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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:15:45

Orbital Elements for BU1240AB

WDS:	BU1240AB	WDS ID/Discoverer
P:	52.735	Orbital period (years)
a:	0.154	Semi-major axis (arcseconds)
i:	124.22	Inclination (degrees)
Ω:	127.08	Longitude of ascending node (degrees)
T:	1974.927	Epoch of periastron passage (year)
e:	0.653	Eccentricity
ω:	309.07	Longitude of periastron (degrees)
Start-Year:	1999.0	Year
End-Year:	2051.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1240AB

Position:	053838.10+302932.8	Epoch-2000 right ascension and declination
WDS-ID:	05386+3030	WDS designation
Discoverer Code:	BU1240AB	Discover designation and components
ADS number:	4229	Aitken Double Star catalog
HD number:	37269	HD catalog number
Hipparcos number:	26536	Hipparcos catalog number
V1:	6.29	Magnitude of the primary
V2:	6.21	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2004	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1240AB

WDS 6th Orbit including measures of BU1240AB

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

Ephemeris of BU1240AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.066    277.0
-------------------------
1999.0     0.186    346.1
2000.0     0.190    344.2
2001.0     0.194    342.3
2002.0     0.198    340.5
2003.0     0.201    338.8
2004.0     0.203    337.1
2005.0     0.206    335.5
2006.0     0.207    333.8
2007.0     0.209    332.3
2008.0     0.209    330.7
2009.0     0.209    329.1
2010.0     0.209    327.5
2011.0     0.207    325.9
2012.0     0.205    324.3
2013.0     0.202    322.6
2014.0     0.199    320.9
2015.0     0.194    319.1
2016.0     0.188    317.2
2017.0     0.182    315.2
2018.0     0.174    313.1
2019.0     0.164    310.6
2020.0     0.153    307.9
2021.0     0.141    304.7
2022.0     0.126    300.9
2023.0     0.109    295.8
2024.0     0.089    288.7
2025.0     0.066    277.0
2026.0     0.043    252.5
2027.0     0.033    197.2
2028.0     0.047    149.7
2029.0     0.063    126.8
2030.0     0.072    111.7
2031.0     0.076     99.2
2032.0     0.079     87.9
2033.0     0.082     77.2
2034.0     0.085     67.2
2035.0     0.088     58.0
2036.0     0.092     49.5
2037.0     0.097     41.7
2038.0     0.103     34.8
2039.0     0.109     28.6
2040.0     0.115     23.1
2041.0     0.121     18.2
2042.0     0.128     13.8
2043.0     0.135      9.8
2044.0     0.141      6.1
2045.0     0.148      2.8
2046.0     0.154    359.8
2047.0     0.160    357.0
2048.0     0.166    354.5
2049.0     0.172    352.0
2050.0     0.177    349.8

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.