discover designation and components
ADS number: 12166 Aitken Double Star catalog
HD number: 179736 HD catalog number
Hipparcos number: 94387 Hipparcos catalog number
V1: 8.20 Magnitude of the primary
V2: 11.90 Magnitude of the secondary
Equinox: Equinox
Date: 2008 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: Izm2019 Reference

Double Star Orbit for A264AB



WDS 6th Orbit including measures of A264AB

-- 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 A264AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    3.385   288.76
--------------------------
1384.34    3.062   105.22
1394.34    2.959   105.11
1404.34    2.855   104.99
1414.34    2.750   104.87
1424.34    2.644   104.73
1434.34    2.537   104.58
1444.34    2.428   104.42
1454.34    2.319   104.24
1464.34    2.209   104.04
1474.34    2.098   103.83
1484.34    1.986   103.59
1494.34    1.873   103.32
1504.34    1.760   103.02
1514.34    1.646   102.67
1524.34    1.531   102.27
1534.34    1.416   101.81
1544.34    1.300   101.27
1554.34    1.184   100.62
1564.34    1.068    99.82
1574.34    0.951    98.84
1584.34    0.834    97.58
1594.34    0.718    95.91
1604.34    0.602    93.59
1614.34    0.487    90.17
1624.34    0.375    84.68
1634.34    0.269    74.70
1644.34    0.180    53.59
1654.34    0.147    12.23
1664.34    0.198   335.12
1674.34    0.292   317.49
1684.34    0.400   308.88
1694.34    0.513   304.00
1704.34    0.628   300.89
1714.34    0.744   298.74
1724.34    0.860   297.18
1734.34    0.977   295.99
1744.34    1.093   295.05
1754.34    1.208   294.29
1764.34    1.324   293.67
1774.34    1.438   293.14
1784.34    1.552   292.69
1794.34    1.664   292.30
1804.34    1.776   291.96
1814.34    1.886   291.67
1824.34    1.995   291.40
1834.34    2.102   291.16
1844.34    2.207   290.95
1854.34    2.311   290.75
1864.34    2.412   290.57
1874.34    2.511   290.40
1884.34    2.607   290.25
1894.34    2.701   290.11
1904.34    2.791   289.98
1914.34    2.877   289.85
1924.34    2.959   289.73
1934.34    3.037   289.62
1944.34    3.109   289.52
1954.34    3.176   289.42
1964.34    3.236   289.32
1974.34    3.288   289.22
1984.34    3.332   289.13
1994.34    3.366   289.04
2004.34    3.388   288.96
2014.34    3.397   288.87
2024.34    3.389   288.78
2034.34    3.362   288.69
2044.34    3.311   288.60
2054.34    3.229   288.51
2064.34    3.109   288.41
2074.34    2.936   288.30
2084.34    2.692   288.18
2094.34    2.346   288.02
2104.34    1.846   287.79
2114.34    1.122   287.32
2124.34    0.158   281.94
2134.34    0.856   109.02
2144.34    1.702   108.35
2154.34    2.359   108.10
2164.34    2.873   107.96
2174.34    3.284   107.85
2184.34    3.619   107.77
2194.34    3.896   107.70
2204.34    4.128   107.63
2214.34    4.323   107.58
2224.34    4.488   107.53
2234.34    4.628   107.48
2244.34    4.745   107.43
2254.34    4.845   107.39
2264.34    4.927   107.35
2274.34    4.995   107.31
2284.34    5.051   107.27
2294.34    5.095   107.23
2304.34    5.128   107.19
2314.34    5.152   107.15
2324.34    5.167   107.11
2334.34    5.174   107.08
2344.34    5.174   107.04
2354.34    5.167   107.00
2364.34    5.153   106.96
2374.34    5.134   106.93
2384.34    5.109   106.89
2394.34    5.080   106.85
2404.34    5.045   106.81
2414.34    5.006   106.77
2424.34    4.963   106.73
2434.34    4.916   106.69
2444.34    4.865   106.65
2454.34    4.810   106.60
2464.34    4.752   106.56
2474.34    4.690   106.52
2484.34    4.626   106.47
2494.34    4.559   106.42
2504.34    4.489   106.37
2514.34    4.416   106.32
2524.34    4.341   106.27
2534.34    4.263   106.22
2544.34    4.183   106.16
2554.34    4.101   106.10
2564.34    4.017   106.04
2574.34    3.930   105.98
2584.34    3.842   105.91
2594.34    3.752   105.84
2604.34    3.660   105.77
2614.34    3.566   105.69
2624.34    3.471   105.61
2634.34    3.374   105.53
2644.34    3.276   105.44
2654.34    3.176   105.34
2664.34    3.075   105.24






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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 18:01:54



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