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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:54:55

Orbital Elements for AC5AB

WDS:	AC5AB	WDS ID/Discoverer
P:	77.820	Orbital period (years)
a:	0.397	Semi-major axis (arcseconds)
i:	141.1	Inclination (degrees)
Ω:	194.7	Longitude of ascending node (degrees)
T:	1957.650	Epoch of periastron passage (year)
e:	0.736	Eccentricity
ω:	303.3	Longitude of periastron (degrees)
Start-Year:	1987.0	Year
End-Year:	2063.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for AC5AB

Position:	095230.47-080617.7	Epoch-2000 right ascension and declination
WDS-ID:	09525-0806	WDS designation
Discoverer Code:	AC5AB	Discover designation and components
ADS number:	7555	Aitken Double Star catalog
HD number:	85558	HD catalog number
Hipparcos number:	48437	Hipparcos catalog number
V1:	5.43	Magnitude of the primary
V2:	6.41	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2006	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for AC5AB

WDS 6th Orbit including measures of AC5AB

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

Ephemeris of AC5AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.395     26.1
-------------------------
1987.0     0.539     76.0
1988.0     0.546     74.7
1989.0     0.552     73.4
1990.0     0.559     72.2
1991.0     0.564     71.0
1992.0     0.569     69.8
1993.0     0.574     68.6
1994.0     0.578     67.4
1995.0     0.582     66.3
1996.0     0.585     65.2
1997.0     0.588     64.0
1998.0     0.590     62.9
1999.0     0.592     61.8
2000.0     0.593     60.7
2001.0     0.593     59.6
2002.0     0.593     58.6
2003.0     0.593     57.5
2004.0     0.592     56.4
2005.0     0.590     55.3
2006.0     0.588     54.2
2007.0     0.585     53.0
2008.0     0.582     51.9
2009.0     0.577     50.8
2010.0     0.573     49.6
2011.0     0.567     48.4
2012.0     0.561     47.2
2013.0     0.554     46.0
2014.0     0.546     44.7
2015.0     0.538     43.4
2016.0     0.528     42.1
2017.0     0.518     40.7
2018.0     0.507     39.2
2019.0     0.494     37.7
2020.0     0.481     36.0
2021.0     0.467     34.3
2022.0     0.451     32.5
2023.0     0.434     30.5
2024.0     0.415     28.4
2025.0     0.395     26.1
2026.0     0.373     23.5
2027.0     0.349     20.5
2028.0     0.323     17.1
2029.0     0.294     13.1
2030.0     0.262      8.1
2031.0     0.227      1.7
2032.0     0.189    352.8
2033.0     0.147    338.9
2034.0     0.106    314.0
2035.0     0.085    268.7
2036.0     0.102    221.9
2037.0     0.132    193.2
2038.0     0.158    174.8
2039.0     0.182    161.6
2040.0     0.204    151.2
2041.0     0.224    142.8
2042.0     0.244    135.8
2043.0     0.262    129.8
2044.0     0.280    124.5
2045.0     0.298    119.9
2046.0     0.315    115.8
2047.0     0.331    112.2
2048.0     0.347    108.8
2049.0     0.362    105.8
2050.0     0.377    103.0
2051.0     0.392    100.4
2052.0     0.405     97.9
2053.0     0.419     95.7
2054.0     0.431     93.5
2055.0     0.444     91.5
2056.0     0.456     89.6
2057.0     0.467     87.8
2058.0     0.478     86.1
2059.0     0.488     84.5
2060.0     0.498     82.9
2061.0     0.507     81.4
2062.0     0.516     79.9

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.