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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:53:07

Orbital Elements for BU1181AB

WDS:	BU1181AB	WDS ID/Discoverer
P:	46.200	Orbital period (years)
a:	0.27	Semi-major axis (arcseconds)
i:	90.3	Inclination (degrees)
Ω:	269.9	Longitude of ascending node (degrees)
T:	1974.800	Epoch of periastron passage (year)
e:	0.79	Eccentricity
ω:	50.1	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1181AB

Position:	034115.89+455345.0	Epoch-2000 right ascension and declination
WDS-ID:	03413+4554	WDS designation
Discoverer Code:	BU1181AB	Discover designation and components
ADS number:	2680	Aitken Double Star catalog
HD number:	22743	HD catalog number
Hipparcos number:	17217	Hipparcos catalog number
V1:	8.20	Magnitude of the primary
V2:	9.90	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1181AB

WDS 6th Orbit including measures of BU1181AB

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

Ephemeris of BU1181AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.214     89.9
-------------------------
2002.0     0.262     89.5
2003.0     0.248     89.4
2004.0     0.234     89.4
2005.0     0.218     89.4
2006.0     0.201     89.3
2007.0     0.184     89.3
2008.0     0.165     89.2
2009.0     0.146     89.1
2010.0     0.126     89.0
2011.0     0.106     88.9
2012.0     0.084     88.7
2013.0     0.062     88.3
2014.0     0.039     87.6
2015.0     0.016     84.7
2016.0     0.008    279.5
2017.0     0.031    272.0
2018.0     0.053    270.9
2019.0     0.071    270.4
2020.0     0.077    270.1
2021.0     0.036    269.5
2022.0     0.055     90.3
2023.0     0.125     90.0
2024.0     0.175     89.9
2025.0     0.214     89.9
2026.0     0.245     89.9
2027.0     0.270     89.8
2028.0     0.290     89.8
2029.0     0.306     89.8
2030.0     0.320     89.8
2031.0     0.330     89.7
2032.0     0.338     89.7
2033.0     0.344     89.7
2034.0     0.348     89.7
2035.0     0.351     89.7
2036.0     0.352     89.7
2037.0     0.351     89.7
2038.0     0.349     89.6
2039.0     0.345     89.6
2040.0     0.341     89.6
2041.0     0.335     89.6
2042.0     0.328     89.6
2043.0     0.320     89.6
2044.0     0.311     89.5
2045.0     0.301     89.5
2046.0     0.290     89.5
2047.0     0.278     89.5

Disclaimer

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.