Double Star Calculator - Orbit

Orbital Elements for HU398

WDS:	HU398	WDS ID/Discoverer
P:	152.700	Orbital period (years)
a:	0.313	Semi-major axis (arcseconds)
i:	5.7	Inclination (degrees)
Ω:	121.9	Longitude of ascending node (degrees)
T:	1957.870	Epoch of periastron passage (year)
e:	0.591	Eccentricity
ω:	3.7	Longitude of periastron (degrees)
Start-Year:	1948.65	Year
End-Year:	2101.35	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU398
Position:	230222.68+183631.9	Epoch-2000 right ascension and declination
WDS-ID:	23024+1837	WDS designation
Discoverer Code:	HU398	Discover designation and components
ADS number:	16463	Aitken Double Star catalog
HD number:	217716	HD catalog number
Hipparcos number:	113768	Hipparcos catalog number
V1:	9.58	Magnitude of the primary
V2:	10.04	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Hrt2014b	Reference

Double Star Orbit for HU398

WDS 6th Orbit including measures of HU398

-- 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 HU398

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.494   299.78
--------------------------
1948.65    0.184    45.57
1949.65    0.175    51.34
1950.65    0.166    57.72
1951.65    0.158    64.80
1952.65    0.150    72.65
1953.65    0.143    81.32
1954.65    0.137    90.80
1955.65    0.132   101.03
1956.65    0.129   111.88
1957.65    0.128   123.09
1958.65    0.129   134.38
1959.65    0.131   145.43
1960.65    0.135   155.97
1961.65    0.140   165.80
1962.65    0.147   174.84
1963.65    0.154   183.06
1964.65    0.162   190.48
1965.65    0.171   197.17
1966.65    0.180   203.20
1967.65    0.189   208.64
1968.65    0.199   213.58
1969.65    0.208   218.07
1970.65    0.217   222.18
1971.65    0.227   225.94
1972.65    0.236   229.41
1973.65    0.245   232.62
1974.65    0.254   235.60
1975.65    0.263   238.38
1976.65    0.271   240.98
1977.65    0.280   243.42
1978.65    0.288   245.72
1979.65    0.296   247.89
1980.65    0.304   249.95
1981.65    0.312   251.91
1982.65    0.319   253.77
1983.65    0.327   255.54
1984.65    0.334   257.24
1985.65    0.341   258.87
1986.65    0.348   260.43
1987.65    0.354   261.94
1988.65    0.361   263.39
1989.65    0.367   264.79
1990.65    0.373   266.14
1991.65    0.379   267.45
1992.65    0.385   268.72
1993.65    0.391   269.95
1994.65    0.396   271.15
1995.65    0.402   272.31
1996.65    0.407   273.45
1997.65    0.412   274.55
1998.65    0.416   275.64
1999.65    0.421   276.69
2000.65    0.426   277.73
2001.65    0.430   278.74
2002.65    0.434   279.73
2003.65    0.438   280.71
2004.65    0.442   281.66
2005.65    0.446   282.60
2006.65    0.450   283.53
2007.65    0.453   284.43
2008.65    0.457   285.33
2009.65    0.460   286.21
2010.65    0.463   287.08
2011.65    0.466   287.94
2012.65    0.469   288.79
2013.65    0.471   289.63
2014.65    0.474   290.46
2015.65    0.476   291.28
2016.65    0.479   292.10
2017.65    0.481   292.90
2018.65    0.483   293.70
2019.65    0.485   294.49
2020.65    0.487   295.28
2021.65    0.488   296.06
2022.65    0.490   296.83
2023.65    0.491   297.61
2024.65    0.492   298.37
2025.65    0.493   299.14
2026.65    0.494   299.90
2027.65    0.495   300.65
2028.65    0.496   301.41
2029.65    0.497   302.16
2030.65    0.497   302.91
2031.65    0.498   303.66
2032.65    0.498   304.41
2033.65    0.498   305.16
2034.65    0.498   305.90
2035.65    0.498   306.65
2036.65    0.498   307.40
2037.65    0.497   308.15
2038.65    0.497   308.90
2039.65    0.496   309.65
2040.65    0.495   310.41
2041.65    0.494   311.16
2042.65    0.494   311.92
2043.65    0.492   312.69
2044.65    0.491   313.45
2045.65    0.490   314.22
2046.65    0.488   315.00
2047.65    0.487   315.78
2048.65    0.485   316.56
2049.65    0.483   317.36
2050.65    0.481   318.15
2051.65    0.479   318.96
2052.65    0.477   319.77
2053.65    0.474   320.59
2054.65    0.472   321.42
2055.65    0.469   322.26
2056.65    0.466   323.11
2057.65    0.463   323.97
2058.65    0.460   324.84
2059.65    0.457   325.72
2060.65    0.454   326.61
2061.65    0.450   327.52
2062.65    0.446   328.44
2063.65    0.443   329.38
2064.65    0.439   330.34
2065.65    0.435   331.31
2066.65    0.430   332.30
2067.65    0.426   333.31
2068.65    0.422   334.34
2069.65    0.417   335.40
2070.65    0.412   336.48
2071.65    0.407   337.58
2072.65    0.402   338.71
2073.65    0.397   339.88
2074.65    0.391   341.07
2075.65    0.386   342.30
2076.65    0.380   343.56
2077.65    0.374   344.87
2078.65    0.368   346.22
2079.65    0.362   347.61
2080.65    0.355   349.05
2081.65    0.349   350.55
2082.65    0.342   352.11
2083.65    0.335   353.73
2084.65    0.328   355.42
2085.65    0.320   357.19
2086.65    0.313   359.04
2087.65    0.305     0.98
2088.65    0.297     3.03
2089.65    0.289     5.18
2090.65    0.281     7.47
2091.65    0.272     9.89
2092.65    0.264    12.47
2093.65    0.255    15.23
2094.65    0.246    18.18
2095.65    0.237    21.36
2096.65    0.228    24.79
2097.65    0.219    28.51
2098.65    0.209    32.57
2099.65    0.200    37.00
2100.65    0.190    41.87

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 18:46:38