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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:32:41

Orbital Elements for A2123AB

WDS:	A2123AB	WDS ID/Discoverer
P:	80.940	Orbital period (years)
a:	0.462	Semi-major axis (arcseconds)
i:	71.4	Inclination (degrees)
Ω:	135.8	Longitude of ascending node (degrees)
T:	1979.510	Epoch of periastron passage (year)
e:	0.89	Eccentricity
ω:	73.4	Longitude of periastron (degrees)
Start-Year:	1985.0	Year
End-Year:	2065.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2123AB

Position:	071706.96-120201.6	Epoch-2000 right ascension and declination
WDS-ID:	07171-1202	WDS designation
Discoverer Code:	A2123AB	Discover designation and components
ADS number:	5956	Aitken Double Star catalog
HD number:	56593	HD catalog number
Hipparcos number:	35261	Hipparcos catalog number
V1:	8.61	Magnitude of the primary
V2:	6.96	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2020	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2123AB

WDS 6th Orbit including measures of A2123AB

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

Ephemeris of A2123AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.337      8.3
-------------------------
1985.0     0.281    329.5
1986.0     0.301    331.2
1987.0     0.318    332.6
1988.0     0.333    333.9
1989.0     0.346    335.1
1990.0     0.357    336.2
1991.0     0.366    337.3
1992.0     0.375    338.3
1993.0     0.382    339.2
1994.0     0.389    340.2
1995.0     0.394    341.1
1996.0     0.399    341.9
1997.0     0.402    342.8
1998.0     0.406    343.7
1999.0     0.408    344.5
2000.0     0.410    345.3
2001.0     0.412    346.1
2002.0     0.412    346.9
2003.0     0.413    347.8
2004.0     0.413    348.6
2005.0     0.412    349.4
2006.0     0.411    350.2
2007.0     0.410    351.0
2008.0     0.408    351.8
2009.0     0.406    352.7
2010.0     0.404    353.5
2011.0     0.401    354.4
2012.0     0.398    355.2
2013.0     0.395    356.1
2014.0     0.392    357.0
2015.0     0.388    357.9
2016.0     0.384    358.8
2017.0     0.380    359.8
2018.0     0.375      0.7
2019.0     0.370      1.7
2020.0     0.365      2.8
2021.0     0.360      3.8
2022.0     0.355      4.9
2023.0     0.349      6.0
2024.0     0.343      7.2
2025.0     0.337      8.3
2026.0     0.331      9.6
2027.0     0.325     10.9
2028.0     0.319     12.2
2029.0     0.312     13.6
2030.0     0.306     15.0
2031.0     0.299     16.5
2032.0     0.292     18.1
2033.0     0.285     19.8
2034.0     0.278     21.5
2035.0     0.271     23.4
2036.0     0.264     25.3
2037.0     0.257     27.3
2038.0     0.250     29.5
2039.0     0.243     31.7
2040.0     0.236     34.1
2041.0     0.229     36.7
2042.0     0.222     39.4
2043.0     0.216     42.3
2044.0     0.209     45.3
2045.0     0.203     48.6
2046.0     0.197     52.1
2047.0     0.191     55.7
2048.0     0.185     59.6
2049.0     0.180     63.8
2050.0     0.175     68.1
2051.0     0.171     72.7
2052.0     0.166     77.6
2053.0     0.162     82.7
2054.0     0.158     88.1
2055.0     0.154     93.8
2056.0     0.149     99.9
2057.0     0.142    106.4
2058.0     0.132    113.7
2059.0     0.113    122.9
2060.0     0.066    139.6
2061.0     0.061    302.6
2062.0     0.142    317.3
2063.0     0.192    322.3
2064.0     0.229    325.4

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.