Double Star Calculator - Orbit

Orbital Elements for BU1216

WDS:	BU1216	WDS ID/Discoverer
P:	1444.933	Orbital period (years)
a:	2.73808	Semi-major axis (arcseconds)
i:	98.407	Inclination (degrees)
Ω:	81.512	Longitude of ascending node (degrees)
T:	2115.529	Epoch of periastron passage (year)
e:	0.80246	Eccentricity
ω:	244.552	Longitude of periastron (degrees)
Start-Year:	1302.53345	Year
End-Year:	2747.46655	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1216
Position:	222012.75+293107.8	Epoch-2000 right ascension and declination
WDS-ID:	22202+2931	WDS designation
Discoverer Code:	BU1216	Discover designation and components
ADS number:	15843	Aitken Double Star catalog
HD number:	211933	HD catalog number
Hipparcos number:	110276	Hipparcos catalog number
V1:	8.61	Magnitude of the primary
V2:	9.21	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for BU1216

WDS 6th Orbit including measures of BU1216

-- 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 BU1216

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.929   275.14
--------------------------
1302.53    2.492    67.09
1312.53    2.465    66.83
1322.53    2.436    66.55
1332.53    2.408    66.28
1342.53    2.378    65.99
1352.53    2.348    65.70
1362.53    2.317    65.40
1372.53    2.285    65.09
1382.53    2.253    64.78
1392.53    2.220    64.45
1402.53    2.187    64.11
1412.53    2.152    63.77
1422.53    2.118    63.41
1432.53    2.082    63.04
1442.53    2.046    62.66
1452.53    2.010    62.26
1462.53    1.972    61.85
1472.53    1.935    61.42
1482.53    1.897    60.98
1492.53    1.858    60.52
1502.53    1.819    60.04
1512.53    1.779    59.53
1522.53    1.739    59.01
1532.53    1.698    58.45
1542.53    1.657    57.87
1552.53    1.616    57.27
1562.53    1.574    56.63
1572.53    1.532    55.95
1582.53    1.489    55.23
1592.53    1.446    54.48
1602.53    1.403    53.67
1612.53    1.360    52.82
1622.53    1.316    51.91
1632.53    1.272    50.94
1642.53    1.228    49.89
1652.53    1.184    48.77
1662.53    1.141    47.57
1672.53    1.097    46.27
1682.53    1.053    44.85
1692.53    1.009    43.32
1702.53    0.966    41.65
1712.53    0.923    39.82
1722.53    0.881    37.81
1732.53    0.839    35.61
1742.53    0.798    33.18
1752.53    0.759    30.49
1762.53    0.721    27.51
1772.53    0.684    24.20
1782.53    0.650    20.54
1792.53    0.618    16.48
1802.53    0.590    12.01
1812.53    0.565     7.11
1822.53    0.543     1.79
1832.53    0.527   356.09
1842.53    0.515   350.08
1852.53    0.509   343.86
1862.53    0.509   337.56
1872.53    0.514   331.32
1882.53    0.525   325.27
1892.53    0.540   319.52
1902.53    0.560   314.13
1912.53    0.584   309.14
1922.53    0.611   304.58
1932.53    0.641   300.41
1942.53    0.672   296.63
1952.53    0.705   293.19
1962.53    0.739   290.07
1972.53    0.773   287.22
1982.53    0.806   284.60
1992.53    0.839   282.19
2002.53    0.869   279.96
2012.53    0.897   277.87
2022.53    0.921   275.89
2032.53    0.940   274.01
2042.53    0.952   272.19
2052.53    0.954   270.40
2062.53    0.943   268.60
2072.53    0.914   266.72
2082.53    0.855   264.65
2092.53    0.754   262.15
2102.53    0.587   258.54
2112.53    0.333   250.45
2122.53    0.083   168.58
2132.53    0.349    95.58
2142.53    0.637    88.34
2152.53    0.884    85.47
2162.53    1.096    83.80
2172.53    1.279    82.64
2182.53    1.440    81.76
2192.53    1.581    81.05
2202.53    1.708    80.44
2212.53    1.821    79.92
2222.53    1.924    79.46
2232.53    2.017    79.04
2242.53    2.102    78.65
2252.53    2.179    78.30
2262.53    2.250    77.97
2272.53    2.315    77.65
2282.53    2.374    77.36
2292.53    2.428    77.07
2302.53    2.478    76.80
2312.53    2.524    76.54
2322.53    2.566    76.29
2332.53    2.604    76.05
2342.53    2.639    75.81
2352.53    2.671    75.58
2362.53    2.699    75.35
2372.53    2.725    75.13
2382.53    2.749    74.91
2392.53    2.770    74.70
2402.53    2.788    74.49
2412.53    2.805    74.28
2422.53    2.819    74.07
2432.53    2.831    73.87
2442.53    2.841    73.67
2452.53    2.849    73.47
2462.53    2.856    73.27
2472.53    2.860    73.07
2482.53    2.863    72.87
2492.53    2.865    72.67
2502.53    2.865    72.47
2512.53    2.863    72.27
2522.53    2.860    72.07
2532.53    2.856    71.87
2542.53    2.850    71.67
2552.53    2.843    71.47
2562.53    2.835    71.27
2572.53    2.826    71.07
2582.53    2.815    70.86
2592.53    2.803    70.66
2602.53    2.790    70.45
2612.53    2.776    70.24
2622.53    2.761    70.02
2632.53    2.745    69.81
2642.53    2.728    69.59
2652.53    2.709    69.37
2662.53    2.690    69.15
2672.53    2.670    68.92
2682.53    2.649    68.69
2692.53    2.627    68.46
2702.53    2.604    68.22
2712.53    2.581    67.98
2722.53    2.556    67.73
2732.53    2.531    67.48
2742.53    2.505    67.22

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 18:38:36