Double Star Calculator - Orbit

Orbital Elements for A651
WDS: A651 WDS ID/Discoverer
P: 1530.000 Orbital period (years)
a: 1.96 Semi-major axis (arcseconds)
i: 121.3 Inclination (degrees)
Ω: 179.3 Longitude of ascending node (degrees)
T: 1907.000 Epoch of periastron passage (year)
e: 0.633 Eccentricity
ω: 319.5 Longitude of periastron (degrees)
Start-Year: 1260.0 Year
End-Year: 2790.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A651
Position: 004322.78+472618.8 Epoch-2000 right ascension and declination
WDS-ID: 00434+4726 WDS designation
Discoverer Code: A651 Discover designation and components
ADS number: 601 Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.67 Magnitude of the primary
V2: 10.20 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2000 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: USN2002 Reference

Double Star Orbit for A651



WDS 6th Orbit including measures of A651

-- 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 A651
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.893   137.40
--------------------------
1260.00    2.798    17.51
1270.00    2.803    17.05
1280.00    2.808    16.59
1290.00    2.812    16.13
1300.00    2.814    15.67
1310.00    2.816    15.21
1320.00    2.817    14.75
1330.00    2.816    14.29
1340.00    2.815    13.83
1350.00    2.812    13.37
1360.00    2.808    12.91
1370.00    2.804    12.45
1380.00    2.798    11.99
1390.00    2.791    11.52
1400.00    2.782    11.05
1410.00    2.773    10.58
1420.00    2.762    10.11
1430.00    2.750     9.63
1440.00    2.737     9.15
1450.00    2.722     8.66
1460.00    2.706     8.17
1470.00    2.689     7.67
1480.00    2.670     7.16
1490.00    2.650     6.65
1500.00    2.628     6.12
1510.00    2.605     5.59
1520.00    2.580     5.05
1530.00    2.554     4.50
1540.00    2.526     3.94
1550.00    2.496     3.36
1560.00    2.465     2.77
1570.00    2.431     2.16
1580.00    2.396     1.54
1590.00    2.359     0.90
1600.00    2.320     0.23
1610.00    2.280   359.55
1620.00    2.236   358.83
1630.00    2.191   358.09
1640.00    2.144   357.32
1650.00    2.094   356.51
1660.00    2.042   355.66
1670.00    1.987   354.76
1680.00    1.929   353.81
1690.00    1.869   352.80
1700.00    1.806   351.73
1710.00    1.740   350.57
1720.00    1.671   349.32
1730.00    1.599   347.96
1740.00    1.524   346.47
1750.00    1.445   344.82
1760.00    1.362   342.97
1770.00    1.276   340.88
1780.00    1.187   338.49
1790.00    1.094   335.69
1800.00    0.999   332.36
1810.00    0.900   328.32
1820.00    0.801   323.28
1830.00    0.701   316.80
1840.00    0.607   308.24
1850.00    0.522   296.70
1860.00    0.458   281.34
1870.00    0.426   262.41
1880.00    0.435   242.47
1890.00    0.480   224.90
1900.00    0.547   211.00
1910.00    0.620   200.29
1920.00    0.690   191.81
1930.00    0.749   184.80
1940.00    0.797   178.73
1950.00    0.833   173.27
1960.00    0.858   168.19
1970.00    0.875   163.35
1980.00    0.885   158.66
1990.00    0.890   154.05
2000.00    0.893   149.48
2010.00    0.893   144.92
2020.00    0.893   140.36
2030.00    0.893   135.80
2040.00    0.894   131.25
2050.00    0.897   126.72
2060.00    0.902   122.23
2070.00    0.909   117.80
2080.00    0.919   113.44
2090.00    0.931   109.19
2100.00    0.946   105.07
2110.00    0.964   101.08
2120.00    0.984    97.24
2130.00    1.006    93.56
2140.00    1.031    90.06
2150.00    1.057    86.72
2160.00    1.085    83.55
2170.00    1.115    80.55
2180.00    1.147    77.70
2190.00    1.179    75.01
2200.00    1.213    72.47
2210.00    1.248    70.07
2220.00    1.283    67.80
2230.00    1.319    65.65
2240.00    1.356    63.62
2250.00    1.393    61.70
2260.00    1.430    59.87
2270.00    1.468    58.14
2280.00    1.505    56.49
2290.00    1.543    54.93
2300.00    1.581    53.44
2310.00    1.618    52.02
2320.00    1.656    50.66
2330.00    1.693    49.36
2340.00    1.730    48.12
2350.00    1.767    46.93
2360.00    1.804    45.79
2370.00    1.840    44.70
2380.00    1.875    43.64
2390.00    1.911    42.63
2400.00    1.946    41.65
2410.00    1.980    40.71
2420.00    2.014    39.80
2430.00    2.047    38.92
2440.00    2.080    38.06
2450.00    2.113    37.24
2460.00    2.145    36.43
2470.00    2.176    35.65
2480.00    2.206    34.90
2490.00    2.236    34.16
2500.00    2.266    33.44
2510.00    2.295    32.74
2520.00    2.323    32.06
2530.00    2.350    31.40
2540.00    2.377    30.74
2550.00    2.403    30.11
2560.00    2.428    29.49
2570.00    2.453    28.87
2580.00    2.477    28.28
2590.00    2.500    27.69
2600.00    2.523    27.11
2610.00    2.545    26.55
2620.00    2.566    25.99
2630.00    2.586    25.44
2640.00    2.606    24.90
2650.00    2.624    24.37
2660.00    2.642    23.85
2670.00    2.659    23.33
2680.00    2.676    22.82
2690.00    2.691    22.31
2700.00    2.706    21.82
2710.00    2.719    21.32
2720.00    2.732    20.83
2730.00    2.744    20.35
2740.00    2.756    19.87
2750.00    2.766    19.39
2760.00    2.775    18.92
2770.00    2.784    18.45
2780.00    2.791    17.98






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 14:42:22



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