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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:01:10

Orbital Elements for BU137AB
WDS: BU137AB WDS ID/Discoverer
P: 1135.735 Orbital period (years)
a: 3.61436 Semi-major axis (arcseconds)
i: 76.953 Inclination (degrees)
Ω: 177.051 Longitude of ascending node (degrees)
T: 2080.596 Epoch of periastron passage (year)
e: 0.77425 Eccentricity
ω: 69.393 Longitude of periastron (degrees)
Start-Year: 1458.0 Year
End-Year: 2592.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU137AB
Position: 185357.56+372249.7 Epoch-2000 right ascension and declination
WDS-ID: 18540+3723 WDS designation
Discoverer Code: BU137AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 8.69 Magnitude of the primary
V2: 9.02 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BU137AB



WDS 6th Orbit including measures of BU137AB

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


Ephemeris of BU137AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.517    166.5
-------------------------
1458.0     2.915     23.8
1468.0     2.866     24.5
1478.0     2.816     25.3
1488.0     2.764     26.0
1498.0     2.712     26.8
1508.0     2.658     27.6
1518.0     2.604     28.5
1528.0     2.549     29.4
1538.0     2.493     30.3
1548.0     2.436     31.3
1558.0     2.379     32.3
1568.0     2.321     33.4
1578.0     2.263     34.5
1588.0     2.204     35.7
1598.0     2.146     36.9
1608.0     2.087     38.3
1618.0     2.028     39.7
1628.0     1.969     41.1
1638.0     1.910     42.7
1648.0     1.852     44.4
1658.0     1.794     46.2
1668.0     1.737     48.1
1678.0     1.681     50.1
1688.0     1.626     52.3
1698.0     1.572     54.6
1708.0     1.520     57.0
1718.0     1.470     59.7
1728.0     1.423     62.5
1738.0     1.378     65.5
1748.0     1.336     68.8
1758.0     1.297     72.2
1768.0     1.262     75.8
1778.0     1.231     79.6
1788.0     1.205     83.6
1798.0     1.184     87.7
1808.0     1.168     92.0
1818.0     1.158     96.4
1828.0     1.153    100.8
1838.0     1.153    105.3
1848.0     1.160    109.7
1858.0     1.171    114.1
1868.0     1.187    118.3
1878.0     1.208    122.5
1888.0     1.233    126.4
1898.0     1.262    130.2
1908.0     1.293    133.9
1918.0     1.326    137.3
1928.0     1.361    140.6
1938.0     1.396    143.7
1948.0     1.430    146.7
1958.0     1.463    149.5
1968.0     1.494    152.2
1978.0     1.520    154.8
1988.0     1.541    157.3
1998.0     1.553    159.8
2008.0     1.554    162.2
2018.0     1.539    164.7
2028.0     1.503    167.3
2038.0     1.436    170.0
2048.0     1.324    173.1
2058.0     1.143    177.0
2068.0     0.858    182.9
2078.0     0.450    197.8
2088.0     0.223    297.4
2098.0     0.654    340.7
2108.0     1.076    349.0
2118.0     1.429    352.8
2128.0     1.725    355.2
2138.0     1.976    357.0
2148.0     2.190    358.3
2158.0     2.376    359.5
2168.0     2.538      0.4
2178.0     2.680      1.3
2188.0     2.806      2.1
2198.0     2.916      2.8
2208.0     3.014      3.5
2218.0     3.101      4.1
2228.0     3.178      4.7
2238.0     3.246      5.3
2248.0     3.305      5.8
2258.0     3.358      6.4
2268.0     3.403      6.9
2278.0     3.442      7.4
2288.0     3.476      7.9
2298.0     3.504      8.4
2308.0     3.527      8.9
2318.0     3.546      9.3
2328.0     3.560      9.8
2338.0     3.570     10.3
2348.0     3.576     10.7
2358.0     3.578     11.2
2368.0     3.577     11.7
2378.0     3.573     12.1
2388.0     3.566     12.6
2398.0     3.556     13.0
2408.0     3.543     13.5
2418.0     3.527     14.0
2428.0     3.509     14.5
2438.0     3.488     14.9
2448.0     3.465     15.4
2458.0     3.439     15.9
2468.0     3.412     16.4
2478.0     3.382     17.0
2488.0     3.351     17.5
2498.0     3.317     18.0
2508.0     3.282     18.5
2518.0     3.245     19.1
2528.0     3.206     19.7
2538.0     3.166     20.3
2548.0     3.124     20.9
2558.0     3.081     21.5
2568.0     3.036     22.1
2578.0     2.990     22.8
2588.0     2.943     23.4






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.


www.stella-vega.de