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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:58:51

Orbital Elements for BU744AB

WDS:	BU744AB	WDS ID/Discoverer
P:	81.025	Orbital period (years)
a:	0.48	Semi-major axis (arcseconds)
i:	32.65	Inclination (degrees)
Ω:	356.65	Longitude of ascending node (degrees)
T:	1924.014	Epoch of periastron passage (year)
e:	0.59	Eccentricity
ω:	110.93	Longitude of periastron (degrees)
Start-Year:	1985.0	Year
End-Year:	2065.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU744AB

Position:	042131.29-254342.4	Epoch-2000 right ascension and declination
WDS-ID:	04215-2544	WDS designation
Discoverer Code:	BU744AB	Discover designation and components
ADS number:	3159	Aitken Double Star catalog
HD number:	27710	HD catalog number
Hipparcos number:	20347	Hipparcos catalog number
V1:	7.26	Magnitude of the primary
V2:	6.56	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1989	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU744AB

WDS 6th Orbit including measures of BU744AB

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

Ephemeris of BU744AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.523    251.6
-------------------------
1985.0     0.585    325.6
1986.0     0.574    327.7
1987.0     0.561    329.8
1988.0     0.548    332.1
1989.0     0.533    334.5
1990.0     0.518    337.0
1991.0     0.501    339.7
1992.0     0.483    342.6
1993.0     0.463    345.7
1994.0     0.442    349.1
1995.0     0.419    352.8
1996.0     0.394    357.0
1997.0     0.368      1.8
1998.0     0.339      7.4
1999.0     0.309     14.0
2000.0     0.277     22.2
2001.0     0.245     32.4
2002.0     0.213     45.8
2003.0     0.186     63.4
2004.0     0.170     85.6
2005.0     0.170    110.1
2006.0     0.184    132.7
2007.0     0.207    151.0
2008.0     0.233    165.4
2009.0     0.259    177.0
2010.0     0.284    186.4
2011.0     0.307    194.4
2012.0     0.328    201.3
2013.0     0.348    207.4
2014.0     0.367    212.8
2015.0     0.385    217.8
2016.0     0.401    222.3
2017.0     0.417    226.4
2018.0     0.433    230.3
2019.0     0.447    233.9
2020.0     0.461    237.2
2021.0     0.475    240.4
2022.0     0.487    243.4
2023.0     0.500    246.3
2024.0     0.511    249.0
2025.0     0.523    251.6
2026.0     0.534    254.1
2027.0     0.544    256.5
2028.0     0.554    258.8
2029.0     0.564    261.0
2030.0     0.573    263.2
2031.0     0.581    265.3
2032.0     0.590    267.3
2033.0     0.597    269.3
2034.0     0.605    271.2
2035.0     0.612    273.1
2036.0     0.618    274.9
2037.0     0.625    276.7
2038.0     0.630    278.5
2039.0     0.636    280.3
2040.0     0.640    282.0
2041.0     0.645    283.6
2042.0     0.649    285.3
2043.0     0.652    287.0
2044.0     0.655    288.6
2045.0     0.658    290.2
2046.0     0.660    291.8
2047.0     0.662    293.4
2048.0     0.663    295.0
2049.0     0.664    296.6
2050.0     0.664    298.1
2051.0     0.664    299.7
2052.0     0.663    301.3
2053.0     0.661    302.9
2054.0     0.659    304.5
2055.0     0.657    306.1
2056.0     0.654    307.7
2057.0     0.650    309.3
2058.0     0.646    311.0
2059.0     0.641    312.7
2060.0     0.635    314.4
2061.0     0.629    316.1
2062.0     0.622    317.9
2063.0     0.614    319.7
2064.0     0.605    321.6

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.