Double Star Calculator - Orbit

Orbital Elements for A2289AB

WDS:	A2289AB	WDS ID/Discoverer
P:	159.450	Orbital period (years)
a:	0.207	Semi-major axis (arcseconds)
i:	111.0	Inclination (degrees)
Ω:	141.1	Longitude of ascending node (degrees)
T:	2008.150	Epoch of periastron passage (year)
e:	0.652	Eccentricity
ω:	51.1	Longitude of periastron (degrees)
Start-Year:	1945.275	Year
End-Year:	2104.725	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2289AB
Position:	212530.78+020235.0	Epoch-2000 right ascension and declination
WDS-ID:	21255+0203	WDS designation
Discoverer Code:	A2289AB	Discover designation and components
ADS number:	14960	Aitken Double Star catalog
HD number:	203993	HD catalog number
Hipparcos number:	105792	Hipparcos catalog number
V1:	7.82	Magnitude of the primary
V2:	9.27	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2015c	Reference

Double Star Orbit for A2289AB

WDS 6th Orbit including measures of A2289AB

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

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of A2289AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.177   323.99
--------------------------
1945.28    0.188   287.23
1946.28    0.185   286.47
1947.28    0.181   285.68
1948.28    0.178   284.87
1949.28    0.175   284.02
1950.28    0.171   283.14
1951.28    0.168   282.23
1952.28    0.164   281.28
1953.28    0.161   280.28
1954.28    0.157   279.25
1955.28    0.154   278.16
1956.28    0.151   277.03
1957.28    0.147   275.84
1958.28    0.144   274.60
1959.28    0.140   273.29
1960.28    0.137   271.91
1961.28    0.133   270.47
1962.28    0.130   268.94
1963.28    0.126   267.33
1964.28    0.123   265.64
1965.28    0.119   263.85
1966.28    0.116   261.95
1967.28    0.113   259.95
1968.28    0.110   257.83
1969.28    0.107   255.59
1970.28    0.104   253.21
1971.28    0.101   250.70
1972.28    0.098   248.05
1973.28    0.096   245.26
1974.28    0.093   242.31
1975.28    0.091   239.22
1976.28    0.089   235.97
1977.28    0.087   232.59
1978.28    0.086   229.08
1979.28    0.084   225.44
1980.28    0.083   221.70
1981.28    0.083   217.88
1982.28    0.082   214.00
1983.28    0.082   210.08
1984.28    0.082   206.15
1985.28    0.082   202.24
1986.28    0.083   198.37
1987.28    0.083   194.56
1988.28    0.084   190.83
1989.28    0.086   187.19
1990.28    0.087   183.65
1991.28    0.088   180.22
1992.28    0.090   176.90
1993.28    0.091   173.69
1994.28    0.093   170.57
1995.28    0.094   167.55
1996.28    0.095   164.60
1997.28    0.096   161.72
1998.28    0.096   158.87
1999.28    0.096   156.04
2000.28    0.096   153.20
2001.28    0.094   150.29
2002.28    0.092   147.27
2003.28    0.088   144.05
2004.28    0.084   140.50
2005.28    0.077   136.43
2006.28    0.069   131.48
2007.28    0.059   125.02
2008.28    0.048   115.77
2009.28    0.038   101.14
2010.28    0.030    77.01
2011.28    0.029    44.76
2012.28    0.035    18.06
2013.28    0.046     1.77
2014.28    0.058   351.95
2015.28    0.071   345.56
2016.28    0.083   341.07
2017.28    0.094   337.71
2018.28    0.106   335.08
2019.28    0.116   332.94
2020.28    0.126   331.15
2021.28    0.136   329.62
2022.28    0.145   328.28
2023.28    0.153   327.10
2024.28    0.161   326.03
2025.28    0.169   325.07
2026.28    0.176   324.18
2027.28    0.183   323.36
2028.28    0.189   322.60
2029.28    0.195   321.88
2030.28    0.201   321.21
2031.28    0.206   320.58
2032.28    0.211   319.97
2033.28    0.216   319.39
2034.28    0.220   318.84
2035.28    0.224   318.31
2036.28    0.228   317.80
2037.28    0.232   317.30
2038.28    0.236   316.82
2039.28    0.239   316.35
2040.28    0.242   315.90
2041.28    0.245   315.46
2042.28    0.248   315.02
2043.28    0.250   314.60
2044.28    0.253   314.18
2045.28    0.255   313.78
2046.28    0.257   313.37
2047.28    0.259   312.98
2048.28    0.260   312.59
2049.28    0.262   312.20
2050.28    0.263   311.82
2051.28    0.264   311.44
2052.28    0.265   311.07
2053.28    0.266   310.70
2054.28    0.267   310.33
2055.28    0.268   309.96
2056.28    0.268   309.59
2057.28    0.269   309.23
2058.28    0.269   308.87
2059.28    0.269   308.50
2060.28    0.269   308.14
2061.28    0.269   307.78
2062.28    0.269   307.42
2063.28    0.269   307.06
2064.28    0.269   306.69
2065.28    0.268   306.33
2066.28    0.268   305.96
2067.28    0.267   305.59
2068.28    0.266   305.22
2069.28    0.266   304.85
2070.28    0.265   304.48
2071.28    0.264   304.10
2072.28    0.262   303.72
2073.28    0.261   303.34
2074.28    0.260   302.95
2075.28    0.259   302.56
2076.28    0.257   302.17
2077.28    0.256   301.77
2078.28    0.254   301.36
2079.28    0.252   300.95
2080.28    0.251   300.54
2081.28    0.249   300.11
2082.28    0.247   299.69
2083.28    0.245   299.25
2084.28    0.243   298.81
2085.28    0.241   298.36
2086.28    0.239   297.90
2087.28    0.236   297.44
2088.28    0.234   296.96
2089.28    0.232   296.48
2090.28    0.229   295.98
2091.28    0.227   295.48
2092.28    0.224   294.96
2093.28    0.222   294.43
2094.28    0.219   293.89
2095.28    0.216   293.33
2096.28    0.213   292.76
2097.28    0.210   292.18
2098.28    0.208   291.57
2099.28    0.205   290.95
2100.28    0.202   290.32
2101.28    0.199   289.66
2102.28    0.195   288.98
2103.28    0.192   288.29
2104.28    0.189   287.56

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This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 18:26:20