Double Star Calculator - Orbit

Orbital Elements for HO566

WDS:	HO566	WDS ID/Discoverer
P:	119.870	Orbital period (years)
a:	0.376	Semi-major axis (arcseconds)
i:	105.2	Inclination (degrees)
Ω:	154.1	Longitude of ascending node (degrees)
T:	1968.650	Epoch of periastron passage (year)
e:	0.784	Eccentricity
ω:	223.7	Longitude of periastron (degrees)
Start-Year:	1965.065	Year
End-Year:	2084.935	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HO566
Position:	182333.28-261017.6	Epoch-2000 right ascension and declination
WDS-ID:	18236-2610	WDS designation
Discoverer Code:	HO566	Discover designation and components
ADS number:	11296	Aitken Double Star catalog
HD number:	168991	HD catalog number
Hipparcos number:	90128	Hipparcos catalog number
V1:	7.97	Magnitude of the primary
V2:	9.55	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	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:	USN2017b	Reference

Double Star Orbit for HO566

WDS 6th Orbit including measures of HO566

-- 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 HO566

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.508   140.60
--------------------------
1965.07    0.104   350.04
1966.07    0.104   343.70
1967.07    0.098   337.06
1968.07    0.079   328.39
1969.07    0.045   309.60
1970.07    0.026   229.56
1971.07    0.061   181.20
1972.07    0.101   169.95
1973.07    0.138   165.00
1974.07    0.171   162.07
1975.07    0.201   160.06
1976.07    0.228   158.56
1977.07    0.253   157.36
1978.07    0.275   156.37
1979.07    0.296   155.52
1980.07    0.316   154.79
1981.07    0.334   154.13
1982.07    0.350   153.54
1983.07    0.366   153.00
1984.07    0.380   152.50
1985.07    0.394   152.04
1986.07    0.406   151.61
1987.07    0.418   151.20
1988.07    0.429   150.82
1989.07    0.439   150.45
1990.07    0.449   150.10
1991.07    0.458   149.76
1992.07    0.466   149.44
1993.07    0.474   149.13
1994.07    0.481   148.82
1995.07    0.487   148.53
1996.07    0.494   148.24
1997.07    0.499   147.96
1998.07    0.505   147.69
1999.07    0.509   147.42
2000.07    0.514   147.15
2001.07    0.518   146.89
2002.07    0.521   146.64
2003.07    0.524   146.38
2004.07    0.527   146.13
2005.07    0.529   145.89
2006.07    0.531   145.64
2007.07    0.533   145.40
2008.07    0.535   145.15
2009.07    0.536   144.91
2010.07    0.536   144.67
2011.07    0.537   144.43
2012.07    0.537   144.19
2013.07    0.537   143.95
2014.07    0.536   143.71
2015.07    0.536   143.47
2016.07    0.535   143.23
2017.07    0.533   142.99
2018.07    0.532   142.75
2019.07    0.530   142.50
2020.07    0.528   142.25
2021.07    0.525   142.00
2022.07    0.523   141.75
2023.07    0.520   141.50
2024.07    0.517   141.24
2025.07    0.514   140.98
2026.07    0.510   140.72
2027.07    0.506   140.45
2028.07    0.502   140.18
2029.07    0.498   139.90
2030.07    0.493   139.62
2031.07    0.489   139.33
2032.07    0.484   139.04
2033.07    0.478   138.74
2034.07    0.473   138.44
2035.07    0.467   138.12
2036.07    0.462   137.80
2037.07    0.456   137.48
2038.07    0.449   137.14
2039.07    0.443   136.79
2040.07    0.436   136.43
2041.07    0.429   136.06
2042.07    0.422   135.68
2043.07    0.415   135.29
2044.07    0.407   134.88
2045.07    0.400   134.45
2046.07    0.392   134.01
2047.07    0.383   133.55
2048.07    0.375   133.07
2049.07    0.367   132.57
2050.07    0.358   132.04
2051.07    0.349   131.49
2052.07    0.340   130.91
2053.07    0.330   130.29
2054.07    0.321   129.64
2055.07    0.311   128.95
2056.07    0.301   128.21
2057.07    0.291   127.42
2058.07    0.281   126.58
2059.07    0.271   125.67
2060.07    0.260   124.69
2061.07    0.249   123.62
2062.07    0.238   122.46
2063.07    0.227   121.18
2064.07    0.216   119.77
2065.07    0.205   118.21
2066.07    0.193   116.46
2067.07    0.182   114.50
2068.07    0.170   112.27
2069.07    0.159   109.71
2070.07    0.148   106.76
2071.07    0.136   103.33
2072.07    0.125    99.29
2073.07    0.115    94.49
2074.07    0.105    88.77
2075.07    0.096    81.95
2076.07    0.089    73.86
2077.07    0.083    64.46
2078.07    0.079    53.93
2079.07    0.078    42.74
2080.07    0.079    31.56
2081.07    0.083    21.03
2082.07    0.088    11.55
2083.07    0.094     3.20
2084.07    0.100   355.84

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 17:51:23