Double Star Calculator - Orbit

Orbital Elements for A1813AB,C

WDS:	A1813AB,C	WDS ID/Discoverer
P:	234.689	Orbital period (years)
a:	1.40294	Semi-major axis (arcseconds)
i:	118.095	Inclination (degrees)
Ω:	173.071	Longitude of ascending node (degrees)
T:	1895.749	Epoch of periastron passage (year)
e:	0.52293	Eccentricity
ω:	131.547	Longitude of periastron (degrees)
Start-Year:	1907.65535	Year
End-Year:	2142.34465	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1813AB,C
Position:	020212.83+364301.6	Epoch-2000 right ascension and declination
WDS-ID:	02022+3643	WDS designation
Discoverer Code:	A1813AB,C	Discover designation and components
ADS number:	1613	Aitken Double Star catalog
HD number:	12376	HD catalog number
Hipparcos number:	9500	Hipparcos catalog number
V1:	8.29	Magnitude of the primary
V2:	11.19	Magnitude of the secondary
Equinox:		Equinox
Date:	2009	Date of last observation
Orbit grade:	5	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Izm2019	Reference

Double Star Orbit for A1813AB,C

WDS 6th Orbit including measures of A1813AB,C

-- 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 A1813AB,C

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.728   195.23
--------------------------
1907.66    0.795   347.60
1908.66    0.805   345.71
1909.66    0.813   343.86
1910.66    0.820   342.04
1911.66    0.824   340.25
1912.66    0.827   338.47
1913.66    0.829   336.70
1914.66    0.830   334.94
1915.66    0.829   333.18
1916.66    0.828   331.41
1917.66    0.826   329.64
1918.66    0.823   327.86
1919.66    0.819   326.06
1920.66    0.815   324.24
1921.66    0.811   322.41
1922.66    0.806   320.55
1923.66    0.801   318.68
1924.66    0.796   316.77
1925.66    0.791   314.85
1926.66    0.786   312.90
1927.66    0.781   310.92
1928.66    0.776   308.92
1929.66    0.771   306.89
1930.66    0.767   304.84
1931.66    0.763   302.77
1932.66    0.759   300.68
1933.66    0.756   298.57
1934.66    0.753   296.44
1935.66    0.751   294.29
1936.66    0.749   292.14
1937.66    0.748   289.98
1938.66    0.747   287.81
1939.66    0.747   285.64
1940.66    0.748   283.47
1941.66    0.749   281.31
1942.66    0.751   279.15
1943.66    0.754   277.02
1944.66    0.757   274.89
1945.66    0.761   272.79
1946.66    0.766   270.71
1947.66    0.771   268.66
1948.66    0.777   266.63
1949.66    0.783   264.64
1950.66    0.790   262.68
1951.66    0.798   260.76
1952.66    0.806   258.87
1953.66    0.815   257.03
1954.66    0.824   255.22
1955.66    0.833   253.45
1956.66    0.844   251.73
1957.66    0.854   250.05
1958.66    0.865   248.41
1959.66    0.877   246.81
1960.66    0.888   245.25
1961.66    0.901   243.74
1962.66    0.913   242.27
1963.66    0.926   240.83
1964.66    0.939   239.44
1965.66    0.952   238.08
1966.66    0.966   236.76
1967.66    0.979   235.48
1968.66    0.993   234.23
1969.66    1.007   233.02
1970.66    1.021   231.84
1971.66    1.036   230.70
1972.66    1.050   229.58
1973.66    1.065   228.50
1974.66    1.080   227.45
1975.66    1.094   226.42
1976.66    1.109   225.42
1977.66    1.124   224.45
1978.66    1.139   223.50
1979.66    1.154   222.58
1980.66    1.169   221.68
1981.66    1.184   220.81
1982.66    1.199   219.95
1983.66    1.214   219.12
1984.66    1.228   218.31
1985.66    1.243   217.51
1986.66    1.258   216.74
1987.66    1.273   215.98
1988.66    1.287   215.24
1989.66    1.302   214.52
1990.66    1.316   213.81
1991.66    1.331   213.12
1992.66    1.345   212.44
1993.66    1.359   211.78
1994.66    1.373   211.13
1995.66    1.387   210.50
1996.66    1.401   209.87
1997.66    1.415   209.26
1998.66    1.428   208.66
1999.66    1.442   208.07
2000.66    1.455   207.49
2001.66    1.468   206.93
2002.66    1.481   206.37
2003.66    1.494   205.82
2004.66    1.506   205.28
2005.66    1.519   204.75
2006.66    1.531   204.23
2007.66    1.543   203.72
2008.66    1.555   203.21
2009.66    1.566   202.72
2010.66    1.578   202.22
2011.66    1.589   201.74
2012.66    1.600   201.26
2013.66    1.611   200.79
2014.66    1.621   200.33
2015.66    1.632   199.87
2016.66    1.642   199.42
2017.66    1.652   198.97
2018.66    1.661   198.53
2019.66    1.671   198.09
2020.66    1.680   197.66
2021.66    1.689   197.24
2022.66    1.698   196.81
2023.66    1.706   196.39
2024.66    1.714   195.98
2025.66    1.722   195.57
2026.66    1.730   195.16
2027.66    1.737   194.76
2028.66    1.744   194.36
2029.66    1.751   193.96
2030.66    1.757   193.57
2031.66    1.763   193.18
2032.66    1.769   192.79
2033.66    1.775   192.40
2034.66    1.780   192.02
2035.66    1.785   191.64
2036.66    1.790   191.26
2037.66    1.794   190.88
2038.66    1.798   190.51
2039.66    1.802   190.13
2040.66    1.805   189.76
2041.66    1.808   189.39
2042.66    1.811   189.02
2043.66    1.813   188.65
2044.66    1.815   188.28
2045.66    1.817   187.91
2046.66    1.818   187.55
2047.66    1.819   187.18
2048.66    1.819   186.81
2049.66    1.820   186.45
2050.66    1.819   186.08
2051.66    1.819   185.71
2052.66    1.818   185.35
2053.66    1.816   184.98
2054.66    1.814   184.61
2055.66    1.812   184.24
2056.66    1.809   183.87
2057.66    1.806   183.50
2058.66    1.802   183.13
2059.66    1.798   182.76
2060.66    1.794   182.38
2061.66    1.789   182.00
2062.66    1.784   181.62
2063.66    1.778   181.24
2064.66    1.771   180.86
2065.66    1.764   180.47
2066.66    1.757   180.08
2067.66    1.749   179.68
2068.66    1.741   179.29
2069.66    1.732   178.88
2070.66    1.722   178.48
2071.66    1.712   178.07
2072.66    1.702   177.65
2073.66    1.690   177.23
2074.66    1.679   176.80
2075.66    1.666   176.37
2076.66    1.653   175.93
2077.66    1.640   175.48
2078.66    1.626   175.03
2079.66    1.611   174.56
2080.66    1.595   174.09
2081.66    1.579   173.61
2082.66    1.562   173.12
2083.66    1.545   172.62
2084.66    1.526   172.10
2085.66    1.508   171.58
2086.66    1.488   171.04
2087.66    1.467   170.48
2088.66    1.446   169.91
2089.66    1.424   169.32
2090.66    1.401   168.72
2091.66    1.378   168.09
2092.66    1.353   167.44
2093.66    1.328   166.76
2094.66    1.302   166.06
2095.66    1.275   165.33
2096.66    1.247   164.57
2097.66    1.218   163.77
2098.66    1.188   162.94
2099.66    1.158   162.06
2100.66    1.126   161.13
2101.66    1.093   160.14
2102.66    1.060   159.10
2103.66    1.025   157.98
2104.66    0.990   156.79
2105.66    0.954   155.50
2106.66    0.916   154.12
2107.66    0.878   152.61
2108.66    0.839   150.97
2109.66    0.799   149.16
2110.66    0.759   147.16
2111.66    0.718   144.94
2112.66    0.676   142.44
2113.66    0.635   139.61
2114.66    0.593   136.39
2115.66    0.552   132.69
2116.66    0.512   128.40
2117.66    0.474   123.39
2118.66    0.438   117.54
2119.66    0.406   110.70
2120.66    0.379   102.79
2121.66    0.358    93.82
2122.66    0.346    83.99
2123.66    0.342    73.70
2124.66    0.348    63.49
2125.66    0.363    53.85
2126.66    0.384    45.13
2127.66    0.411    37.45
2128.66    0.442    30.78
2129.66    0.476    25.02
2130.66    0.510    20.03
2131.66    0.545    15.67
2132.66    0.578    11.82
2133.66    0.610     8.39
2134.66    0.641     5.29
2135.66    0.669     2.47
2136.66    0.695   359.86
2137.66    0.718   357.44
2138.66    0.739   355.15
2139.66    0.757   352.99
2140.66    0.773   350.92
2141.66    0.787   348.93

Disclaimer

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 14:56:24