Double Star Calculator - Orbit

Orbital Elements for HU1055AB

WDS:	HU1055AB	WDS ID/Discoverer
P:	100.500	Orbital period (years)
a:	0.442	Semi-major axis (arcseconds)
i:	126.0	Inclination (degrees)
Ω:	227.0	Longitude of ascending node (degrees)
T:	1991.300	Epoch of periastron passage (year)
e:	0.975	Eccentricity
ω:	286.0	Longitude of periastron (degrees)
Start-Year:	1974.75	Year
End-Year:	2075.25	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU1055AB
Position:	031507.58+161812.9	Epoch-2000 right ascension and declination
WDS-ID:	03151+1618	WDS designation
Discoverer Code:	HU1055AB	Discover designation and components
ADS number:	2429	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	15134	Hipparcos catalog number
V1:	9.4	Magnitude of the primary
V2:	9.9	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1996	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:	Hrt2000a	Reference

Double Star Orbit for HU1055AB

WDS 6th Orbit including measures of HU1055AB

-- 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 HU1055AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.506   115.86
--------------------------
1974.75    0.406    98.84
1975.75    0.395    98.27
1976.75    0.383    97.67
1977.75    0.371    97.03
1978.75    0.357    96.34
1979.75    0.343    95.59
1980.75    0.328    94.78
1981.75    0.312    93.89
1982.75    0.295    92.90
1983.75    0.277    91.78
1984.75    0.257    90.49
1985.75    0.235    88.97
1986.75    0.211    87.13
1987.75    0.184    84.77
1988.75    0.152    81.52
1989.75    0.115    76.35
1990.75    0.062    64.02
1991.75    0.043   186.53
1992.75    0.082   161.69
1993.75    0.113   151.98
1994.75    0.140   146.23
1995.75    0.164   142.24
1996.75    0.186   139.24
1997.75    0.206   136.84
1998.75    0.225   134.87
1999.75    0.242   133.19
2000.75    0.259   131.74
2001.75    0.275   130.46
2002.75    0.290   129.32
2003.75    0.305   128.28
2004.75    0.318   127.34
2005.75    0.331   126.47
2006.75    0.344   125.67
2007.75    0.356   124.93
2008.75    0.367   124.23
2009.75    0.378   123.57
2010.75    0.389   122.95
2011.75    0.399   122.36
2012.75    0.409   121.80
2013.75    0.418   121.26
2014.75    0.427   120.75
2015.75    0.435   120.26
2016.75    0.444   119.79
2017.75    0.451   119.33
2018.75    0.459   118.89
2019.75    0.466   118.46
2020.75    0.473   118.05
2021.75    0.479   117.64
2022.75    0.485   117.25
2023.75    0.491   116.87
2024.75    0.497   116.49
2025.75    0.502   116.13
2026.75    0.507   115.77
2027.75    0.512   115.42
2028.75    0.516   115.07
2029.75    0.520   114.73
2030.75    0.524   114.39
2031.75    0.528   114.06
2032.75    0.531   113.74
2033.75    0.534   113.42
2034.75    0.537   113.10
2035.75    0.539   112.78
2036.75    0.542   112.47
2037.75    0.544   112.16
2038.75    0.545   111.85
2039.75    0.547   111.54
2040.75    0.548   111.24
2041.75    0.549   110.93
2042.75    0.550   110.63
2043.75    0.550   110.33
2044.75    0.550   110.03
2045.75    0.550   109.73
2046.75    0.550   109.42
2047.75    0.549   109.12
2048.75    0.548   108.82
2049.75    0.547   108.51
2050.75    0.545   108.20
2051.75    0.544   107.90
2052.75    0.542   107.59
2053.75    0.539   107.27
2054.75    0.537   106.96
2055.75    0.534   106.64
2056.75    0.531   106.32
2057.75    0.527   105.99
2058.75    0.523   105.66
2059.75    0.519   105.32
2060.75    0.515   104.98
2061.75    0.510   104.63
2062.75    0.505   104.28
2063.75    0.499   103.91
2064.75    0.493   103.54
2065.75    0.487   103.16
2066.75    0.480   102.77
2067.75    0.473   102.37
2068.75    0.466   101.95
2069.75    0.458   101.53
2070.75    0.450   101.08
2071.75    0.441   100.62
2072.75    0.432   100.14
2073.75    0.422    99.64
2074.75    0.412    99.11

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 15:08:59