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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:19:46

Orbital Elements for LEI1A,BC

WDS:	LEI1A,BC	WDS ID/Discoverer
P:	44.400	Orbital period (years)
a:	1.1116	Semi-major axis (arcseconds)
i:	54.75	Inclination (degrees)
Ω:	26.8	Longitude of ascending node (degrees)
T:	2022.405	Epoch of periastron passage (year)
e:	0.52	Eccentricity
ω:	147.61	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for LEI1A,BC

Position:	002444.25-270827.9	Epoch-2000 right ascension and declination
WDS-ID:	00247-2653	WDS designation
Discoverer Code:	LEI1A,BC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	15.40	Magnitude of the primary
V2:	18.69	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for LEI1A,BC

WDS 6th Orbit including measures of LEI1A,BC

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

Ephemeris of LEI1A,BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.597    228.0
-------------------------
2003.0     1.576     12.4
2004.0     1.582     14.4
2005.0     1.581     16.4
2006.0     1.571     18.4
2007.0     1.553     20.4
2008.0     1.526     22.5
2009.0     1.490     24.6
2010.0     1.443     26.9
2011.0     1.386     29.4
2012.0     1.317     32.1
2013.0     1.236     35.1
2014.0     1.142     38.6
2015.0     1.034     42.8
2016.0     0.912     48.0
2017.0     0.777     55.0
2018.0     0.633     65.0
2019.0     0.489     81.0
2020.0     0.381    108.2
2021.0     0.364    145.7
2022.0     0.441    177.2
2023.0     0.531    198.2
2024.0     0.583    213.9
2025.0     0.597    228.0
2026.0     0.592    242.0
2027.0     0.585    256.3
2028.0     0.589    270.7
2029.0     0.611    284.5
2030.0     0.649    297.0
2031.0     0.703    307.8
2032.0     0.767    317.0
2033.0     0.837    324.7
2034.0     0.910    331.2
2035.0     0.984    336.7
2036.0     1.057    341.5
2037.0     1.128    345.6
2038.0     1.196    349.2
2039.0     1.259    352.5
2040.0     1.318    355.5
2041.0     1.372    358.2
2042.0     1.421      0.8
2043.0     1.464      3.1
2044.0     1.500      5.4
2045.0     1.531      7.5
2046.0     1.554      9.6

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.