Double Star Calculator - Orbit

Orbital Elements for I264AB

WDS:	I264AB	WDS ID/Discoverer
P:	250.000	Orbital period (years)
a:	1.46	Semi-major axis (arcseconds)
i:	107.4	Inclination (degrees)
Ω:	141.0	Longitude of ascending node (degrees)
T:	1889.500	Epoch of periastron passage (year)
e:	0.892	Eccentricity
ω:	276.9	Longitude of periastron (degrees)
Start-Year:	1900.0	Year
End-Year:	2150.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I264AB
Position:	013135.29-532210.1	Epoch-2000 right ascension and declination
WDS-ID:	01316-5322	WDS designation
Discoverer Code:	I264AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	9438	HD catalog number
Hipparcos number:	7111	Hipparcos catalog number
V1:	8.36	Magnitude of the primary
V2:	8.84	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1995	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:	USN2002	Reference

Double Star Orbit for I264AB

WDS 6th Orbit including measures of I264AB

-- 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 I264AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.920    22.85
--------------------------
1900.00    0.528   120.73
1901.00    0.541   119.28
1902.00    0.553   117.90
1903.00    0.564   116.57
1904.00    0.574   115.29
1905.00    0.583   114.05
1906.00    0.591   112.84
1907.00    0.598   111.67
1908.00    0.605   110.53
1909.00    0.611   109.41
1910.00    0.617   108.31
1911.00    0.623   107.23
1912.00    0.627   106.16
1913.00    0.632   105.12
1914.00    0.636   104.09
1915.00    0.640   103.07
1916.00    0.644   102.06
1917.00    0.648   101.07
1918.00    0.651   100.08
1919.00    0.654    99.11
1920.00    0.657    98.14
1921.00    0.660    97.18
1922.00    0.662    96.24
1923.00    0.665    95.29
1924.00    0.667    94.36
1925.00    0.670    93.43
1926.00    0.672    92.51
1927.00    0.674    91.59
1928.00    0.676    90.68
1929.00    0.679    89.78
1930.00    0.681    88.88
1931.00    0.682    87.99
1932.00    0.684    87.10
1933.00    0.686    86.22
1934.00    0.688    85.34
1935.00    0.690    84.46
1936.00    0.692    83.59
1937.00    0.694    82.73
1938.00    0.695    81.87
1939.00    0.697    81.01
1940.00    0.699    80.16
1941.00    0.701    79.31
1942.00    0.702    78.47
1943.00    0.704    77.63
1944.00    0.706    76.80
1945.00    0.708    75.97
1946.00    0.710    75.14
1947.00    0.711    74.32
1948.00    0.713    73.50
1949.00    0.715    72.69
1950.00    0.717    71.88
1951.00    0.719    71.08
1952.00    0.721    70.27
1953.00    0.723    69.48
1954.00    0.725    68.69
1955.00    0.727    67.90
1956.00    0.729    67.11
1957.00    0.731    66.33
1958.00    0.733    65.56
1959.00    0.735    64.79
1960.00    0.737    64.02
1961.00    0.739    63.26
1962.00    0.741    62.50
1963.00    0.743    61.75
1964.00    0.746    61.00
1965.00    0.748    60.26
1966.00    0.750    59.52
1967.00    0.752    58.78
1968.00    0.755    58.05
1969.00    0.757    57.33
1970.00    0.759    56.60
1971.00    0.762    55.89
1972.00    0.764    55.17
1973.00    0.767    54.47
1974.00    0.769    53.76
1975.00    0.772    53.06
1976.00    0.774    52.37
1977.00    0.777    51.68
1978.00    0.779    50.99
1979.00    0.782    50.31
1980.00    0.785    49.64
1981.00    0.787    48.97
1982.00    0.790    48.30
1983.00    0.793    47.64
1984.00    0.795    46.98
1985.00    0.798    46.32
1986.00    0.801    45.68
1987.00    0.804    45.03
1988.00    0.807    44.39
1989.00    0.809    43.76
1990.00    0.812    43.12
1991.00    0.815    42.50
1992.00    0.818    41.88
1993.00    0.821    41.26
1994.00    0.824    40.64
1995.00    0.827    40.03
1996.00    0.830    39.43
1997.00    0.833    38.83
1998.00    0.835    38.23
1999.00    0.838    37.64
2000.00    0.841    37.05
2001.00    0.844    36.47
2002.00    0.847    35.89
2003.00    0.850    35.31
2004.00    0.853    34.74
2005.00    0.856    34.17
2006.00    0.859    33.61
2007.00    0.862    33.05
2008.00    0.865    32.49
2009.00    0.868    31.94
2010.00    0.871    31.39
2011.00    0.874    30.85
2012.00    0.877    30.30
2013.00    0.880    29.77
2014.00    0.883    29.23
2015.00    0.886    28.70
2016.00    0.889    28.18
2017.00    0.892    27.65
2018.00    0.895    27.13
2019.00    0.898    26.62
2020.00    0.901    26.10
2021.00    0.904    25.60
2022.00    0.907    25.09
2023.00    0.910    24.59
2024.00    0.912    24.09
2025.00    0.915    23.59
2026.00    0.918    23.10
2027.00    0.921    22.60
2028.00    0.924    22.12
2029.00    0.927    21.63
2030.00    0.929    21.15
2031.00    0.932    20.67
2032.00    0.935    20.19
2033.00    0.937    19.72
2034.00    0.940    19.25
2035.00    0.943    18.78
2036.00    0.945    18.32
2037.00    0.948    17.85
2038.00    0.950    17.39
2039.00    0.953    16.93
2040.00    0.955    16.48
2041.00    0.958    16.02
2042.00    0.960    15.57
2043.00    0.962    15.12
2044.00    0.965    14.68
2045.00    0.967    14.23
2046.00    0.969    13.79
2047.00    0.971    13.35
2048.00    0.973    12.91
2049.00    0.976    12.47
2050.00    0.978    12.04
2051.00    0.980    11.60
2052.00    0.981    11.17
2053.00    0.983    10.74
2054.00    0.985    10.31
2055.00    0.987     9.89
2056.00    0.989     9.46
2057.00    0.990     9.04
2058.00    0.992     8.62
2059.00    0.993     8.20
2060.00    0.995     7.78
2061.00    0.996     7.36
2062.00    0.997     6.94
2063.00    0.999     6.52
2064.00    1.000     6.11
2065.00    1.001     5.69
2066.00    1.002     5.28
2067.00    1.003     4.86
2068.00    1.003     4.45
2069.00    1.004     4.04
2070.00    1.005     3.63
2071.00    1.005     3.22
2072.00    1.006     2.81
2073.00    1.006     2.40
2074.00    1.006     1.99
2075.00    1.007     1.58
2076.00    1.007     1.17
2077.00    1.007     0.76
2078.00    1.006     0.35
2079.00    1.006   359.94
2080.00    1.006   359.53
2081.00    1.005   359.12
2082.00    1.004   358.71
2083.00    1.004   358.30
2084.00    1.003   357.89
2085.00    1.002   357.47
2086.00    1.000   357.06
2087.00    0.999   356.64
2088.00    0.997   356.23
2089.00    0.996   355.81
2090.00    0.994   355.39
2091.00    0.992   354.97
2092.00    0.990   354.55
2093.00    0.987   354.12
2094.00    0.985   353.69
2095.00    0.982   353.27
2096.00    0.979   352.83
2097.00    0.976   352.40
2098.00    0.972   351.96
2099.00    0.968   351.52
2100.00    0.964   351.08
2101.00    0.960   350.63
2102.00    0.956   350.18
2103.00    0.951   349.72
2104.00    0.946   349.26
2105.00    0.941   348.79
2106.00    0.935   348.32
2107.00    0.929   347.84
2108.00    0.923   347.36
2109.00    0.916   346.87
2110.00    0.909   346.37
2111.00    0.901   345.86
2112.00    0.893   345.35
2113.00    0.885   344.82
2114.00    0.876   344.29
2115.00    0.866   343.74
2116.00    0.856   343.18
2117.00    0.845   342.61
2118.00    0.834   342.02
2119.00    0.822   341.41
2120.00    0.809   340.79
2121.00    0.795   340.15
2122.00    0.781   339.48
2123.00    0.765   338.78
2124.00    0.748   338.06
2125.00    0.730   337.30
2126.00    0.711   336.50
2127.00    0.690   335.66
2128.00    0.667   334.76
2129.00    0.643   333.79
2130.00    0.615   332.74
2131.00    0.585   331.59
2132.00    0.552   330.31
2133.00    0.514   328.84
2134.00    0.471   327.13
2135.00    0.421   325.05
2136.00    0.361   322.32
2137.00    0.287   318.34
2138.00    0.191   310.91
2139.00    0.074   281.64
2140.00    0.101   165.04
2141.00    0.211   146.21
2142.00    0.289   139.51
2143.00    0.345   135.38
2144.00    0.388   132.30
2145.00    0.423   129.78
2146.00    0.451   127.60
2147.00    0.475   125.67
2148.00    0.495   123.90
2149.00    0.512   122.26

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 14:51:24