Double Star Calculator - Orbit

Orbital Elements for I337AB

WDS:	I337AB	WDS ID/Discoverer
P:	240.000	Orbital period (years)
a:	0.695	Semi-major axis (arcseconds)
i:	88.4	Inclination (degrees)
Ω:	279.1	Longitude of ascending node (degrees)
T:	2010.420	Epoch of periastron passage (year)
e:	0.714	Eccentricity
ω:	148.6	Longitude of periastron (degrees)
Start-Year:	1905.0	Year
End-Year:	2145.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I337AB
Position:	212309.94-870308.4	Epoch-2000 right ascension and declination
WDS-ID:	21232-8703	WDS designation
Discoverer Code:	I337AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	198477	HD catalog number
Hipparcos number:	105585	Hipparcos catalog number
V1:	9.1	Magnitude of the primary
V2:	10.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2018d	Reference

Double Star Orbit for I337AB

WDS 6th Orbit including measures of I337AB

-- 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 I337AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.098   106.14
--------------------------
1905.00    1.058   278.31
1906.00    1.060   278.33
1907.00    1.062   278.34
1908.00    1.063   278.35
1909.00    1.064   278.36
1910.00    1.065   278.38
1911.00    1.066   278.39
1912.00    1.067   278.40
1913.00    1.068   278.41
1914.00    1.068   278.43
1915.00    1.069   278.44
1916.00    1.069   278.45
1917.00    1.069   278.46
1918.00    1.069   278.48
1919.00    1.068   278.49
1920.00    1.068   278.50
1921.00    1.067   278.51
1922.00    1.066   278.53
1923.00    1.065   278.54
1924.00    1.064   278.55
1925.00    1.063   278.56
1926.00    1.061   278.58
1927.00    1.060   278.59
1928.00    1.058   278.60
1929.00    1.056   278.61
1930.00    1.054   278.63
1931.00    1.051   278.64
1932.00    1.049   278.65
1933.00    1.046   278.67
1934.00    1.043   278.68
1935.00    1.040   278.69
1936.00    1.036   278.70
1937.00    1.033   278.72
1938.00    1.029   278.73
1939.00    1.025   278.74
1940.00    1.021   278.76
1941.00    1.017   278.77
1942.00    1.012   278.79
1943.00    1.007   278.80
1944.00    1.002   278.81
1945.00    0.997   278.83
1946.00    0.992   278.84
1947.00    0.986   278.86
1948.00    0.980   278.87
1949.00    0.974   278.89
1950.00    0.968   278.90
1951.00    0.961   278.92
1952.00    0.954   278.93
1953.00    0.947   278.95
1954.00    0.940   278.96
1955.00    0.932   278.98
1956.00    0.925   279.00
1957.00    0.916   279.01
1958.00    0.908   279.03
1959.00    0.899   279.05
1960.00    0.890   279.06
1961.00    0.881   279.08
1962.00    0.872   279.10
1963.00    0.862   279.12
1964.00    0.852   279.14
1965.00    0.841   279.16
1966.00    0.830   279.18
1967.00    0.819   279.20
1968.00    0.808   279.22
1969.00    0.796   279.24
1970.00    0.784   279.27
1971.00    0.771   279.29
1972.00    0.758   279.31
1973.00    0.745   279.34
1974.00    0.731   279.37
1975.00    0.717   279.39
1976.00    0.703   279.42
1977.00    0.688   279.45
1978.00    0.672   279.48
1979.00    0.656   279.51
1980.00    0.640   279.55
1981.00    0.623   279.58
1982.00    0.606   279.62
1983.00    0.588   279.66
1984.00    0.569   279.70
1985.00    0.550   279.75
1986.00    0.530   279.79
1987.00    0.510   279.85
1988.00    0.489   279.90
1989.00    0.467   279.97
1990.00    0.445   280.03
1991.00    0.422   280.11
1992.00    0.398   280.19
1993.00    0.373   280.29
1994.00    0.348   280.40
1995.00    0.321   280.52
1996.00    0.294   280.68
1997.00    0.265   280.86
1998.00    0.236   281.08
1999.00    0.206   281.37
2000.00    0.174   281.77
2001.00    0.142   282.34
2002.00    0.108   283.26
2003.00    0.074   285.03
2004.00    0.039   289.89
2005.00    0.008   345.66
2006.00    0.033    87.84
2007.00    0.068    94.12
2008.00    0.101    96.18
2009.00    0.132    97.24
2010.00    0.160    97.90
2011.00    0.182    98.39
2012.00    0.200    98.78
2013.00    0.212    99.11
2014.00    0.219    99.41
2015.00    0.222    99.70
2016.00    0.220    99.99
2017.00    0.216   100.29
2018.00    0.209   100.60
2019.00    0.200   100.94
2020.00    0.189   101.32
2021.00    0.177   101.74
2022.00    0.164   102.23
2023.00    0.150   102.80
2024.00    0.136   103.49
2025.00    0.121   104.36
2026.00    0.106   105.46
2027.00    0.090   106.94
2028.00    0.075   109.04
2029.00    0.059   112.25
2030.00    0.044   117.76
2031.00    0.029   129.07
2032.00    0.017   158.72
2033.00    0.017   215.38
2034.00    0.029   245.67
2035.00    0.043   257.17
2036.00    0.059   262.74
2037.00    0.075   265.97
2038.00    0.090   268.08
2039.00    0.106   269.56
2040.00    0.122   270.65
2041.00    0.138   271.49
2042.00    0.153   272.17
2043.00    0.169   272.71
2044.00    0.184   273.17
2045.00    0.200   273.55
2046.00    0.215   273.88
2047.00    0.230   274.17
2048.00    0.245   274.42
2049.00    0.260   274.65
2050.00    0.274   274.84
2051.00    0.289   275.02
2052.00    0.303   275.19
2053.00    0.318   275.33
2054.00    0.332   275.47
2055.00    0.346   275.59
2056.00    0.360   275.70
2057.00    0.373   275.81
2058.00    0.387   275.91
2059.00    0.401   276.00
2060.00    0.414   276.08
2061.00    0.427   276.16
2062.00    0.440   276.24
2063.00    0.453   276.31
2064.00    0.466   276.38
2065.00    0.479   276.44
2066.00    0.491   276.50
2067.00    0.504   276.56
2068.00    0.516   276.61
2069.00    0.528   276.67
2070.00    0.540   276.71
2071.00    0.552   276.76
2072.00    0.563   276.81
2073.00    0.575   276.85
2074.00    0.586   276.89
2075.00    0.598   276.93
2076.00    0.609   276.97
2077.00    0.620   277.01
2078.00    0.631   277.05
2079.00    0.642   277.08
2080.00    0.652   277.12
2081.00    0.663   277.15
2082.00    0.673   277.18
2083.00    0.683   277.21
2084.00    0.693   277.24
2085.00    0.703   277.27
2086.00    0.713   277.30
2087.00    0.723   277.33
2088.00    0.732   277.35
2089.00    0.742   277.38
2090.00    0.751   277.40
2091.00    0.760   277.43
2092.00    0.769   277.45
2093.00    0.778   277.48
2094.00    0.787   277.50
2095.00    0.796   277.52
2096.00    0.804   277.54
2097.00    0.813   277.57
2098.00    0.821   277.59
2099.00    0.829   277.61
2100.00    0.837   277.63
2101.00    0.845   277.65
2102.00    0.853   277.67
2103.00    0.860   277.69
2104.00    0.868   277.71
2105.00    0.875   277.72
2106.00    0.882   277.74
2107.00    0.889   277.76
2108.00    0.896   277.78
2109.00    0.903   277.80
2110.00    0.910   277.81
2111.00    0.916   277.83
2112.00    0.923   277.85
2113.00    0.929   277.86
2114.00    0.935   277.88
2115.00    0.941   277.90
2116.00    0.947   277.91
2117.00    0.953   277.93
2118.00    0.958   277.94
2119.00    0.964   277.96
2120.00    0.969   277.97
2121.00    0.974   277.99
2122.00    0.979   278.00
2123.00    0.984   278.02
2124.00    0.989   278.03
2125.00    0.994   278.05
2126.00    0.998   278.06
2127.00    1.003   278.08
2128.00    1.007   278.09
2129.00    1.011   278.10
2130.00    1.015   278.12
2131.00    1.019   278.13
2132.00    1.023   278.15
2133.00    1.026   278.16
2134.00    1.030   278.17
2135.00    1.033   278.19
2136.00    1.036   278.20
2137.00    1.039   278.21
2138.00    1.042   278.22
2139.00    1.045   278.24
2140.00    1.048   278.25
2141.00    1.050   278.26
2142.00    1.052   278.28
2143.00    1.054   278.29
2144.00    1.056   278.30

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 18:25:57