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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:14:49

Orbital Elements for BU151AB
WDS: BU151AB WDS ID/Discoverer
P: 26.683 Orbital period (years)
a: 0.43701 Semi-major axis (arcseconds)
i: 61.323 Inclination (degrees)
Ω: 357.179 Longitude of ascending node (degrees)
T: 1962.812 Epoch of periastron passage (year)
e: 0.35595 Eccentricity
ω: 168.86 Longitude of periastron (degrees)
Start-Year: 2012.0 Year
End-Year: 2038.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU151AB
Position: 203732.87+143542.7 Epoch-2000 right ascension and declination
WDS-ID: 20375+1436 WDS designation
Discoverer Code: BU151AB Discover designation and components
ADS number: 14073 Aitken Double Star catalog
HD number: 196524 HD catalog number
Hipparcos number: 101769 Hipparcos catalog number
V1: 4.11 Magnitude of the primary
V2: 5.02 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2008 Date of last observation
Orbit grade: 1 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BU151AB



WDS 6th Orbit including measures of BU151AB

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


Ephemeris of BU151AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.432    332.4
-------------------------
2012.0     0.222     52.3
2013.0     0.173     83.4
2014.0     0.181    122.6
2015.0     0.229    150.9
2016.0     0.273    169.1
2017.0     0.282    183.7
2018.0     0.257    199.4
2019.0     0.218    220.0
2020.0     0.193    248.2
2021.0     0.207    278.2
2022.0     0.253    300.7
2023.0     0.313    315.4
2024.0     0.374    325.2
2025.0     0.432    332.4
2026.0     0.482    337.9
2027.0     0.524    342.4
2028.0     0.556    346.4
2029.0     0.577    350.0
2030.0     0.588    353.4
2031.0     0.587    356.7
2032.0     0.576      0.1
2033.0     0.552      3.8
2034.0     0.517      7.8
2035.0     0.470     12.5
2036.0     0.412     18.5
2037.0     0.344     26.6






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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