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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:25:49

Orbital Elements for MLR87AB

WDS:	MLR87AB	WDS ID/Discoverer
P:	55.970	Orbital period (years)
a:	0.238	Semi-major axis (arcseconds)
i:	145.1	Inclination (degrees)
Ω:	139.7	Longitude of ascending node (degrees)
T:	2020.450	Epoch of periastron passage (year)
e:	0.513	Eccentricity
ω:	246.4	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MLR87AB

Position:	010337.18+634116.0	Epoch-2000 right ascension and declination
WDS-ID:	01036+6341	WDS designation
Discoverer Code:	MLR87AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	6129	HD catalog number
Hipparcos number:	4963	Hipparcos catalog number
V1:	8.68	Magnitude of the primary
V2:	9.51	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2003	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for MLR87AB

WDS 6th Orbit including measures of MLR87AB

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

Ephemeris of MLR87AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.156    166.3
-------------------------
1998.0     0.289     61.8
1999.0     0.285     58.7
2000.0     0.280     55.5
2001.0     0.275     52.2
2002.0     0.270     48.7
2003.0     0.264     45.1
2004.0     0.259     41.4
2005.0     0.253     37.4
2006.0     0.247     33.3
2007.0     0.240     29.0
2008.0     0.233     24.4
2009.0     0.226     19.5
2010.0     0.219     14.4
2011.0     0.211      8.8
2012.0     0.202      2.8
2013.0     0.193    356.3
2014.0     0.184    349.0
2015.0     0.173    341.0
2016.0     0.161    331.7
2017.0     0.147    320.9
2018.0     0.132    307.7
2019.0     0.116    290.9
2020.0     0.103    269.2
2021.0     0.097    242.9
2022.0     0.102    216.4
2023.0     0.117    194.6
2024.0     0.136    178.4
2025.0     0.156    166.3
2026.0     0.176    157.0
2027.0     0.194    149.5
2028.0     0.211    143.3
2029.0     0.226    137.9
2030.0     0.239    133.2
2031.0     0.251    128.9
2032.0     0.261    125.0
2033.0     0.270    121.3
2034.0     0.279    117.9
2035.0     0.285    114.7
2036.0     0.292    111.6
2037.0     0.297    108.7
2038.0     0.301    105.8
2039.0     0.304    103.0
2040.0     0.307    100.3
2041.0     0.309     97.6
2042.0     0.311     94.9
2043.0     0.311     92.2
2044.0     0.312     89.6
2045.0     0.311     86.9
2046.0     0.311     84.3
2047.0     0.309     81.6
2048.0     0.308     78.9
2049.0     0.305     76.2
2050.0     0.303     73.4
2051.0     0.300     70.6

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.