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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:44:22

Orbital Elements for BU524AB

WDS:	BU524AB	WDS ID/Discoverer
P:	31.634	Orbital period (years)
a:	0.2224	Semi-major axis (arcseconds)
i:	120.48	Inclination (degrees)
Ω:	26.62	Longitude of ascending node (degrees)
T:	1996.471	Epoch of periastron passage (year)
e:	0.756	Eccentricity
ω:	265.54	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU524AB

Position:	025342.58+382015.6	Epoch-2000 right ascension and declination
WDS-ID:	02537+3820	WDS designation
Discoverer Code:	BU524AB	Discover designation and components
ADS number:	2200	Aitken Double Star catalog
HD number:	17904	HD catalog number
Hipparcos number:	13490	Hipparcos catalog number
V1:	5.79	Magnitude of the primary
V2:	6.80	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU524AB

WDS 6th Orbit including measures of BU524AB

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

Ephemeris of BU524AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.148    233.3
-------------------------
2010.0     0.204    315.9
2011.0     0.202    311.3
2012.0     0.200    306.7
2013.0     0.198    302.0
2014.0     0.196    297.2
2015.0     0.194    292.3
2016.0     0.192    287.3
2017.0     0.190    282.2
2018.0     0.188    277.0
2019.0     0.185    271.6
2020.0     0.182    266.1
2021.0     0.179    260.4
2022.0     0.174    254.4
2023.0     0.168    248.0
2024.0     0.160    241.1
2025.0     0.148    233.3
2026.0     0.129    223.7
2027.0     0.095    208.9
2028.0     0.031    148.3
2029.0     0.083     33.7
2030.0     0.130     17.1
2031.0     0.157      8.1
2032.0     0.174      1.3
2033.0     0.186    355.5
2034.0     0.194    350.3
2035.0     0.199    345.5
2036.0     0.203    340.9
2037.0     0.205    336.4
2038.0     0.206    332.0
2039.0     0.206    327.6

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.