Double Star Calculator - Orbit

Orbital Elements for A2099

WDS:	A2099	WDS ID/Discoverer
P:	256.000	Orbital period (years)
a:	0.604	Semi-major axis (arcseconds)
i:	76.9	Inclination (degrees)
Ω:	348.3	Longitude of ascending node (degrees)
T:	1917.900	Epoch of periastron passage (year)
e:	0.454	Eccentricity
ω:	2.0	Longitude of periastron (degrees)
Start-Year:	1897.0	Year
End-Year:	2153.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2099
Position:	224000.54+011233.6	Epoch-2000 right ascension and declination
WDS-ID:	22400+0113	WDS designation
Discoverer Code:	A2099	Discover designation and components
ADS number:	16157	Aitken Double Star catalog
HD number:	214699	HD catalog number
Hipparcos number:	111900	Hipparcos catalog number
V1:	8.54	Magnitude of the primary
V2:	9.38	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Hrt2010a	Reference

Double Star Orbit for A2099

WDS 6th Orbit including measures of A2099

-- 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 A2099

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.852   166.10
--------------------------
1897.00    0.164   314.47
1898.00    0.175   318.09
1899.00    0.187   321.26
1900.00    0.199   324.05
1901.00    0.211   326.53
1902.00    0.222   328.74
1903.00    0.234   330.73
1904.00    0.245   332.53
1905.00    0.256   334.18
1906.00    0.267   335.70
1907.00    0.277   337.10
1908.00    0.286   338.41
1909.00    0.294   339.64
1910.00    0.302   340.81
1911.00    0.309   341.92
1912.00    0.315   342.98
1913.00    0.320   344.01
1914.00    0.324   345.00
1915.00    0.327   345.98
1916.00    0.329   346.94
1917.00    0.330   347.90
1918.00    0.330   348.85
1919.00    0.328   349.81
1920.00    0.325   350.78
1921.00    0.322   351.77
1922.00    0.317   352.78
1923.00    0.311   353.83
1924.00    0.304   354.92
1925.00    0.297   356.07
1926.00    0.288   357.28
1927.00    0.279   358.57
1928.00    0.269   359.95
1929.00    0.258     1.44
1930.00    0.247     3.06
1931.00    0.236     4.83
1932.00    0.224     6.80
1933.00    0.212     8.99
1934.00    0.199    11.45
1935.00    0.187    14.23
1936.00    0.174    17.41
1937.00    0.162    21.07
1938.00    0.151    25.29
1939.00    0.140    30.20
1940.00    0.130    35.89
1941.00    0.122    42.45
1942.00    0.114    49.92
1943.00    0.109    58.21
1944.00    0.107    67.10
1945.00    0.107    76.23
1946.00    0.109    85.17
1947.00    0.114    93.55
1948.00    0.121   101.11
1949.00    0.129   107.77
1950.00    0.139   113.54
1951.00    0.150   118.50
1952.00    0.162   122.76
1953.00    0.175   126.42
1954.00    0.188   129.59
1955.00    0.201   132.34
1956.00    0.214   134.75
1957.00    0.228   136.87
1958.00    0.242   138.75
1959.00    0.256   140.42
1960.00    0.269   141.93
1961.00    0.283   143.29
1962.00    0.297   144.52
1963.00    0.311   145.64
1964.00    0.325   146.66
1965.00    0.338   147.61
1966.00    0.352   148.48
1967.00    0.365   149.29
1968.00    0.378   150.04
1969.00    0.391   150.74
1970.00    0.404   151.39
1971.00    0.417   152.01
1972.00    0.429   152.59
1973.00    0.442   153.13
1974.00    0.454   153.65
1975.00    0.466   154.14
1976.00    0.478   154.60
1977.00    0.490   155.05
1978.00    0.502   155.47
1979.00    0.513   155.87
1980.00    0.525   156.25
1981.00    0.536   156.62
1982.00    0.547   156.98
1983.00    0.557   157.32
1984.00    0.568   157.64
1985.00    0.578   157.96
1986.00    0.589   158.26
1987.00    0.599   158.56
1988.00    0.608   158.84
1989.00    0.618   159.12
1990.00    0.628   159.38
1991.00    0.637   159.64
1992.00    0.646   159.90
1993.00    0.655   160.14
1994.00    0.664   160.38
1995.00    0.672   160.61
1996.00    0.681   160.84
1997.00    0.689   161.06
1998.00    0.697   161.27
1999.00    0.705   161.48
2000.00    0.713   161.69
2001.00    0.720   161.89
2002.00    0.727   162.09
2003.00    0.735   162.28
2004.00    0.741   162.47
2005.00    0.748   162.66
2006.00    0.755   162.84
2007.00    0.761   163.03
2008.00    0.768   163.20
2009.00    0.774   163.38
2010.00    0.780   163.55
2011.00    0.785   163.72
2012.00    0.791   163.88
2013.00    0.796   164.05
2014.00    0.801   164.21
2015.00    0.806   164.37
2016.00    0.811   164.53
2017.00    0.816   164.69
2018.00    0.821   164.84
2019.00    0.825   164.99
2020.00    0.829   165.15
2021.00    0.833   165.30
2022.00    0.837   165.44
2023.00    0.841   165.59
2024.00    0.844   165.74
2025.00    0.847   165.88
2026.00    0.850   166.03
2027.00    0.853   166.17
2028.00    0.856   166.31
2029.00    0.859   166.45
2030.00    0.861   166.59
2031.00    0.864   166.73
2032.00    0.866   166.87
2033.00    0.868   167.01
2034.00    0.869   167.15
2035.00    0.871   167.28
2036.00    0.872   167.42
2037.00    0.874   167.55
2038.00    0.875   167.69
2039.00    0.876   167.82
2040.00    0.877   167.96
2041.00    0.877   168.09
2042.00    0.878   168.23
2043.00    0.878   168.36
2044.00    0.878   168.50
2045.00    0.878   168.63
2046.00    0.878   168.77
2047.00    0.877   168.90
2048.00    0.877   169.04
2049.00    0.876   169.17
2050.00    0.875   169.31
2051.00    0.874   169.44
2052.00    0.873   169.58
2053.00    0.871   169.71
2054.00    0.870   169.85
2055.00    0.868   169.99
2056.00    0.866   170.13
2057.00    0.864   170.26
2058.00    0.862   170.40
2059.00    0.859   170.54
2060.00    0.857   170.68
2061.00    0.854   170.83
2062.00    0.851   170.97
2063.00    0.848   171.11
2064.00    0.845   171.26
2065.00    0.841   171.40
2066.00    0.838   171.55
2067.00    0.834   171.70
2068.00    0.830   171.85
2069.00    0.826   172.00
2070.00    0.822   172.15
2071.00    0.818   172.30
2072.00    0.813   172.46
2073.00    0.808   172.62
2074.00    0.803   172.78
2075.00    0.798   172.94
2076.00    0.793   173.10
2077.00    0.787   173.27
2078.00    0.782   173.44
2079.00    0.776   173.61
2080.00    0.770   173.78
2081.00    0.764   173.96
2082.00    0.758   174.14
2083.00    0.751   174.32
2084.00    0.745   174.50
2085.00    0.738   174.69
2086.00    0.731   174.88
2087.00    0.724   175.08
2088.00    0.716   175.28
2089.00    0.709   175.48
2090.00    0.701   175.69
2091.00    0.694   175.90
2092.00    0.686   176.12
2093.00    0.677   176.35
2094.00    0.669   176.57
2095.00    0.661   176.81
2096.00    0.652   177.05
2097.00    0.643   177.30
2098.00    0.634   177.55
2099.00    0.625   177.81
2100.00    0.615   178.08
2101.00    0.606   178.36
2102.00    0.596   178.65
2103.00    0.586   178.94
2104.00    0.576   179.25
2105.00    0.566   179.57
2106.00    0.556   179.90
2107.00    0.545   180.24
2108.00    0.534   180.59
2109.00    0.524   180.96
2110.00    0.513   181.35
2111.00    0.501   181.75
2112.00    0.490   182.17
2113.00    0.478   182.62
2114.00    0.467   183.08
2115.00    0.455   183.57
2116.00    0.443   184.08
2117.00    0.431   184.63
2118.00    0.419   185.20
2119.00    0.406   185.81
2120.00    0.394   186.46
2121.00    0.381   187.15
2122.00    0.368   187.89
2123.00    0.355   188.68
2124.00    0.342   189.53
2125.00    0.329   190.45
2126.00    0.316   191.45
2127.00    0.302   192.54
2128.00    0.289   193.72
2129.00    0.276   195.02
2130.00    0.262   196.45
2131.00    0.249   198.04
2132.00    0.236   199.80
2133.00    0.222   201.78
2134.00    0.209   204.00
2135.00    0.196   206.52
2136.00    0.184   209.39
2137.00    0.172   212.68
2138.00    0.160   216.46
2139.00    0.149   220.82
2140.00    0.139   225.84
2141.00    0.130   231.62
2142.00    0.122   238.20
2143.00    0.116   245.56
2144.00    0.112   253.60
2145.00    0.110   262.06
2146.00    0.110   270.63
2147.00    0.113   278.96
2148.00    0.118   286.74
2149.00    0.125   293.79
2150.00    0.133   300.06
2151.00    0.142   305.54
2152.00    0.153   310.32

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 18:42:59