Double Star Calculator - Orbit

Orbital Elements for BU1025AB

WDS:	BU1025AB	WDS ID/Discoverer
P:	1167.004	Orbital period (years)
a:	2.57536	Semi-major axis (arcseconds)
i:	74.009	Inclination (degrees)
Ω:	66.824	Longitude of ascending node (degrees)
T:	1845.389	Epoch of periastron passage (year)
e:	0.84308	Eccentricity
ω:	115.409	Longitude of periastron (degrees)
Start-Year:	1441.4978	Year
End-Year:	2608.5022	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1025AB
Position:	230748.16+124023.5	Epoch-2000 right ascension and declination
WDS-ID:	23078+1240	WDS designation
Discoverer Code:	BU1025AB	Discover designation and components
ADS number:	16524	Aitken Double Star catalog
HD number:	218430	HD catalog number
Hipparcos number:	114215	Hipparcos catalog number
V1:	7.77	Magnitude of the primary
V2:	9.75	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:		Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for BU1025AB

WDS 6th Orbit including measures of BU1025AB

-- 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 BU1025AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.844   334.11
--------------------------
1441.50    2.715    45.04
1451.50    2.723    45.45
1461.50    2.731    45.86
1471.50    2.736    46.26
1481.50    2.741    46.67
1491.50    2.743    47.07
1501.50    2.744    47.47
1511.50    2.743    47.87
1521.50    2.741    48.28
1531.50    2.737    48.68
1541.50    2.730    49.09
1551.50    2.722    49.49
1561.50    2.712    49.90
1571.50    2.699    50.32
1581.50    2.684    50.74
1591.50    2.667    51.16
1601.50    2.647    51.59
1611.50    2.625    52.03
1621.50    2.600    52.47
1631.50    2.571    52.92
1641.50    2.540    53.39
1651.50    2.505    53.86
1661.50    2.466    54.35
1671.50    2.424    54.86
1681.50    2.377    55.39
1691.50    2.326    55.93
1701.50    2.269    56.51
1711.50    2.207    57.11
1721.50    2.138    57.76
1731.50    2.063    58.44
1741.50    1.979    59.19
1751.50    1.887    60.00
1761.50    1.783    60.90
1771.50    1.668    61.91
1781.50    1.537    63.09
1791.50    1.387    64.51
1801.50    1.213    66.31
1811.50    1.007    68.77
1821.50    0.755    72.72
1831.50    0.437    81.70
1841.50    0.116   156.76
1851.50    0.406   239.09
1861.50    0.618   250.58
1871.50    0.718   257.29
1881.50    0.765   262.77
1891.50    0.785   267.79
1901.50    0.792   272.66
1911.50    0.790   277.50
1921.50    0.785   282.39
1931.50    0.778   287.35
1941.50    0.772   292.39
1951.50    0.768   297.50
1961.50    0.767   302.65
1971.50    0.768   307.80
1981.50    0.774   312.90
1991.50    0.783   317.91
2001.50    0.796   322.78
2011.50    0.813   327.47
2021.50    0.833   331.95
2031.50    0.857   336.20
2041.50    0.883   340.21
2051.50    0.913   343.97
2061.50    0.945   347.49
2071.50    0.979   350.77
2081.50    1.014   353.82
2091.50    1.052   356.67
2101.50    1.090   359.31
2111.50    1.130     1.77
2121.50    1.170     4.07
2131.50    1.212     6.20
2141.50    1.254     8.20
2151.50    1.296    10.06
2161.50    1.338    11.81
2171.50    1.381    13.45
2181.50    1.424    14.99
2191.50    1.467    16.45
2201.50    1.509    17.82
2211.50    1.552    19.11
2221.50    1.594    20.34
2231.50    1.636    21.50
2241.50    1.678    22.60
2251.50    1.719    23.65
2261.50    1.760    24.65
2271.50    1.800    25.61
2281.50    1.840    26.53
2291.50    1.880    27.40
2301.50    1.919    28.24
2311.50    1.957    29.05
2321.50    1.995    29.83
2331.50    2.032    30.57
2341.50    2.068    31.30
2351.50    2.104    31.99
2361.50    2.139    32.67
2371.50    2.173    33.32
2381.50    2.206    33.95
2391.50    2.239    34.56
2401.50    2.271    35.16
2411.50    2.302    35.74
2421.50    2.333    36.30
2431.50    2.362    36.86
2441.50    2.390    37.39
2451.50    2.418    37.92
2461.50    2.445    38.43
2471.50    2.471    38.93
2481.50    2.495    39.42
2491.50    2.519    39.90
2501.50    2.542    40.38
2511.50    2.564    40.84
2521.50    2.584    41.30
2531.50    2.604    41.75
2541.50    2.622    42.19
2551.50    2.640    42.63
2561.50    2.656    43.06
2571.50    2.671    43.49
2581.50    2.684    43.91
2591.50    2.697    44.33
2601.50    2.708    44.75

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 18:47:45