Double Star Calculator - Orbit

Orbital Elements for HU391AB

WDS:	HU391AB	WDS ID/Discoverer
P:	141.110	Orbital period (years)
a:	0.675	Semi-major axis (arcseconds)
i:	60.1	Inclination (degrees)
Ω:	181.3	Longitude of ascending node (degrees)
T:	2013.050	Epoch of periastron passage (year)
e:	0.635	Eccentricity
ω:	192.4	Longitude of periastron (degrees)
Start-Year:	1954.445	Year
End-Year:	2095.555	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU391AB
Position:	223727.03+235616.5	Epoch-2000 right ascension and declination
WDS-ID:	22375+2356	WDS designation
Discoverer Code:	HU391AB	Discover designation and components
ADS number:	16116	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	111680	Hipparcos catalog number
V1:	9.71	Magnitude of the primary
V2:	10.46	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2011	Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Gur2018	Reference

Double Star Orbit for HU391AB

WDS 6th Orbit including measures of HU391AB

-- 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 HU391AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.351   143.19
--------------------------
1954.44    1.026   192.32
1955.44    1.018   192.75
1956.44    1.010   193.18
1957.44    1.001   193.62
1958.44    0.992   194.07
1959.44    0.983   194.53
1960.44    0.973   195.00
1961.44    0.962   195.48
1962.44    0.951   195.97
1963.44    0.940   196.47
1964.44    0.928   196.98
1965.44    0.916   197.51
1966.44    0.903   198.05
1967.44    0.890   198.61
1968.44    0.877   199.18
1969.44    0.863   199.77
1970.44    0.848   200.38
1971.44    0.834   201.02
1972.44    0.818   201.67
1973.44    0.802   202.35
1974.44    0.786   203.06
1975.44    0.769   203.80
1976.44    0.752   204.58
1977.44    0.734   205.39
1978.44    0.716   206.24
1979.44    0.698   207.13
1980.44    0.679   208.08
1981.44    0.659   209.08
1982.44    0.639   210.14
1983.44    0.619   211.27
1984.44    0.598   212.48
1985.44    0.577   213.78
1986.44    0.555   215.17
1987.44    0.533   216.68
1988.44    0.511   218.33
1989.44    0.488   220.12
1990.44    0.466   222.09
1991.44    0.442   224.26
1992.44    0.419   226.67
1993.44    0.396   229.37
1994.44    0.373   232.40
1995.44    0.350   235.83
1996.44    0.328   239.74
1997.44    0.306   244.21
1998.44    0.285   249.35
1999.44    0.266   255.25
2000.44    0.249   262.00
2001.44    0.235   269.66
2002.44    0.224   278.19
2003.44    0.217   287.42
2004.44    0.214   297.09
2005.44    0.215   306.83
2006.44    0.220   316.30
2007.44    0.227   325.25
2008.44    0.236   333.60
2009.44    0.244   341.38
2010.44    0.249   348.72
2011.44    0.251   355.85
2012.44    0.247     3.04
2013.44    0.238    10.63
2014.44    0.223    19.05
2015.44    0.206    28.79
2016.44    0.188    40.36
2017.44    0.175    54.00
2018.44    0.169    69.25
2019.44    0.172    84.77
2020.44    0.185    98.95
2021.44    0.205   110.87
2022.44    0.229   120.44
2023.44    0.258   128.02
2024.44    0.287   134.07
2025.44    0.318   138.97
2026.44    0.349   142.99
2027.44    0.380   146.36
2028.44    0.411   149.23
2029.44    0.441   151.70
2030.44    0.470   153.86
2031.44    0.499   155.77
2032.44    0.526   157.48
2033.44    0.553   159.01
2034.44    0.580   160.41
2035.44    0.605   161.68
2036.44    0.630   162.86
2037.44    0.654   163.94
2038.44    0.677   164.96
2039.44    0.699   165.90
2040.44    0.721   166.79
2041.44    0.742   167.63
2042.44    0.762   168.42
2043.44    0.781   169.17
2044.44    0.800   169.89
2045.44    0.818   170.57
2046.44    0.835   171.23
2047.44    0.852   171.86
2048.44    0.868   172.46
2049.44    0.883   173.05
2050.44    0.898   173.61
2051.44    0.912   174.16
2052.44    0.925   174.69
2053.44    0.938   175.21
2054.44    0.951   175.71
2055.44    0.963   176.20
2056.44    0.974   176.67
2057.44    0.984   177.14
2058.44    0.994   177.60
2059.44    1.004   178.05
2060.44    1.013   178.49
2061.44    1.022   178.92
2062.44    1.030   179.34
2063.44    1.037   179.76
2064.44    1.044   180.18
2065.44    1.050   180.58
2066.44    1.056   180.99
2067.44    1.062   181.39
2068.44    1.067   181.78
2069.44    1.071   182.17
2070.44    1.075   182.56
2071.44    1.079   182.95
2072.44    1.082   183.33
2073.44    1.084   183.71
2074.44    1.086   184.09
2075.44    1.088   184.47
2076.44    1.089   184.85
2077.44    1.090   185.23
2078.44    1.090   185.60
2079.44    1.090   185.98
2080.44    1.089   186.36
2081.44    1.088   186.74
2082.44    1.087   187.11
2083.44    1.085   187.49
2084.44    1.082   187.88
2085.44    1.079   188.26
2086.44    1.076   188.64
2087.44    1.072   189.03
2088.44    1.068   189.42
2089.44    1.063   189.82
2090.44    1.058   190.21
2091.44    1.053   190.62
2092.44    1.047   191.02
2093.44    1.041   191.43
2094.44    1.034   191.85
2095.44    1.026   192.27

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 18:42:11