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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:44:32

Orbital Elements for MLR520

WDS:	MLR520	WDS ID/Discoverer
P:	50.354	Orbital period (years)
a:	0.1073	Semi-major axis (arcseconds)
i:	143.1	Inclination (degrees)
Ω:	66.2	Longitude of ascending node (degrees)
T:	2002.824	Epoch of periastron passage (year)
e:	0.53	Eccentricity
ω:	239.5	Longitude of periastron (degrees)
Start-Year:	2000.0	Year
End-Year:	2050.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MLR520

Position:	025512.64+594945.6	Epoch-2000 right ascension and declination
WDS-ID:	02552+5950	WDS designation
Discoverer Code:	MLR520	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	17911	HD catalog number
Hipparcos number:	13597	Hipparcos catalog number
V1:	8.76	Magnitude of the primary
V2:	8.87	Magnitude of the secondary
Equinox:		Equinox
Date:	2011	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for MLR520

WDS 6th Orbit including measures of MLR520

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

Ephemeris of MLR520

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.143     20.9
-------------------------
2000.0     0.063    251.3
2001.0     0.056    235.6
2002.0     0.048    214.9
2003.0     0.042    187.2
2004.0     0.042    155.4
2005.0     0.049    128.0
2006.0     0.059    108.6
2007.0     0.070     95.1
2008.0     0.080     85.1
2009.0     0.090     77.4
2010.0     0.099     71.1
2011.0     0.106     65.8
2012.0     0.113     61.1
2013.0     0.119     57.0
2014.0     0.124     53.2
2015.0     0.128     49.7
2016.0     0.132     46.4
2017.0     0.135     43.2
2018.0     0.138     40.2
2019.0     0.140     37.3
2020.0     0.141     34.5
2021.0     0.142     31.7
2022.0     0.143     29.0
2023.0     0.144     26.3
2024.0     0.144     23.6
2025.0     0.143     20.9
2026.0     0.143     18.1
2027.0     0.142     15.4
2028.0     0.140     12.6
2029.0     0.139      9.7
2030.0     0.137      6.8
2031.0     0.135      3.8
2032.0     0.133      0.7
2033.0     0.131    357.5
2034.0     0.128    354.1
2035.0     0.125    350.7
2036.0     0.122    347.0
2037.0     0.119    343.2
2038.0     0.116    339.1
2039.0     0.113    334.9
2040.0     0.109    330.3
2041.0     0.105    325.5
2042.0     0.102    320.3
2043.0     0.098    314.7
2044.0     0.094    308.6
2045.0     0.090    302.0
2046.0     0.086    294.8
2047.0     0.082    286.9
2048.0     0.077    278.0
2049.0     0.072    267.9

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.