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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:44:53

Orbital Elements for A2100

WDS:	A2100	WDS ID/Discoverer
P:	89.330	Orbital period (years)
a:	0.27	Semi-major axis (arcseconds)
i:	159.0	Inclination (degrees)
Ω:	111.5	Longitude of ascending node (degrees)
T:	1990.750	Epoch of periastron passage (year)
e:	0.761	Eccentricity
ω:	54.9	Longitude of periastron (degrees)
Start-Year:	1981.0	Year
End-Year:	2069.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2100

Position:	235647.29+044330.4	Epoch-2000 right ascension and declination
WDS-ID:	23568+0444	WDS designation
Discoverer Code:	A2100	Discover designation and components
ADS number:	17111	Aitken Double Star catalog
HD number:	224315	HD catalog number
Hipparcos number:	118054	Hipparcos catalog number
V1:	7.4	Magnitude of the primary
V2:	7.9	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2100

WDS 6th Orbit including measures of A2100

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

Ephemeris of A2100

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.442    247.6
-------------------------
1981.0     0.228    190.3
1982.0     0.213    186.6
1983.0     0.197    182.4
1984.0     0.181    177.4
1985.0     0.163    171.4
1986.0     0.145    163.9
1987.0     0.126    154.1
1988.0     0.106    140.7
1989.0     0.086    121.1
1990.0     0.069     90.7
1991.0     0.061     46.7
1992.0     0.072      4.8
1993.0     0.093    338.0
1994.0     0.117    321.6
1995.0     0.140    310.7
1996.0     0.161    302.8
1997.0     0.182    296.7
1998.0     0.201    291.9
1999.0     0.218    287.8
2000.0     0.235    284.3
2001.0     0.251    281.3
2002.0     0.265    278.6
2003.0     0.279    276.2
2004.0     0.292    274.0
2005.0     0.304    272.0
2006.0     0.316    270.2
2007.0     0.327    268.5
2008.0     0.337    266.9
2009.0     0.347    265.3
2010.0     0.356    263.9
2011.0     0.365    262.5
2012.0     0.373    261.2
2013.0     0.381    260.0
2014.0     0.388    258.8
2015.0     0.395    257.6
2016.0     0.402    256.5
2017.0     0.408    255.4
2018.0     0.413    254.3
2019.0     0.418    253.3
2020.0     0.423    252.3
2021.0     0.428    251.3
2022.0     0.432    250.4
2023.0     0.436    249.4
2024.0     0.439    248.5
2025.0     0.442    247.6
2026.0     0.445    246.7
2027.0     0.447    245.8
2028.0     0.449    244.9
2029.0     0.451    244.0
2030.0     0.452    243.1
2031.0     0.453    242.3
2032.0     0.454    241.4
2033.0     0.455    240.6
2034.0     0.455    239.7
2035.0     0.455    238.8
2036.0     0.454    238.0
2037.0     0.453    237.1
2038.0     0.452    236.2
2039.0     0.451    235.4
2040.0     0.449    234.5
2041.0     0.447    233.6
2042.0     0.445    232.7
2043.0     0.442    231.8
2044.0     0.439    230.9
2045.0     0.436    230.0
2046.0     0.433    229.0
2047.0     0.429    228.1
2048.0     0.424    227.1
2049.0     0.420    226.1
2050.0     0.415    225.1
2051.0     0.410    224.0
2052.0     0.404    222.9
2053.0     0.398    221.8
2054.0     0.392    220.7
2055.0     0.385    219.5
2056.0     0.378    218.3
2057.0     0.371    217.0
2058.0     0.363    215.7
2059.0     0.355    214.3
2060.0     0.346    212.9
2061.0     0.337    211.3
2062.0     0.327    209.7
2063.0     0.317    208.0
2064.0     0.307    206.2
2065.0     0.296    204.2
2066.0     0.284    202.1
2067.0     0.272    199.8
2068.0     0.260    197.3

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.