Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:27:29

Orbital Elements for I5AB
WDS: I5AB WDS ID/Discoverer
P: 217.600 Orbital period (years)
a: 2.004 Semi-major axis (arcseconds)
i: 93.9 Inclination (degrees)
Ω: 91.6 Longitude of ascending node (degrees)
T: 2033.900 Epoch of periastron passage (year)
e: 0.336 Eccentricity
ω: 357.3 Longitude of periastron (degrees)
Start-Year: 1917.0 Year
End-Year: 2133.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I5AB
Position: 063800.39-613200.2 Epoch-2000 right ascension and declination
WDS-ID: 06380-6132 WDS designation
Discoverer Code: I5AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 48189 HD catalog number
Hipparcos number: 31711 Hipparcos catalog number
V1: 6.32 Magnitude of the primary
V2: 8.77 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2008 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for I5AB



WDS 6th Orbit including measures of I5AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)


Ephemeris of I5AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.153     94.2
-------------------------
1917.0     2.628    272.3
1918.0     2.637    272.2
1919.0     2.645    272.1
1920.0     2.653    272.1
1921.0     2.659    272.0
1922.0     2.664    272.0
1923.0     2.668    271.9
1924.0     2.672    271.8
1925.0     2.674    271.8
1926.0     2.676    271.7
1927.0     2.676    271.7
1928.0     2.676    271.6
1929.0     2.675    271.6
1930.0     2.673    271.5
1931.0     2.669    271.4
1932.0     2.665    271.4
1933.0     2.660    271.3
1934.0     2.654    271.3
1935.0     2.648    271.2
1936.0     2.640    271.1
1937.0     2.631    271.1
1938.0     2.621    271.0
1939.0     2.611    270.9
1940.0     2.599    270.9
1941.0     2.587    270.8
1942.0     2.573    270.8
1943.0     2.559    270.7
1944.0     2.543    270.6
1945.0     2.527    270.6
1946.0     2.510    270.5
1947.0     2.492    270.4
1948.0     2.472    270.4
1949.0     2.452    270.3
1950.0     2.431    270.2
1951.0     2.409    270.1
1952.0     2.386    270.1
1953.0     2.363    270.0
1954.0     2.338    269.9
1955.0     2.312    269.8
1956.0     2.285    269.8
1957.0     2.258    269.7
1958.0     2.229    269.6
1959.0     2.200    269.5
1960.0     2.169    269.4
1961.0     2.138    269.3
1962.0     2.105    269.2
1963.0     2.072    269.1
1964.0     2.038    269.0
1965.0     2.003    268.9
1966.0     1.966    268.8
1967.0     1.929    268.7
1968.0     1.891    268.6
1969.0     1.853    268.5
1970.0     1.813    268.3
1971.0     1.772    268.2
1972.0     1.730    268.1
1973.0     1.688    267.9
1974.0     1.644    267.8
1975.0     1.600    267.6
1976.0     1.555    267.4
1977.0     1.509    267.3
1978.0     1.462    267.1
1979.0     1.414    266.9
1980.0     1.365    266.6
1981.0     1.316    266.4
1982.0     1.266    266.1
1983.0     1.215    265.9
1984.0     1.163    265.6
1985.0     1.110    265.2
1986.0     1.057    264.9
1987.0     1.003    264.5
1988.0     0.948    264.0
1989.0     0.892    263.5
1990.0     0.836    262.9
1991.0     0.780    262.3
1992.0     0.722    261.5
1993.0     0.665    260.7
1994.0     0.607    259.6
1995.0     0.548    258.3
1996.0     0.490    256.7
1997.0     0.431    254.7
1998.0     0.373    252.1
1999.0     0.316    248.5
2000.0     0.260    243.3
2001.0     0.206    235.3
2002.0     0.160    222.3
2003.0     0.127    200.8
2004.0     0.120    171.7
2005.0     0.143    146.3
2006.0     0.186    130.1
2007.0     0.236    120.3
2008.0     0.291    114.1
2009.0     0.348    109.9
2010.0     0.406    106.9
2011.0     0.464    104.6
2012.0     0.521    102.9
2013.0     0.578    101.5
2014.0     0.635    100.3
2015.0     0.690     99.3
2016.0     0.745     98.5
2017.0     0.798     97.8
2018.0     0.849     97.2
2019.0     0.899     96.6
2020.0     0.947     96.1
2021.0     0.993     95.6
2022.0     1.037     95.2
2023.0     1.078     94.9
2024.0     1.117     94.5
2025.0     1.153     94.2
2026.0     1.186     93.9
2027.0     1.216     93.6
2028.0     1.242     93.3
2029.0     1.266     93.0
2030.0     1.286     92.7
2031.0     1.302     92.5
2032.0     1.315     92.2
2033.0     1.324     92.0
2034.0     1.330     91.8
2035.0     1.331     91.5
2036.0     1.329     91.3
2037.0     1.323     91.0
2038.0     1.313     90.8
2039.0     1.300     90.5
2040.0     1.283     90.3
2041.0     1.263     90.0
2042.0     1.240     89.8
2043.0     1.213     89.5
2044.0     1.183     89.2
2045.0     1.151     88.9
2046.0     1.115     88.5
2047.0     1.077     88.2
2048.0     1.037     87.8
2049.0     0.994     87.4
2050.0     0.949     86.9
2051.0     0.902     86.4
2052.0     0.854     85.9
2053.0     0.804     85.3
2054.0     0.753     84.6
2055.0     0.700     83.8
2056.0     0.646     82.8
2057.0     0.592     81.7
2058.0     0.537     80.4
2059.0     0.481     78.7
2060.0     0.425     76.6
2061.0     0.369     73.9
2062.0     0.314     70.2
2063.0     0.260     65.0
2064.0     0.209     57.2
2065.0     0.164     44.7
2066.0     0.132     24.7
2067.0     0.123    357.6
2068.0     0.142    332.6
2069.0     0.180    315.7
2070.0     0.228    305.3
2071.0     0.280    298.7
2072.0     0.335    294.1
2073.0     0.391    290.9
2074.0     0.447    288.4
2075.0     0.504    286.5
2076.0     0.561    285.0
2077.0     0.617    283.8
2078.0     0.673    282.8
2079.0     0.729    281.9
2080.0     0.785    281.2
2081.0     0.839    280.5
2082.0     0.894    280.0
2083.0     0.948    279.5
2084.0     1.001    279.0
2085.0     1.054    278.6
2086.0     1.106    278.2
2087.0     1.157    277.9
2088.0     1.208    277.6
2089.0     1.257    277.3
2090.0     1.307    277.1
2091.0     1.355    276.8
2092.0     1.403    276.6
2093.0     1.449    276.4
2094.0     1.495    276.2
2095.0     1.541    276.0
2096.0     1.585    275.8
2097.0     1.629    275.7
2098.0     1.672    275.5
2099.0     1.713    275.4
2100.0     1.755    275.2
2101.0     1.795    275.1
2102.0     1.834    275.0
2103.0     1.873    274.8
2104.0     1.910    274.7
2105.0     1.947    274.6
2106.0     1.983    274.5
2107.0     2.018    274.4
2108.0     2.052    274.3
2109.0     2.086    274.2
2110.0     2.118    274.1
2111.0     2.149    274.0
2112.0     2.180    273.9
2113.0     2.210    273.8
2114.0     2.238    273.7
2115.0     2.266    273.6
2116.0     2.293    273.6
2117.0     2.319    273.5
2118.0     2.345    273.4
2119.0     2.369    273.3
2120.0     2.392    273.2
2121.0     2.415    273.2
2122.0     2.436    273.1
2123.0     2.457    273.0
2124.0     2.476    273.0
2125.0     2.495    272.9
2126.0     2.513    272.8
2127.0     2.530    272.8
2128.0     2.546    272.7
2129.0     2.561    272.6
2130.0     2.575    272.6
2131.0     2.588    272.5
2132.0     2.601    272.4






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 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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