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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:27:55

Orbital Elements for A218

WDS:	A218	WDS ID/Discoverer
P:	85.000	Orbital period (years)
a:	0.298	Semi-major axis (arcseconds)
i:	106.0	Inclination (degrees)
Ω:	24.2	Longitude of ascending node (degrees)
T:	1934.000	Epoch of periastron passage (year)
e:	0.74	Eccentricity
ω:	96.0	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 A218

Position:	064147.48+304102.7	Epoch-2000 right ascension and declination
WDS-ID:	06418+3041	WDS designation
Discoverer Code:	A218	Discover designation and components
ADS number:	5332	Aitken Double Star catalog
HD number:	47812	HD catalog number
Hipparcos number:	32050	Hipparcos catalog number
V1:	9.29	Magnitude of the primary
V2:	9.32	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A218

WDS 6th Orbit including measures of A218

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

Ephemeris of A218

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.171    194.5
-------------------------
1983.0     0.175     76.1
1984.0     0.179     73.9
1985.0     0.183     71.8
1986.0     0.187     69.7
1987.0     0.191     67.7
1988.0     0.195     65.9
1989.0     0.199     64.1
1990.0     0.203     62.3
1991.0     0.207     60.7
1992.0     0.210     59.1
1993.0     0.214     57.5
1994.0     0.218     56.0
1995.0     0.221     54.6
1996.0     0.224     53.2
1997.0     0.227     51.8
1998.0     0.229     50.5
1999.0     0.232     49.1
2000.0     0.233     47.9
2001.0     0.235     46.6
2002.0     0.236     45.3
2003.0     0.236     44.1
2004.0     0.236     42.8
2005.0     0.235     41.6
2006.0     0.234     40.3
2007.0     0.231     39.0
2008.0     0.228     37.7
2009.0     0.224     36.3
2010.0     0.218     34.9
2011.0     0.210     33.4
2012.0     0.200     31.7
2013.0     0.188     29.9
2014.0     0.173     27.7
2015.0     0.153     25.1
2016.0     0.127     21.5
2017.0     0.094     15.8
2018.0     0.051      1.5
2019.0     0.023    273.3
2020.0     0.063    219.4
2021.0     0.101    208.8
2022.0     0.129    203.5
2023.0     0.148    199.9
2024.0     0.162    197.0
2025.0     0.171    194.5
2026.0     0.178    192.2
2027.0     0.183    190.1
2028.0     0.186    188.0
2029.0     0.188    186.1
2030.0     0.188    184.1
2031.0     0.188    182.1
2032.0     0.187    180.1
2033.0     0.186    178.1
2034.0     0.184    176.1
2035.0     0.181    174.0
2036.0     0.179    171.8
2037.0     0.176    169.6
2038.0     0.173    167.3
2039.0     0.170    165.0
2040.0     0.167    162.5
2041.0     0.164    160.0
2042.0     0.161    157.3
2043.0     0.158    154.6
2044.0     0.155    151.7
2045.0     0.152    148.7
2046.0     0.150    145.7
2047.0     0.147    142.5
2048.0     0.145    139.3
2049.0     0.144    135.9
2050.0     0.142    132.5
2051.0     0.141    129.0
2052.0     0.140    125.5
2053.0     0.140    122.0
2054.0     0.140    118.4
2055.0     0.141    114.9
2056.0     0.141    111.4
2057.0     0.143    107.9
2058.0     0.144    104.5
2059.0     0.146    101.2
2060.0     0.148     98.0
2061.0     0.151     94.8
2062.0     0.154     91.8
2063.0     0.157     88.9
2064.0     0.160     86.1
2065.0     0.163     83.5
2066.0     0.167     80.9

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.