Double Star Calculator - Orbit

Orbital Elements for BU178

WDS:	BU178	WDS ID/Discoverer
P:	106.000	Orbital period (years)
a:	0.394	Semi-major axis (arcseconds)
i:	82.2	Inclination (degrees)
Ω:	140.8	Longitude of ascending node (degrees)
T:	1944.210	Epoch of periastron passage (year)
e:	0.743	Eccentricity
ω:	2.2	Longitude of periastron (degrees)
Start-Year:	1972.0	Year
End-Year:	2078.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU178
Position:	225510.96-045916.4	Epoch-2000 right ascension and declination
WDS-ID:	22552-0459	WDS designation
Discoverer Code:	BU178	Discover designation and components
ADS number:	16365	Aitken Double Star catalog
HD number:	216718	HD catalog number
Hipparcos number:	113184	Hipparcos catalog number
V1:	6.03	Magnitude of the primary
V2:	7.75	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Tok2017c	Reference

Double Star Orbit for BU178

WDS 6th Orbit including measures of BU178

-- 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 BU178

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.470   324.95
--------------------------
1972.00    0.543   318.12
1973.00    0.555   318.28
1974.00    0.567   318.43
1975.00    0.577   318.58
1976.00    0.588   318.72
1977.00    0.597   318.85
1978.00    0.607   318.99
1979.00    0.615   319.11
1980.00    0.623   319.24
1981.00    0.631   319.36
1982.00    0.638   319.48
1983.00    0.645   319.60
1984.00    0.651   319.71
1985.00    0.656   319.82
1986.00    0.661   319.93
1987.00    0.666   320.04
1988.00    0.670   320.15
1989.00    0.674   320.25
1990.00    0.677   320.36
1991.00    0.680   320.46
1992.00    0.682   320.57
1993.00    0.684   320.67
1994.00    0.685   320.77
1995.00    0.686   320.87
1996.00    0.686   320.98
1997.00    0.686   321.08
1998.00    0.686   321.18
1999.00    0.685   321.28
2000.00    0.684   321.38
2001.00    0.682   321.49
2002.00    0.679   321.59
2003.00    0.677   321.69
2004.00    0.673   321.80
2005.00    0.670   321.90
2006.00    0.666   322.01
2007.00    0.661   322.12
2008.00    0.656   322.23
2009.00    0.651   322.34
2010.00    0.645   322.46
2011.00    0.638   322.57
2012.00    0.631   322.69
2013.00    0.624   322.81
2014.00    0.616   322.94
2015.00    0.607   323.07
2016.00    0.598   323.20
2017.00    0.589   323.34
2018.00    0.579   323.48
2019.00    0.568   323.62
2020.00    0.557   323.77
2021.00    0.545   323.93
2022.00    0.533   324.10
2023.00    0.520   324.27
2024.00    0.507   324.45
2025.00    0.492   324.64
2026.00    0.478   324.85
2027.00    0.462   325.06
2028.00    0.446   325.29
2029.00    0.430   325.54
2030.00    0.412   325.81
2031.00    0.394   326.11
2032.00    0.375   326.43
2033.00    0.355   326.79
2034.00    0.334   327.20
2035.00    0.313   327.65
2036.00    0.290   328.18
2037.00    0.267   328.80
2038.00    0.243   329.54
2039.00    0.217   330.44
2040.00    0.191   331.60
2041.00    0.163   333.14
2042.00    0.134   335.32
2043.00    0.105   338.73
2044.00    0.074   344.91
2045.00    0.044   359.54
2046.00    0.025    48.51
2047.00    0.039   108.34
2048.00    0.066   127.13
2049.00    0.090   135.02
2050.00    0.101   140.12
2051.00    0.093   145.03
2052.00    0.070   152.21
2053.00    0.040   169.13
2054.00    0.023   230.61
2055.00    0.044   284.30
2056.00    0.076   298.62
2057.00    0.108   304.45
2058.00    0.139   307.62
2059.00    0.169   309.65
2060.00    0.198   311.08
2061.00    0.225   312.15
2062.00    0.252   312.99
2063.00    0.277   313.68
2064.00    0.301   314.25
2065.00    0.323   314.75
2066.00    0.345   315.18
2067.00    0.366   315.55
2068.00    0.386   315.89
2069.00    0.405   316.20
2070.00    0.423   316.48
2071.00    0.441   316.73
2072.00    0.458   316.97
2073.00    0.474   317.19
2074.00    0.489   317.40
2075.00    0.503   317.59
2076.00    0.517   317.78
2077.00    0.531   317.95

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 18:45:13