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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:40:25

Orbital Elements for MLR198

WDS:	MLR198	WDS ID/Discoverer
P:	51.160	Orbital period (years)
a:	0.199	Semi-major axis (arcseconds)
i:	135.3	Inclination (degrees)
Ω:	192.7	Longitude of ascending node (degrees)
T:	1993.690	Epoch of periastron passage (year)
e:	0.542	Eccentricity
ω:	322.4	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 MLR198

Position:	164157.22+735314.3	Epoch-2000 right ascension and declination
WDS-ID:	16420+7353	WDS designation
Discoverer Code:	MLR198	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	151746	HD catalog number
Hipparcos number:	81757	Hipparcos catalog number
V1:	7.3	Magnitude of the primary
V2:	7.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for MLR198

WDS 6th Orbit including measures of MLR198

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

Ephemeris of MLR198

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.284     29.5
-------------------------
2000.0     0.127    128.6
2001.0     0.134    118.8
2002.0     0.141    110.0
2003.0     0.150    102.1
2004.0     0.159     95.1
2005.0     0.169     88.9
2006.0     0.179     83.4
2007.0     0.188     78.5
2008.0     0.198     74.0
2009.0     0.207     69.9
2010.0     0.217     66.2
2011.0     0.225     62.8
2012.0     0.234     59.7
2013.0     0.242     56.7
2014.0     0.249     54.0
2015.0     0.256     51.3
2016.0     0.262     48.9
2017.0     0.267     46.5
2018.0     0.272     44.2
2019.0     0.276     42.0
2020.0     0.280     39.8
2021.0     0.282     37.7
2022.0     0.284     35.6
2023.0     0.285     33.6
2024.0     0.285     31.5
2025.0     0.284     29.5
2026.0     0.282     27.4
2027.0     0.280     25.3
2028.0     0.276     23.1
2029.0     0.271     20.9
2030.0     0.265     18.6
2031.0     0.258     16.2
2032.0     0.249     13.6
2033.0     0.240     10.8
2034.0     0.228      7.8
2035.0     0.215      4.4
2036.0     0.201      0.5
2037.0     0.185    356.1
2038.0     0.167    350.7
2039.0     0.147    343.9
2040.0     0.126    334.9
2041.0     0.105    322.3
2042.0     0.085    303.5
2043.0     0.073    276.4
2044.0     0.074    244.9
2045.0     0.084    217.8
2046.0     0.096    197.2
2047.0     0.105    180.7
2048.0     0.111    166.3
2049.0     0.115    153.3

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.