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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:13:35

Orbital Elements for A2641

WDS:	A2641	WDS ID/Discoverer
P:	91.917	Orbital period (years)
a:	1.143	Semi-major axis (arcseconds)
i:	114.3	Inclination (degrees)
Ω:	166.0	Longitude of ascending node (degrees)
T:	1945.338	Epoch of periastron passage (year)
e:	0.107	Eccentricity
ω:	136.6	Longitude of periastron (degrees)
Start-Year:	1980.0	Year
End-Year:	2070.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2641

Position:	052237.50+023611.4	Epoch-2000 right ascension and declination
WDS-ID:	05226+0236	WDS designation
Discoverer Code:	A2641	Discover designation and components
ADS number:	3959	Aitken Double Star catalog
HD number:	35112	HD catalog number
Hipparcos number:	25119	Hipparcos catalog number
V1:	7.93	Magnitude of the primary
V2:	10.77	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2641

WDS 6th Orbit including measures of A2641

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

Ephemeris of A2641

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.480    102.0
-------------------------
1980.0     0.546    232.5
1981.0     0.575    225.8
1982.0     0.608    219.8
1983.0     0.645    214.5
1984.0     0.685    209.7
1985.0     0.727    205.5
1986.0     0.769    201.8
1987.0     0.812    198.4
1988.0     0.854    195.4
1989.0     0.896    192.7
1990.0     0.937    190.2
1991.0     0.975    187.9
1992.0     1.012    185.8
1993.0     1.047    183.8
1994.0     1.079    182.0
1995.0     1.109    180.2
1996.0     1.135    178.6
1997.0     1.159    177.0
1998.0     1.180    175.4
1999.0     1.197    173.9
2000.0     1.210    172.5
2001.0     1.220    171.1
2002.0     1.227    169.7
2003.0     1.229    168.3
2004.0     1.228    166.9
2005.0     1.223    165.5
2006.0     1.214    164.1
2007.0     1.201    162.7
2008.0     1.184    161.2
2009.0     1.163    159.7
2010.0     1.138    158.1
2011.0     1.110    156.4
2012.0     1.077    154.7
2013.0     1.041    152.8
2014.0     1.002    150.8
2015.0     0.960    148.7
2016.0     0.914    146.3
2017.0     0.866    143.6
2018.0     0.816    140.7
2019.0     0.765    137.3
2020.0     0.713    133.5
2021.0     0.660    129.0
2022.0     0.609    123.8
2023.0     0.561    117.7
2024.0     0.517    110.5
2025.0     0.480    102.0
2026.0     0.452     92.3
2027.0     0.436     81.7
2028.0     0.434     70.5
2029.0     0.445     59.6
2030.0     0.468     49.5
2031.0     0.501     40.6
2032.0     0.542     32.8
2033.0     0.588     26.3
2034.0     0.637     20.7
2035.0     0.687     15.9
2036.0     0.736     11.7
2037.0     0.784      8.1
2038.0     0.829      4.9
2039.0     0.872      2.0
2040.0     0.911    359.4
2041.0     0.945    356.9
2042.0     0.976    354.7
2043.0     1.001    352.5
2044.0     1.021    350.5
2045.0     1.036    348.5
2046.0     1.046    346.6
2047.0     1.051    344.7
2048.0     1.051    342.8
2049.0     1.045    340.9
2050.0     1.035    339.0
2051.0     1.020    337.0
2052.0     1.001    334.9
2053.0     0.978    332.8
2054.0     0.951    330.5
2055.0     0.920    328.1
2056.0     0.887    325.6
2057.0     0.851    322.8
2058.0     0.813    319.8
2059.0     0.774    316.4
2060.0     0.734    312.8
2061.0     0.694    308.6
2062.0     0.655    304.0
2063.0     0.618    298.9
2064.0     0.584    293.1
2065.0     0.554    286.6
2066.0     0.530    279.4
2067.0     0.513    271.7
2068.0     0.503    263.6
2069.0     0.502    255.3

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.