Double Star Calculator - Orbit

Orbital Elements for A1999

WDS:	A1999	WDS ID/Discoverer
P:	200.010	Orbital period (years)
a:	0.983	Semi-major axis (arcseconds)
i:	58.0	Inclination (degrees)
Ω:	198.1	Longitude of ascending node (degrees)
T:	2014.080	Epoch of periastron passage (year)
e:	0.589	Eccentricity
ω:	279.4	Longitude of periastron (degrees)
Start-Year:	1924.995	Year
End-Year:	2125.005	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1999
Position:	121526.22+400741.1	Epoch-2000 right ascension and declination
WDS-ID:	12154+4008	WDS designation
Discoverer Code:	A1999	Discover designation and components
ADS number:	8480	Aitken Double Star catalog
HD number:	106592	HD catalog number
Hipparcos number:	59776	Hipparcos catalog number
V1:	9.09	Magnitude of the primary
V2:	11.33	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	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:	FMR2013d	Reference

Double Star Orbit for A1999

WDS 6th Orbit including measures of A1999

-- 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 A1999

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.589   198.39
--------------------------
1924.99    0.894   316.09
1925.99    0.898   317.01
1926.99    0.902   317.93
1927.99    0.906   318.85
1928.99    0.909   319.75
1929.99    0.913   320.65
1930.99    0.917   321.54
1931.99    0.920   322.42
1932.99    0.924   323.30
1933.99    0.928   324.16
1934.99    0.931   325.03
1935.99    0.935   325.88
1936.99    0.938   326.73
1937.99    0.942   327.57
1938.99    0.945   328.41
1939.99    0.948   329.24
1940.99    0.952   330.07
1941.99    0.955   330.89
1942.99    0.958   331.70
1943.99    0.961   332.51
1944.99    0.964   333.32
1945.99    0.966   334.12
1946.99    0.969   334.91
1947.99    0.972   335.70
1948.99    0.974   336.49
1949.99    0.976   337.27
1950.99    0.978   338.05
1951.99    0.980   338.83
1952.99    0.982   339.60
1953.99    0.984   340.37
1954.99    0.985   341.14
1955.99    0.987   341.91
1956.99    0.988   342.67
1957.99    0.989   343.43
1958.99    0.989   344.20
1959.99    0.990   344.96
1960.99    0.990   345.72
1961.99    0.990   346.48
1962.99    0.990   347.24
1963.99    0.989   348.00
1964.99    0.988   348.76
1965.99    0.987   349.52
1966.99    0.986   350.29
1967.99    0.984   351.06
1968.99    0.982   351.83
1969.99    0.979   352.60
1970.99    0.977   353.38
1971.99    0.973   354.16
1972.99    0.970   354.95
1973.99    0.966   355.75
1974.99    0.961   356.55
1975.99    0.957   357.36
1976.99    0.951   358.18
1977.99    0.945   359.01
1978.99    0.939   359.85
1979.99    0.932     0.70
1980.99    0.924     1.56
1981.99    0.916     2.44
1982.99    0.907     3.34
1983.99    0.898     4.25
1984.99    0.888     5.19
1985.99    0.877     6.14
1986.99    0.865     7.12
1987.99    0.852     8.13
1988.99    0.839     9.18
1989.99    0.825    10.25
1990.99    0.809    11.37
1991.99    0.793    12.53
1992.99    0.775    13.74
1993.99    0.757    15.01
1994.99    0.737    16.35
1995.99    0.715    17.76
1996.99    0.693    19.26
1997.99    0.669    20.87
1998.99    0.643    22.60
1999.99    0.616    24.48
2000.99    0.587    26.53
2001.99    0.557    28.81
2002.99    0.525    31.35
2003.99    0.491    34.24
2004.99    0.456    37.56
2005.99    0.419    41.46
2006.99    0.382    46.11
2007.99    0.344    51.77
2008.99    0.307    58.81
2009.99    0.273    67.70
2010.99    0.244    78.90
2011.99    0.224    92.63
2012.99    0.215   108.27
2013.99    0.220   124.15
2014.99    0.238   138.48
2015.99    0.265   150.38
2016.99    0.297   159.88
2017.99    0.332   167.43
2018.99    0.368   173.53
2019.99    0.403   178.54
2020.99    0.437   182.77
2021.99    0.469   186.40
2022.99    0.499   189.57
2023.99    0.527   192.40
2024.99    0.553   194.95
2025.99    0.577   197.28
2026.99    0.599   199.43
2027.99    0.619   201.44
2028.99    0.638   203.32
2029.99    0.655   205.10
2030.99    0.670   206.80
2031.99    0.684   208.43
2032.99    0.697   209.99
2033.99    0.709   211.50
2034.99    0.719   212.96
2035.99    0.729   214.38
2036.99    0.737   215.76
2037.99    0.745   217.12
2038.99    0.752   218.45
2039.99    0.759   219.75
2040.99    0.764   221.04
2041.99    0.770   222.30
2042.99    0.774   223.55
2043.99    0.778   224.79
2044.99    0.782   226.01
2045.99    0.785   227.23
2046.99    0.788   228.43
2047.99    0.790   229.63
2048.99    0.792   230.82
2049.99    0.794   232.00
2050.99    0.795   233.18
2051.99    0.797   234.36
2052.99    0.798   235.53
2053.99    0.798   236.70
2054.99    0.799   237.87
2055.99    0.799   239.03
2056.99    0.800   240.20
2057.99    0.800   241.36
2058.99    0.800   242.53
2059.99    0.800   243.69
2060.99    0.799   244.86
2061.99    0.799   246.02
2062.99    0.799   247.19
2063.99    0.799   248.36
2064.99    0.798   249.53
2065.99    0.798   250.70
2066.99    0.797   251.87
2067.99    0.797   253.04
2068.99    0.796   254.21
2069.99    0.796   255.39
2070.99    0.796   256.56
2071.99    0.795   257.74
2072.99    0.795   258.92
2073.99    0.795   260.10
2074.99    0.794   261.28
2075.99    0.794   262.46
2076.99    0.794   263.64
2077.99    0.794   264.82
2078.99    0.794   266.01
2079.99    0.794   267.19
2080.99    0.794   268.37
2081.99    0.794   269.55
2082.99    0.795   270.73
2083.99    0.795   271.91
2084.99    0.796   273.09
2085.99    0.796   274.26
2086.99    0.797   275.43
2087.99    0.798   276.61
2088.99    0.799   277.77
2089.99    0.800   278.94
2090.99    0.801   280.10
2091.99    0.802   281.26
2092.99    0.804   282.42
2093.99    0.805   283.57
2094.99    0.807   284.71
2095.99    0.808   285.85
2096.99    0.810   286.99
2097.99    0.812   288.12
2098.99    0.814   289.25
2099.99    0.816   290.37
2100.99    0.818   291.49
2101.99    0.821   292.59
2102.99    0.823   293.70
2103.99    0.826   294.79
2104.99    0.828   295.88
2105.99    0.831   296.96
2106.99    0.834   298.04
2107.99    0.837   299.11
2108.99    0.839   300.17
2109.99    0.842   301.22
2110.99    0.846   302.27
2111.99    0.849   303.31
2112.99    0.852   304.34
2113.99    0.855   305.36
2114.99    0.859   306.37
2115.99    0.862   307.38
2116.99    0.865   308.38
2117.99    0.869   309.37
2118.99    0.872   310.35
2119.99    0.876   311.32
2120.99    0.880   312.29
2121.99    0.883   313.25
2122.99    0.887   314.20
2123.99    0.891   315.14
2124.99    0.894   316.08

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 16:44:38