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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:32:37

Orbital Elements for BU513AB

WDS:	BU513AB	WDS ID/Discoverer
P:	61.140	Orbital period (years)
a:	0.614	Semi-major axis (arcseconds)
i:	16.7	Inclination (degrees)
Ω:	48.2	Longitude of ascending node (degrees)
T:	1964.350	Epoch of periastron passage (year)
e:	0.355	Eccentricity
ω:	19.5	Longitude of periastron (degrees)
Start-Year:	1995.0	Year
End-Year:	2055.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU513AB

Position:	020157.55+705425.4	Epoch-2000 right ascension and declination
WDS-ID:	02020+7054	WDS designation
Discoverer Code:	BU513AB	Discover designation and components
ADS number:	1598	Aitken Double Star catalog
HD number:	12111	HD catalog number
Hipparcos number:	9480	Hipparcos catalog number
V1:	4.65	Magnitude of the primary
V2:	6.74	Magnitude of the secondary
Equinox:		Equinox
Date:	2010	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU513AB

WDS 6th Orbit including measures of BU513AB

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

Ephemeris of BU513AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.396     60.7
-------------------------
1995.0     0.828    247.2
1996.0     0.826    250.1
1997.0     0.823    253.0
1998.0     0.818    255.9
1999.0     0.812    258.9
2000.0     0.805    262.0
2001.0     0.796    265.1
2002.0     0.786    268.3
2003.0     0.775    271.5
2004.0     0.762    274.9
2005.0     0.749    278.4
2006.0     0.734    282.0
2007.0     0.718    285.8
2008.0     0.701    289.7
2009.0     0.683    293.9
2010.0     0.664    298.3
2011.0     0.644    302.9
2012.0     0.623    307.9
2013.0     0.602    313.1
2014.0     0.581    318.8
2015.0     0.559    325.0
2016.0     0.537    331.6
2017.0     0.516    338.7
2018.0     0.495    346.5
2019.0     0.475    355.0
2020.0     0.456      4.2
2021.0     0.439     14.1
2022.0     0.424     24.8
2023.0     0.412     36.2
2024.0     0.402     48.2
2025.0     0.396     60.7
2026.0     0.394     73.5
2027.0     0.396     86.3
2028.0     0.402     98.8
2029.0     0.413    110.8
2030.0     0.428    122.0
2031.0     0.447    132.4
2032.0     0.468    141.9
2033.0     0.492    150.6
2034.0     0.516    158.4
2035.0     0.541    165.5
2036.0     0.566    172.0
2037.0     0.591    177.9
2038.0     0.615    183.4
2039.0     0.639    188.4
2040.0     0.661    193.1
2041.0     0.682    197.5
2042.0     0.702    201.7
2043.0     0.720    205.6
2044.0     0.737    209.4
2045.0     0.753    213.0
2046.0     0.767    216.4
2047.0     0.780    219.7
2048.0     0.791    222.9
2049.0     0.801    226.1
2050.0     0.809    229.1
2051.0     0.816    232.2
2052.0     0.821    235.1
2053.0     0.825    238.1
2054.0     0.827    241.0

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.