Double Star Calculator - Orbit

Orbital Elements for I507AB
WDS: I507AB WDS ID/Discoverer
P: 205.690 Orbital period (years)
a: 1.052 Semi-major axis (arcseconds)
i: 87.9 Inclination (degrees)
Ω: 4.3 Longitude of ascending node (degrees)
T: 2024.147 Epoch of periastron passage (year)
e: 0.429 Eccentricity
ω: 69.6 Longitude of periastron (degrees)
Start-Year: 1922.155 Year
End-Year: 2127.845 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I507AB
Position: 112205.29-244639.8 Epoch-2000 right ascension and declination
WDS-ID: 11221-2447 WDS designation
Discoverer Code: I507AB Discover designation and components
ADS number: 8141 Aitken Double Star catalog
HD number: 98800 HD catalog number
Hipparcos number: 55505 Hipparcos catalog number
V1: 9.59 Magnitude of the primary
V2: 10.06 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: Tok2018e Reference

Double Star Orbit for I507AB



WDS 6th Orbit including measures of I507AB

-- 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 I507AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.097    17.28
--------------------------
1922.15    0.510   190.13
1923.15    0.491   190.39
1924.15    0.472   190.66
1925.15    0.453   190.96
1926.15    0.433   191.29
1927.15    0.413   191.65
1928.15    0.394   192.04
1929.15    0.374   192.48
1930.15    0.354   192.96
1931.15    0.334   193.51
1932.15    0.313   194.12
1933.15    0.293   194.82
1934.15    0.273   195.62
1935.15    0.253   196.55
1936.15    0.232   197.64
1937.15    0.212   198.94
1938.15    0.192   200.52
1939.15    0.172   202.47
1940.15    0.152   204.92
1941.15    0.132   208.12
1942.15    0.113   212.41
1943.15    0.095   218.39
1944.15    0.078   227.06
1945.15    0.064   239.97
1946.15    0.055   258.56
1947.15    0.053   281.25
1948.15    0.059   302.17
1949.15    0.071   317.50
1950.15    0.087   327.83
1951.15    0.105   334.85
1952.15    0.124   339.80
1953.15    0.143   343.42
1954.15    0.163   346.18
1955.15    0.183   348.33
1956.15    0.203   350.06
1957.15    0.223   351.47
1958.15    0.243   352.65
1959.15    0.264   353.65
1960.15    0.284   354.51
1961.15    0.304   355.25
1962.15    0.324   355.90
1963.15    0.344   356.48
1964.15    0.363   356.99
1965.15    0.383   357.46
1966.15    0.402   357.87
1967.15    0.422   358.25
1968.15    0.441   358.59
1969.15    0.460   358.91
1970.15    0.478   359.20
1971.15    0.496   359.47
1972.15    0.515   359.72
1973.15    0.532   359.96
1974.15    0.550     0.18
1975.15    0.567     0.38
1976.15    0.584     0.58
1977.15    0.600     0.76
1978.15    0.616     0.93
1979.15    0.632     1.10
1980.15    0.647     1.25
1981.15    0.662     1.40
1982.15    0.676     1.55
1983.15    0.689     1.68
1984.15    0.703     1.82
1985.15    0.715     1.94
1986.15    0.727     2.07
1987.15    0.738     2.19
1988.15    0.749     2.30
1989.15    0.758     2.42
1990.15    0.767     2.53
1991.15    0.776     2.63
1992.15    0.783     2.74
1993.15    0.789     2.84
1994.15    0.795     2.95
1995.15    0.799     3.05
1996.15    0.803     3.15
1997.15    0.805     3.25
1998.15    0.806     3.34
1999.15    0.806     3.44
2000.15    0.804     3.54
2001.15    0.801     3.64
2002.15    0.797     3.74
2003.15    0.791     3.84
2004.15    0.783     3.95
2005.15    0.774     4.05
2006.15    0.763     4.16
2007.15    0.750     4.27
2008.15    0.735     4.39
2009.15    0.718     4.51
2010.15    0.699     4.64
2011.15    0.678     4.77
2012.15    0.655     4.92
2013.15    0.630     5.07
2014.15    0.602     5.24
2015.15    0.572     5.43
2016.15    0.540     5.64
2017.15    0.505     5.87
2018.15    0.469     6.14
2019.15    0.430     6.46
2020.15    0.389     6.84
2021.15    0.347     7.32
2022.15    0.303     7.93
2023.15    0.257     8.75
2024.15    0.210     9.94
2025.15    0.162    11.82
2026.15    0.114    15.28
2027.15    0.066    23.80
2028.15    0.026    64.88
2029.15    0.044   153.11
2030.15    0.090   169.72
2031.15    0.138   174.89
2032.15    0.186   177.38
2033.15    0.234   178.85
2034.15    0.281   179.83
2035.15    0.327   180.53
2036.15    0.371   181.05
2037.15    0.415   181.47
2038.15    0.457   181.81
2039.15    0.498   182.09
2040.15    0.537   182.33
2041.15    0.575   182.54
2042.15    0.611   182.72
2043.15    0.646   182.88
2044.15    0.680   183.03
2045.15    0.712   183.16
2046.15    0.742   183.28
2047.15    0.771   183.39
2048.15    0.799   183.50
2049.15    0.825   183.60
2050.15    0.850   183.69
2051.15    0.874   183.77
2052.15    0.896   183.85
2053.15    0.917   183.93
2054.15    0.937   184.01
2055.15    0.956   184.08
2056.15    0.973   184.15
2057.15    0.989   184.21
2058.15    1.004   184.28
2059.15    1.019   184.34
2060.15    1.032   184.40
2061.15    1.044   184.46
2062.15    1.055   184.52
2063.15    1.065   184.58
2064.15    1.074   184.63
2065.15    1.082   184.69
2066.15    1.090   184.74
2067.15    1.096   184.80
2068.15    1.102   184.85
2069.15    1.107   184.90
2070.15    1.111   184.95
2071.15    1.114   185.01
2072.15    1.117   185.06
2073.15    1.119   185.11
2074.15    1.120   185.16
2075.15    1.121   185.21
2076.15    1.120   185.26
2077.15    1.120   185.31
2078.15    1.118   185.36
2079.15    1.116   185.42
2080.15    1.113   185.47
2081.15    1.110   185.52
2082.15    1.106   185.57
2083.15    1.102   185.62
2084.15    1.097   185.68
2085.15    1.092   185.73
2086.15    1.086   185.78
2087.15    1.079   185.84
2088.15    1.072   185.89
2089.15    1.065   185.95
2090.15    1.057   186.01
2091.15    1.049   186.07
2092.15    1.040   186.12
2093.15    1.031   186.18
2094.15    1.021   186.25
2095.15    1.011   186.31
2096.15    1.000   186.37
2097.15    0.990   186.44
2098.15    0.978   186.50
2099.15    0.967   186.57
2100.15    0.955   186.64
2101.15    0.943   186.71
2102.15    0.930   186.78
2103.15    0.917   186.86
2104.15    0.904   186.94
2105.15    0.890   187.02
2106.15    0.876   187.10
2107.15    0.862   187.18
2108.15    0.847   187.27
2109.15    0.832   187.36
2110.15    0.817   187.46
2111.15    0.802   187.55
2112.15    0.786   187.66
2113.15    0.770   187.76
2114.15    0.754   187.87
2115.15    0.737   187.99
2116.15    0.721   188.11
2117.15    0.704   188.23
2118.15    0.687   188.37
2119.15    0.669   188.51
2120.15    0.652   188.65
2121.15    0.634   188.81
2122.15    0.616   188.97
2123.15    0.598   189.15
2124.15    0.580   189.33
2125.15    0.561   189.53
2126.15    0.542   189.74
2127.15    0.523   189.97






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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 16:37:47



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