Double Star Calculator - Orbit

Orbital Elements for HU640AB

WDS:	HU640AB	WDS ID/Discoverer
P:	124.280	Orbital period (years)
a:	0.62	Semi-major axis (arcseconds)
i:	54.8	Inclination (degrees)
Ω:	286.3	Longitude of ascending node (degrees)
T:	1911.280	Epoch of periastron passage (year)
e:	0.387	Eccentricity
ω:	46.9	Longitude of periastron (degrees)
Start-Year:	1962.86	Year
End-Year:	2087.14	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU640AB
Position:	125041.87+203204.9	Epoch-2000 right ascension and declination
WDS-ID:	12507+2032	WDS designation
Discoverer Code:	HU640AB	Discover designation and components
ADS number:	8680	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	62686	Hipparcos catalog number
V1:	10.19	Magnitude of the primary
V2:	9.91	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 HU640AB

WDS 6th Orbit including measures of HU640AB

-- 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 HU640AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.432   279.66
--------------------------
1962.86    0.759   126.13
1963.86    0.755   127.17
1964.86    0.750   128.21
1965.86    0.744   129.27
1966.86    0.739   130.35
1967.86    0.732   131.44
1968.86    0.726   132.55
1969.86    0.719   133.69
1970.86    0.711   134.85
1971.86    0.703   136.03
1972.86    0.695   137.24
1973.86    0.686   138.48
1974.86    0.677   139.76
1975.86    0.668   141.06
1976.86    0.659   142.41
1977.86    0.649   143.79
1978.86    0.639   145.22
1979.86    0.628   146.70
1980.86    0.618   148.22
1981.86    0.607   149.80
1982.86    0.597   151.43
1983.86    0.586   153.12
1984.86    0.575   154.88
1985.86    0.564   156.71
1986.86    0.553   158.61
1987.86    0.542   160.58
1988.86    0.531   162.63
1989.86    0.521   164.77
1990.86    0.510   167.00
1991.86    0.500   169.32
1992.86    0.490   171.74
1993.86    0.480   174.25
1994.86    0.471   176.87
1995.86    0.462   179.59
1996.86    0.454   182.41
1997.86    0.446   185.34
1998.86    0.439   188.36
1999.86    0.432   191.49
2000.86    0.426   194.70
2001.86    0.421   198.00
2002.86    0.417   201.38
2003.86    0.413   204.82
2004.86    0.410   208.31
2005.86    0.408   211.85
2006.86    0.407   215.41
2007.86    0.407   218.99
2008.86    0.407   222.56
2009.86    0.408   226.13
2010.86    0.410   229.66
2011.86    0.412   233.16
2012.86    0.415   236.62
2013.86    0.418   240.03
2014.86    0.422   243.39
2015.86    0.425   246.68
2016.86    0.429   249.93
2017.86    0.433   253.11
2018.86    0.436   256.25
2019.86    0.439   259.35
2020.86    0.441   262.41
2021.86    0.442   265.45
2022.86    0.442   268.48
2023.86    0.441   271.51
2024.86    0.439   274.56
2025.86    0.436   277.65
2026.86    0.430   280.80
2027.86    0.423   284.05
2028.86    0.414   287.43
2029.86    0.402   290.99
2030.86    0.389   294.77
2031.86    0.374   298.84
2032.86    0.357   303.28
2033.86    0.338   308.18
2034.86    0.319   313.67
2035.86    0.299   319.88
2036.86    0.280   326.94
2037.86    0.263   334.98
2038.86    0.249   344.03
2039.86    0.239   354.00
2040.86    0.235     4.58
2041.86    0.236    15.28
2042.86    0.244    25.58
2043.86    0.257    35.06
2044.86    0.274    43.49
2045.86    0.294    50.85
2046.86    0.317    57.20
2047.86    0.341    62.68
2048.86    0.366    67.42
2049.86    0.391    71.55
2050.86    0.416    75.19
2051.86    0.441    78.41
2052.86    0.465    81.30
2053.86    0.489    83.90
2054.86    0.511    86.27
2055.86    0.533    88.44
2056.86    0.554    90.45
2057.86    0.574    92.31
2058.86    0.592    94.05
2059.86    0.610    95.69
2060.86    0.627    97.23
2061.86    0.643    98.70
2062.86    0.658   100.10
2063.86    0.671   101.44
2064.86    0.684   102.73
2065.86    0.696   103.97
2066.86    0.707   105.17
2067.86    0.717   106.34
2068.86    0.726   107.48
2069.86    0.734   108.59
2070.86    0.742   109.67
2071.86    0.748   110.74
2072.86    0.754   111.79
2073.86    0.759   112.82
2074.86    0.763   113.84
2075.86    0.767   114.86
2076.86    0.769   115.86
2077.86    0.771   116.86
2078.86    0.773   117.85
2079.86    0.773   118.84
2080.86    0.773   119.83
2081.86    0.772   120.82
2082.86    0.771   121.81
2083.86    0.769   122.81
2084.86    0.767   123.81
2085.86    0.764   124.82
2086.86    0.760   125.84

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 16:50:20