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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:21:10

Orbital Elements for BU838
WDS: BU838 WDS ID/Discoverer
P: 1023.389 Orbital period (years)
a: 5.36256 Semi-major axis (arcseconds)
i: 77.217 Inclination (degrees)
Ω: 169.101 Longitude of ascending node (degrees)
T: 2050.745 Epoch of periastron passage (year)
e: 0.85848 Eccentricity
ω: 68.921 Longitude of periastron (degrees)
Start-Year: 1514.0 Year
End-Year: 2536.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU838
Position: 212055.78+030705.6 Epoch-2000 right ascension and declination
WDS-ID: 21209+0307 WDS designation
Discoverer Code: BU838 Discover designation and components
ADS number: 14880 Aitken Double Star catalog
HD number: 203235 HD catalog number
Hipparcos number: 105399 Hipparcos catalog number
V1: 7.92 Magnitude of the primary
V2: 10.02 Magnitude of the secondary
Equinox: Equinox
Date: 2007 Date of last observation
Orbit grade: 5 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BU838



WDS 6th Orbit including measures of BU838

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


Ephemeris of BU838
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.518    158.8
-------------------------
1514.0     4.302     17.3
1524.0     4.236     18.0
1534.0     4.168     18.6
1544.0     4.098     19.3
1554.0     4.026     20.0
1564.0     3.953     20.7
1574.0     3.878     21.5
1584.0     3.801     22.2
1594.0     3.723     23.0
1604.0     3.643     23.9
1614.0     3.562     24.8
1624.0     3.479     25.7
1634.0     3.396     26.7
1644.0     3.311     27.7
1654.0     3.225     28.8
1664.0     3.138     29.9
1674.0     3.051     31.1
1684.0     2.963     32.4
1694.0     2.874     33.7
1704.0     2.785     35.2
1714.0     2.696     36.7
1724.0     2.607     38.3
1734.0     2.518     40.1
1744.0     2.430     41.9
1754.0     2.342     44.0
1764.0     2.256     46.1
1774.0     2.171     48.5
1784.0     2.087     51.0
1794.0     2.007     53.8
1804.0     1.929     56.7
1814.0     1.854     59.9
1824.0     1.784     63.4
1834.0     1.719     67.1
1844.0     1.659     71.2
1854.0     1.606     75.5
1864.0     1.560     80.1
1874.0     1.521     84.9
1884.0     1.492     90.0
1894.0     1.472     95.2
1904.0     1.460    100.6
1914.0     1.459    106.0
1924.0     1.466    111.3
1934.0     1.481    116.6
1944.0     1.502    121.8
1954.0     1.529    126.8
1964.0     1.559    131.6
1974.0     1.590    136.2
1984.0     1.617    140.7
1994.0     1.635    145.0
2004.0     1.638    149.3
2014.0     1.611    153.6
2024.0     1.531    158.3
2034.0     1.342    163.7
2044.0     0.894    172.8
2054.0     0.203    288.6
2064.0     1.109    342.1
2074.0     1.795    347.7
2084.0     2.305    350.4
2094.0     2.708    352.3
2104.0     3.039    353.7
2114.0     3.319    354.8
2124.0     3.558    355.8
2134.0     3.766    356.6
2144.0     3.948    357.4
2154.0     4.108    358.1
2164.0     4.249    358.8
2174.0     4.374    359.4
2184.0     4.484    360.0
2194.0     4.582      0.5
2204.0     4.668      1.1
2214.0     4.745      1.6
2224.0     4.811      2.1
2234.0     4.869      2.6
2244.0     4.919      3.0
2254.0     4.962      3.5
2264.0     4.997      4.0
2274.0     5.026      4.4
2284.0     5.050      4.9
2294.0     5.067      5.3
2304.0     5.079      5.8
2314.0     5.086      6.2
2324.0     5.088      6.7
2334.0     5.086      7.1
2344.0     5.079      7.6
2354.0     5.069      8.0
2364.0     5.054      8.5
2374.0     5.035      8.9
2384.0     5.013      9.4
2394.0     4.987      9.8
2404.0     4.958     10.3
2414.0     4.926     10.7
2424.0     4.890     11.2
2434.0     4.852     11.7
2444.0     4.811     12.2
2454.0     4.767     12.7
2464.0     4.720     13.2
2474.0     4.670     13.7
2484.0     4.619     14.3
2494.0     4.564     14.8
2504.0     4.508     15.4
2514.0     4.449     15.9
2524.0     4.387     16.5
2534.0     4.324     17.1






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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