Double Star Calculator - Orbit

Orbital Elements for I413

WDS:	I413	WDS ID/Discoverer
P:	142.400	Orbital period (years)
a:	0.484	Semi-major axis (arcseconds)
i:	31.7	Inclination (degrees)
Ω:	95.9	Longitude of ascending node (degrees)
T:	1968.600	Epoch of periastron passage (year)
e:	0.75	Eccentricity
ω:	69.7	Longitude of periastron (degrees)
Start-Year:	1953.8	Year
End-Year:	2096.2	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for I413
Position:	042731.65-242726.4	Epoch-2000 right ascension and declination
WDS-ID:	04275-2427	WDS designation
Discoverer Code:	I413	Discover designation and components
ADS number:	3241	Aitken Double Star catalog
HD number:	28368	HD catalog number
Hipparcos number:	20807	Hipparcos catalog number
V1:	8.51	Magnitude of the primary
V2:	9.48	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	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:	Hrt2010a	Reference

Double Star Orbit for I413

WDS 6th Orbit including measures of I413

-- 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 I413

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.732   334.24
--------------------------
1953.80    0.372    38.37
1954.80    0.357    40.88
1955.80    0.343    43.60
1956.80    0.327    46.57
1957.80    0.312    49.84
1958.80    0.295    53.46
1959.80    0.278    57.52
1960.80    0.260    62.12
1961.80    0.241    67.43
1962.80    0.222    73.65
1963.80    0.201    81.11
1964.80    0.179    90.34
1965.80    0.157   102.20
1966.80    0.134   118.09
1967.80    0.114   139.99
1968.80    0.104   168.47
1969.80    0.110   198.17
1970.80    0.130   221.83
1971.80    0.155   238.48
1972.80    0.183   250.23
1973.80    0.210   258.91
1974.80    0.236   265.63
1975.80    0.261   271.05
1976.80    0.284   275.54
1977.80    0.306   279.36
1978.80    0.327   282.68
1979.80    0.347   285.61
1980.80    0.366   288.23
1981.80    0.384   290.59
1982.80    0.402   292.75
1983.80    0.418   294.73
1984.80    0.434   296.57
1985.80    0.449   298.28
1986.80    0.463   299.89
1987.80    0.477   301.40
1988.80    0.490   302.82
1989.80    0.503   304.17
1990.80    0.515   305.46
1991.80    0.527   306.69
1992.80    0.538   307.87
1993.80    0.549   308.99
1994.80    0.559   310.08
1995.80    0.569   311.13
1996.80    0.579   312.14
1997.80    0.588   313.12
1998.80    0.597   314.07
1999.80    0.605   314.99
2000.80    0.613   315.89
2001.80    0.621   316.76
2002.80    0.629   317.62
2003.80    0.636   318.45
2004.80    0.643   319.27
2005.80    0.650   320.06
2006.80    0.656   320.85
2007.80    0.662   321.61
2008.80    0.668   322.37
2009.80    0.673   323.11
2010.80    0.679   323.84
2011.80    0.684   324.56
2012.80    0.689   325.26
2013.80    0.693   325.96
2014.80    0.697   326.65
2015.80    0.702   327.33
2016.80    0.705   328.01
2017.80    0.709   328.67
2018.80    0.712   329.33
2019.80    0.716   329.99
2020.80    0.719   330.63
2021.80    0.721   331.28
2022.80    0.724   331.92
2023.80    0.726   332.55
2024.80    0.728   333.18
2025.80    0.730   333.81
2026.80    0.732   334.43
2027.80    0.734   335.05
2028.80    0.735   335.67
2029.80    0.736   336.28
2030.80    0.737   336.90
2031.80    0.738   337.51
2032.80    0.738   338.12
2033.80    0.739   338.73
2034.80    0.739   339.34
2035.80    0.739   339.96
2036.80    0.739   340.57
2037.80    0.738   341.18
2038.80    0.738   341.79
2039.80    0.737   342.40
2040.80    0.736   343.02
2041.80    0.735   343.63
2042.80    0.734   344.25
2043.80    0.732   344.87
2044.80    0.731   345.49
2045.80    0.729   346.12
2046.80    0.727   346.75
2047.80    0.724   347.38
2048.80    0.722   348.02
2049.80    0.720   348.66
2050.80    0.717   349.31
2051.80    0.714   349.96
2052.80    0.711   350.61
2053.80    0.708   351.28
2054.80    0.704   351.95
2055.80    0.700   352.62
2056.80    0.697   353.31
2057.80    0.693   354.00
2058.80    0.688   354.70
2059.80    0.684   355.40
2060.80    0.679   356.12
2061.80    0.675   356.85
2062.80    0.670   357.59
2063.80    0.664   358.33
2064.80    0.659   359.10
2065.80    0.653   359.87
2066.80    0.648     0.66
2067.80    0.642     1.46
2068.80    0.636     2.28
2069.80    0.629     3.11
2070.80    0.623     3.96
2071.80    0.616     4.83
2072.80    0.609     5.72
2073.80    0.602     6.63
2074.80    0.594     7.56
2075.80    0.587     8.52
2076.80    0.579     9.50
2077.80    0.571    10.51
2078.80    0.562    11.54
2079.80    0.554    12.62
2080.80    0.545    13.72
2081.80    0.536    14.86
2082.80    0.526    16.04
2083.80    0.517    17.27
2084.80    0.507    18.54
2085.80    0.497    19.87
2086.80    0.486    21.25
2087.80    0.475    22.69
2088.80    0.464    24.20
2089.80    0.453    25.78
2090.80    0.441    27.45
2091.80    0.429    29.21
2092.80    0.417    31.07
2093.80    0.404    33.05
2094.80    0.391    35.16
2095.80    0.377    37.42

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 15:24:21