Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 16:16:22

Orbital Elements for BU281AB
WDS: BU281AB WDS ID/Discoverer
P: 1117.000 Orbital period (years)
a: 3.14 Semi-major axis (arcseconds)
i: 108.5 Inclination (degrees)
Ω: 149.9 Longitude of ascending node (degrees)
T: 2077.500 Epoch of periastron passage (year)
e: 0.639 Eccentricity
ω: 55.7 Longitude of periastron (degrees)
Start-Year: 1467.0 Year
End-Year: 2583.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU281AB
Position: 000247.14+020749.4 Epoch-2000 right ascension and declination
WDS-ID: 00028+0208 WDS designation
Discoverer Code: BU281AB Discover designation and components
ADS number: 9 Aitken Double Star catalog
HD number: 225028 HD catalog number
Hipparcos number: 223 Hipparcos catalog number
V1: 7.40 Magnitude of the primary
V2: 9.36 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2014 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU281AB



WDS 6th Orbit including measures of BU281AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)


Ephemeris of BU281AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.524    156.9
-------------------------
1467.0     3.464    308.6
1477.0     3.417    307.9
1487.0     3.368    307.3
1497.0     3.317    306.6
1507.0     3.264    305.8
1517.0     3.210    305.1
1527.0     3.153    304.3
1537.0     3.095    303.5
1547.0     3.036    302.7
1557.0     2.974    301.9
1567.0     2.912    301.0
1577.0     2.848    300.0
1587.0     2.782    299.1
1597.0     2.716    298.0
1607.0     2.648    296.9
1617.0     2.580    295.8
1627.0     2.510    294.6
1637.0     2.440    293.3
1647.0     2.368    292.0
1657.0     2.297    290.6
1667.0     2.225    289.1
1677.0     2.153    287.4
1687.0     2.080    285.7
1697.0     2.009    283.9
1707.0     1.937    281.9
1717.0     1.866    279.7
1727.0     1.796    277.4
1737.0     1.728    274.9
1747.0     1.661    272.2
1757.0     1.597    269.3
1767.0     1.535    266.1
1777.0     1.477    262.7
1787.0     1.422    259.0
1797.0     1.372    255.0
1807.0     1.328    250.8
1817.0     1.289    246.2
1827.0     1.257    241.4
1837.0     1.232    236.4
1847.0     1.215    231.2
1857.0     1.206    225.9
1867.0     1.205    220.6
1877.0     1.212    215.3
1887.0     1.227    210.1
1897.0     1.248    205.0
1907.0     1.275    200.1
1917.0     1.308    195.5
1927.0     1.344    191.0
1937.0     1.382    186.9
1947.0     1.422    182.9
1957.0     1.461    179.2
1967.0     1.498    175.6
1977.0     1.530    172.3
1987.0     1.555    169.0
1997.0     1.570    165.8
2007.0     1.572    162.7
2017.0     1.555    159.5
2027.0     1.514    156.2
2037.0     1.442    152.7
2047.0     1.330    148.7
2057.0     1.171    143.7
2067.0     0.963    136.9
2077.0     0.717    125.7
2087.0     0.480    102.9
2097.0     0.388     56.8
2107.0     0.545     17.4
2117.0     0.807    359.7
2127.0     1.082    350.8
2137.0     1.345    345.5
2147.0     1.591    341.8
2157.0     1.817    339.2
2167.0     2.025    337.1
2177.0     2.216    335.3
2187.0     2.390    333.9
2197.0     2.550    332.6
2207.0     2.696    331.5
2217.0     2.830    330.5
2227.0     2.952    329.5
2237.0     3.064    328.7
2247.0     3.166    327.9
2257.0     3.258    327.1
2267.0     3.343    326.4
2277.0     3.420    325.7
2287.0     3.489    325.1
2297.0     3.551    324.5
2307.0     3.607    323.9
2317.0     3.657    323.3
2327.0     3.701    322.7
2337.0     3.739    322.1
2347.0     3.772    321.6
2357.0     3.801    321.0
2367.0     3.824    320.5
2377.0     3.843    320.0
2387.0     3.857    319.5
2397.0     3.868    318.9
2407.0     3.874    318.4
2417.0     3.877    317.9
2427.0     3.876    317.4
2437.0     3.871    316.9
2447.0     3.863    316.4
2457.0     3.852    315.8
2467.0     3.837    315.3
2477.0     3.820    314.8
2487.0     3.799    314.2
2497.0     3.776    313.7
2507.0     3.749    313.2
2517.0     3.721    312.6
2527.0     3.689    312.0
2537.0     3.655    311.5
2547.0     3.619    310.9
2557.0     3.580    310.3
2567.0     3.539    309.7
2577.0     3.495    309.0






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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.


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