Double Star Calculator - Orbit

Orbital Elements for I843AB
WDS: I843AB WDS ID/Discoverer
P: 188.360 Orbital period (years)
a: 1.013 Semi-major axis (arcseconds)
i: 130.7 Inclination (degrees)
Ω: 204.7 Longitude of ascending node (degrees)
T: 1875.300 Epoch of periastron passage (year)
e: 0.591 Eccentricity
ω: 232.5 Longitude of periastron (degrees)
Start-Year: 1930.82 Year
End-Year: 2119.18 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for I843AB
Position: 095506.30-263219.4 Epoch-2000 right ascension and declination
WDS-ID: 09551-2632 WDS designation
Discoverer Code: I843AB Discover designation and components
ADS number: 7580 Aitken Double Star catalog
HD number: 85994 HD catalog number
Hipparcos number: 48645 Hipparcos catalog number
V1: 8.98 Magnitude of the primary
V2: 9.68 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2011 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: USN2017b Reference

Double Star Orbit for I843AB



WDS 6th Orbit including measures of I843AB

-- 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 I843AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.759   105.85
--------------------------
1930.82    1.325   186.50
1931.82    1.330   185.91
1932.82    1.335   185.33
1933.82    1.339   184.76
1934.82    1.343   184.18
1935.82    1.346   183.61
1936.82    1.350   183.04
1937.82    1.352   182.48
1938.82    1.355   181.92
1939.82    1.357   181.35
1940.82    1.359   180.79
1941.82    1.360   180.24
1942.82    1.361   179.68
1943.82    1.362   179.12
1944.82    1.363   178.57
1945.82    1.363   178.01
1946.82    1.363   177.46
1947.82    1.362   176.90
1948.82    1.361   176.34
1949.82    1.360   175.79
1950.82    1.359   175.23
1951.82    1.357   174.67
1952.82    1.355   174.11
1953.82    1.353   173.55
1954.82    1.351   172.98
1955.82    1.348   172.42
1956.82    1.345   171.85
1957.82    1.342   171.28
1958.82    1.339   170.70
1959.82    1.335   170.12
1960.82    1.331   169.54
1961.82    1.327   168.96
1962.82    1.323   168.37
1963.82    1.318   167.78
1964.82    1.313   167.18
1965.82    1.308   166.58
1966.82    1.303   165.98
1967.82    1.297   165.37
1968.82    1.291   164.75
1969.82    1.286   164.13
1970.82    1.279   163.50
1971.82    1.273   162.87
1972.82    1.267   162.23
1973.82    1.260   161.58
1974.82    1.253   160.93
1975.82    1.246   160.27
1976.82    1.239   159.60
1977.82    1.231   158.92
1978.82    1.224   158.24
1979.82    1.216   157.54
1980.82    1.208   156.84
1981.82    1.200   156.13
1982.82    1.192   155.41
1983.82    1.183   154.68
1984.82    1.175   153.93
1985.82    1.166   153.18
1986.82    1.157   152.42
1987.82    1.148   151.64
1988.82    1.139   150.85
1989.82    1.130   150.05
1990.82    1.120   149.23
1991.82    1.111   148.40
1992.82    1.101   147.56
1993.82    1.092   146.70
1994.82    1.082   145.83
1995.82    1.072   144.94
1996.82    1.062   144.03
1997.82    1.052   143.11
1998.82    1.042   142.17
1999.82    1.032   141.21
2000.82    1.021   140.23
2001.82    1.011   139.23
2002.82    1.000   138.21
2003.82    0.990   137.17
2004.82    0.980   136.10
2005.82    0.969   135.02
2006.82    0.959   133.91
2007.82    0.948   132.77
2008.82    0.937   131.61
2009.82    0.927   130.42
2010.82    0.916   129.21
2011.82    0.906   127.96
2012.82    0.895   126.69
2013.82    0.885   125.39
2014.82    0.874   124.06
2015.82    0.864   122.69
2016.82    0.854   121.29
2017.82    0.844   119.86
2018.82    0.833   118.39
2019.82    0.823   116.89
2020.82    0.813   115.35
2021.82    0.804   113.77
2022.82    0.794   112.15
2023.82    0.784   110.50
2024.82    0.775   108.80
2025.82    0.766   107.06
2026.82    0.757   105.28
2027.82    0.748   103.45
2028.82    0.739   101.59
2029.82    0.730    99.68
2030.82    0.722    97.72
2031.82    0.714    95.72
2032.82    0.706    93.67
2033.82    0.698    91.58
2034.82    0.691    89.44
2035.82    0.683    87.25
2036.82    0.676    85.02
2037.82    0.669    82.74
2038.82    0.662    80.41
2039.82    0.656    78.04
2040.82    0.649    75.61
2041.82    0.642    73.14
2042.82    0.636    70.61
2043.82    0.629    68.04
2044.82    0.623    65.40
2045.82    0.616    62.71
2046.82    0.609    59.96
2047.82    0.601    57.14
2048.82    0.593    54.25
2049.82    0.585    51.27
2050.82    0.575    48.21
2051.82    0.565    45.04
2052.82    0.554    41.75
2053.82    0.542    38.31
2054.82    0.527    34.70
2055.82    0.512    30.88
2056.82    0.494    26.80
2057.82    0.474    22.41
2058.82    0.453    17.61
2059.82    0.429    12.30
2060.82    0.404     6.34
2061.82    0.377   359.58
2062.82    0.351   351.80
2063.82    0.327   342.82
2064.82    0.307   332.53
2065.82    0.293   321.02
2066.82    0.288   308.72
2067.82    0.291   296.34
2068.82    0.304   284.66
2069.82    0.325   274.20
2070.82    0.352   265.18
2071.82    0.384   257.53
2072.82    0.417   251.08
2073.82    0.453   245.62
2074.82    0.489   240.96
2075.82    0.525   236.94
2076.82    0.561   233.43
2077.82    0.596   230.34
2078.82    0.630   227.60
2079.82    0.664   225.13
2080.82    0.696   222.90
2081.82    0.728   220.86
2082.82    0.758   219.00
2083.82    0.788   217.27
2084.82    0.816   215.66
2085.82    0.843   214.17
2086.82    0.870   212.76
2087.82    0.895   211.44
2088.82    0.920   210.18
2089.82    0.943   208.99
2090.82    0.966   207.86
2091.82    0.988   206.78
2092.82    1.009   205.74
2093.82    1.029   204.75
2094.82    1.048   203.79
2095.82    1.066   202.87
2096.82    1.084   201.98
2097.82    1.101   201.11
2098.82    1.118   200.28
2099.82    1.133   199.46
2100.82    1.148   198.67
2101.82    1.163   197.90
2102.82    1.176   197.14
2103.82    1.189   196.40
2104.82    1.202   195.68
2105.82    1.214   194.97
2106.82    1.225   194.28
2107.82    1.236   193.60
2108.82    1.246   192.93
2109.82    1.256   192.27
2110.82    1.265   191.62
2111.82    1.274   190.98
2112.82    1.283   190.35
2113.82    1.290   189.73
2114.82    1.298   189.11
2115.82    1.305   188.50
2116.82    1.311   187.90
2117.82    1.317   187.30
2118.82    1.323   186.71






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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.


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Report created: 2026-06-25 16:22:20



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