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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:17:53

Orbital Elements for BU1026AB

WDS:	BU1026AB	WDS ID/Discoverer
P:	66.840	Orbital period (years)
a:	0.2514	Semi-major axis (arcseconds)
i:	42.77	Inclination (degrees)
Ω:	254.9	Longitude of ascending node (degrees)
T:	1986.542	Epoch of periastron passage (year)
e:	0.8282	Eccentricity
ω:	255.2	Longitude of periastron (degrees)
Start-Year:	1992.0	Year
End-Year:	2058.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1026AB

Position:	001208.05+533726.1	Epoch-2000 right ascension and declination
WDS-ID:	00121+5337	WDS designation
Discoverer Code:	BU1026AB	Discover designation and components
ADS number:	148	Aitken Double Star catalog
HD number:	761	HD catalog number
Hipparcos number:	981	Hipparcos catalog number
V1:	7.25	Magnitude of the primary
V2:	8.46	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1026AB

WDS 6th Orbit including measures of BU1026AB

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

Ephemeris of BU1026AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.337    331.1
-------------------------
1992.0     0.185    279.4
1993.0     0.203    283.1
1994.0     0.219    286.3
1995.0     0.233    289.0
1996.0     0.245    291.5
1997.0     0.257    293.7
1998.0     0.267    295.8
1999.0     0.277    297.6
2000.0     0.286    299.4
2001.0     0.294    301.1
2002.0     0.301    302.7
2003.0     0.308    304.2
2004.0     0.314    305.6
2005.0     0.319    307.0
2006.0     0.324    308.4
2007.0     0.329    309.7
2008.0     0.333    311.0
2009.0     0.336    312.2
2010.0     0.339    313.5
2011.0     0.342    314.7
2012.0     0.344    315.9
2013.0     0.345    317.0
2014.0     0.347    318.2
2015.0     0.348    319.4
2016.0     0.348    320.5
2017.0     0.348    321.7
2018.0     0.348    322.8
2019.0     0.348    324.0
2020.0     0.347    325.1
2021.0     0.345    326.3
2022.0     0.344    327.5
2023.0     0.342    328.7
2024.0     0.339    329.9
2025.0     0.337    331.1
2026.0     0.334    332.4
2027.0     0.330    333.6
2028.0     0.326    334.9
2029.0     0.322    336.3
2030.0     0.318    337.6
2031.0     0.313    339.0
2032.0     0.308    340.5
2033.0     0.302    342.0
2034.0     0.296    343.6
2035.0     0.290    345.2
2036.0     0.283    346.9
2037.0     0.276    348.7
2038.0     0.268    350.6
2039.0     0.260    352.6
2040.0     0.251    354.8
2041.0     0.242    357.1
2042.0     0.232    359.6
2043.0     0.222      2.3
2044.0     0.211      5.3
2045.0     0.199      8.6
2046.0     0.186     12.4
2047.0     0.173     16.7
2048.0     0.158     21.9
2049.0     0.142     28.1
2050.0     0.124     36.0
2051.0     0.103     46.9
2052.0     0.077     64.1
2053.0     0.043    105.2
2054.0     0.045    213.5
2055.0     0.086    248.6
2056.0     0.119    262.0
2057.0     0.146    270.0

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.