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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:18:40

Orbital Elements for MCA66AA,AB

WDS:	MCA66AA,AB	WDS ID/Discoverer
P:	84.200	Orbital period (years)
a:	0.193	Semi-major axis (arcseconds)
i:	122.5	Inclination (degrees)
Ω:	51.8	Longitude of ascending node (degrees)
T:	1985.790	Epoch of periastron passage (year)
e:	0.668	Eccentricity
ω:	183.4	Longitude of periastron (degrees)
Start-Year:	1983.0	Year
End-Year:	2067.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MCA66AA,AB

Position:	210404.71-054923.0	Epoch-2000 right ascension and declination
WDS-ID:	21041-0549	WDS designation
Discoverer Code:	MCA66AA,AB	Discover designation and components
ADS number:	14592	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	103981	Hipparcos catalog number
V1:	5.9	Magnitude of the primary
V2:	8.3	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for MCA66AA,AB

WDS 6th Orbit including measures of MCA66AA,AB

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

Ephemeris of MCA66AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.321     51.8
-------------------------
1983.0     0.056    278.2
1984.0     0.060    258.9
1985.0     0.064    242.2
1986.0     0.064    226.7
1987.0     0.059    209.9
1988.0     0.054    189.8
1989.0     0.051    166.2
1990.0     0.055    143.1
1991.0     0.064    124.6
1992.0     0.076    111.4
1993.0     0.089    102.0
1994.0     0.103     95.1
1995.0     0.117     89.8
1996.0     0.131     85.7
1997.0     0.144     82.3
1998.0     0.157     79.5
1999.0     0.169     77.1
2000.0     0.181     75.0
2001.0     0.192     73.2
2002.0     0.202     71.5
2003.0     0.212     70.0
2004.0     0.222     68.7
2005.0     0.231     67.4
2006.0     0.239     66.3
2007.0     0.247     65.2
2008.0     0.255     64.2
2009.0     0.262     63.2
2010.0     0.268     62.3
2011.0     0.275     61.5
2012.0     0.280     60.6
2013.0     0.286     59.8
2014.0     0.291     59.1
2015.0     0.295     58.3
2016.0     0.300     57.6
2017.0     0.303     56.9
2018.0     0.307     56.2
2019.0     0.310     55.6
2020.0     0.313     54.9
2021.0     0.315     54.3
2022.0     0.317     53.6
2023.0     0.319     53.0
2024.0     0.320     52.4
2025.0     0.321     51.8
2026.0     0.321     51.1
2027.0     0.322     50.5
2028.0     0.321     49.9
2029.0     0.321     49.3
2030.0     0.320     48.7
2031.0     0.319     48.0
2032.0     0.317     47.4
2033.0     0.316     46.8
2034.0     0.313     46.1
2035.0     0.311     45.5
2036.0     0.308     44.8
2037.0     0.305     44.1
2038.0     0.301     43.4
2039.0     0.297     42.7
2040.0     0.292     42.0
2041.0     0.288     41.2
2042.0     0.283     40.5
2043.0     0.277     39.6
2044.0     0.271     38.8
2045.0     0.265     37.9
2046.0     0.258     37.0
2047.0     0.251     36.0
2048.0     0.243     35.0
2049.0     0.235     33.8
2050.0     0.227     32.7
2051.0     0.218     31.4
2052.0     0.209     30.0
2053.0     0.199     28.4
2054.0     0.189     26.8
2055.0     0.178     24.9
2056.0     0.167     22.7
2057.0     0.156     20.3
2058.0     0.144     17.4
2059.0     0.131     14.1
2060.0     0.119     10.0
2061.0     0.106      4.9
2062.0     0.093    358.4
2063.0     0.080    349.8
2064.0     0.069    338.3
2065.0     0.060    322.9
2066.0     0.055    303.5

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.