Double Star Calculator - Orbit

Orbital Elements for HU898

WDS:	HU898	WDS ID/Discoverer
P:	128.250	Orbital period (years)
a:	0.323	Semi-major axis (arcseconds)
i:	38.7	Inclination (degrees)
Ω:	33.0	Longitude of ascending node (degrees)
T:	1984.630	Epoch of periastron passage (year)
e:	0.783	Eccentricity
ω:	108.9	Longitude of periastron (degrees)
Start-Year:	1960.875	Year
End-Year:	2089.125	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU898
Position:	135356.44-191005.1	Epoch-2000 right ascension and declination
WDS-ID:	13539-1910	WDS designation
Discoverer Code:	HU898	Discover designation and components
ADS number:	9043	Aitken Double Star catalog
HD number:	121137	HD catalog number
Hipparcos number:	67859	Hipparcos catalog number
V1:	8.70	Magnitude of the primary
V2:	9.23	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2011	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:	Doc2012a	Reference

Double Star Orbit for HU898

WDS 6th Orbit including measures of HU898

-- 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 HU898

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.413   310.60
--------------------------
1960.88    0.367   356.77
1961.88    0.360   357.85
1962.88    0.353   358.97
1963.88    0.345     0.14
1964.88    0.337     1.36
1965.88    0.329     2.65
1966.88    0.320     4.00
1967.88    0.311     5.43
1968.88    0.301     6.95
1969.88    0.291     8.57
1970.88    0.280    10.32
1971.88    0.268    12.21
1972.88    0.256    14.28
1973.88    0.243    16.56
1974.88    0.230    19.10
1975.88    0.215    21.98
1976.88    0.199    25.29
1977.88    0.182    29.20
1978.88    0.164    33.95
1979.88    0.144    39.96
1980.88    0.122    48.02
1981.88    0.099    59.76
1982.88    0.075    78.91
1983.88    0.058   112.56
1984.88    0.059   157.21
1985.88    0.076   189.91
1986.88    0.095   209.61
1987.88    0.114   222.69
1988.88    0.130   232.27
1989.88    0.145   239.80
1990.88    0.159   245.96
1991.88    0.172   251.18
1992.88    0.184   255.69
1993.88    0.195   259.66
1994.88    0.206   263.20
1995.88    0.216   266.40
1996.88    0.226   269.31
1997.88    0.236   271.98
1998.88    0.245   274.44
1999.88    0.254   276.73
2000.88    0.262   278.86
2001.88    0.271   280.86
2002.88    0.279   282.74
2003.88    0.287   284.52
2004.88    0.294   286.21
2005.88    0.302   287.81
2006.88    0.309   289.34
2007.88    0.316   290.80
2008.88    0.322   292.19
2009.88    0.329   293.54
2010.88    0.335   294.82
2011.88    0.341   296.07
2012.88    0.347   297.27
2013.88    0.353   298.42
2014.88    0.359   299.55
2015.88    0.364   300.63
2016.88    0.370   301.69
2017.88    0.375   302.71
2018.88    0.380   303.71
2019.88    0.385   304.69
2020.88    0.389   305.63
2021.88    0.394   306.56
2022.88    0.398   307.47
2023.88    0.403   308.35
2024.88    0.407   309.22
2025.88    0.411   310.07
2026.88    0.414   310.91
2027.88    0.418   311.73
2028.88    0.422   312.53
2029.88    0.425   313.33
2030.88    0.428   314.11
2031.88    0.432   314.88
2032.88    0.435   315.64
2033.88    0.437   316.38
2034.88    0.440   317.12
2035.88    0.443   317.85
2036.88    0.445   318.57
2037.88    0.448   319.29
2038.88    0.450   319.99
2039.88    0.452   320.69
2040.88    0.454   321.39
2041.88    0.456   322.07
2042.88    0.457   322.76
2043.88    0.459   323.43
2044.88    0.460   324.11
2045.88    0.461   324.78
2046.88    0.463   325.44
2047.88    0.464   326.11
2048.88    0.464   326.77
2049.88    0.465   327.42
2050.88    0.466   328.08
2051.88    0.466   328.73
2052.88    0.467   329.39
2053.88    0.467   330.04
2054.88    0.467   330.69
2055.88    0.467   331.35
2056.88    0.466   332.00
2057.88    0.466   332.65
2058.88    0.466   333.31
2059.88    0.465   333.96
2060.88    0.464   334.62
2061.88    0.463   335.29
2062.88    0.462   335.95
2063.88    0.461   336.62
2064.88    0.459   337.29
2065.88    0.458   337.97
2066.88    0.456   338.65
2067.88    0.454   339.33
2068.88    0.452   340.03
2069.88    0.450   340.73
2070.88    0.447   341.43
2071.88    0.445   342.15
2072.88    0.442   342.87
2073.88    0.439   343.60
2074.88    0.436   344.35
2075.88    0.432   345.10
2076.88    0.429   345.87
2077.88    0.425   346.65
2078.88    0.421   347.44
2079.88    0.417   348.25
2080.88    0.413   349.08
2081.88    0.408   349.92
2082.88    0.403   350.79
2083.88    0.398   351.67
2084.88    0.393   352.58
2085.88    0.387   353.52
2086.88    0.381   354.48
2087.88    0.375   355.48
2088.88    0.368   356.51

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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 16:59:58