Double Star Calculator - Orbit

Orbital Elements for BU1186

WDS:	BU1186	WDS ID/Discoverer
P:	160.590	Orbital period (years)
a:	0.401	Semi-major axis (arcseconds)
i:	118.6	Inclination (degrees)
Ω:	5.4	Longitude of ascending node (degrees)
T:	2005.800	Epoch of periastron passage (year)
e:	0.74	Eccentricity
ω:	27.3	Longitude of periastron (degrees)
Start-Year:	1944.705	Year
End-Year:	2105.295	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1186
Position:	042728.77+111244.4	Epoch-2000 right ascension and declination
WDS-ID:	04275+1113	WDS designation
Discoverer Code:	BU1186	Discover designation and components
ADS number:	3228	Aitken Double Star catalog
HD number:	28217	HD catalog number
Hipparcos number:	20804	Hipparcos catalog number
V1:	6.07	Magnitude of the primary
V2:	7.94	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:	Ole2005a	Reference

Double Star Orbit for BU1186

WDS 6th Orbit including measures of BU1186

-- 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 BU1186

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.383   193.11
--------------------------
1944.70    0.568   165.48
1945.70    0.563   165.12
1946.70    0.557   164.75
1947.70    0.551   164.37
1948.70    0.546   163.98
1949.70    0.540   163.59
1950.70    0.533   163.19
1951.70    0.527   162.77
1952.70    0.521   162.35
1953.70    0.514   161.92
1954.70    0.507   161.47
1955.70    0.500   161.01
1956.70    0.493   160.54
1957.70    0.486   160.06
1958.70    0.478   159.56
1959.70    0.470   159.04
1960.70    0.463   158.51
1961.70    0.455   157.96
1962.70    0.446   157.39
1963.70    0.438   156.79
1964.70    0.430   156.18
1965.70    0.421   155.54
1966.70    0.412   154.87
1967.70    0.403   154.17
1968.70    0.394   153.44
1969.70    0.384   152.67
1970.70    0.375   151.86
1971.70    0.365   151.02
1972.70    0.355   150.12
1973.70    0.345   149.18
1974.70    0.335   148.18
1975.70    0.325   147.11
1976.70    0.314   145.97
1977.70    0.304   144.76
1978.70    0.293   143.46
1979.70    0.282   142.05
1980.70    0.271   140.54
1981.70    0.260   138.89
1982.70    0.249   137.10
1983.70    0.238   135.14
1984.70    0.226   132.98
1985.70    0.215   130.59
1986.70    0.204   127.95
1987.70    0.193   124.99
1988.70    0.182   121.68
1989.70    0.171   117.95
1990.70    0.161   113.73
1991.70    0.151   108.95
1992.70    0.142   103.53
1993.70    0.134    97.41
1994.70    0.127    90.55
1995.70    0.121    82.95
1996.70    0.117    74.70
1997.70    0.114    65.96
1998.70    0.113    56.95
1999.70    0.114    47.89
2000.70    0.115    38.98
2001.70    0.116    30.28
2002.70    0.117    21.73
2003.70    0.114    13.06
2004.70    0.108     3.74
2005.70    0.097   352.72
2006.70    0.082   338.11
2007.70    0.068   317.08
2008.70    0.063   289.11
2009.70    0.070   261.98
2010.70    0.087   242.75
2011.70    0.108   230.41
2012.70    0.131   222.22
2013.70    0.154   216.47
2014.70    0.176   212.18
2015.70    0.198   208.86
2016.70    0.219   206.17
2017.70    0.239   203.95
2018.70    0.258   202.07
2019.70    0.276   200.44
2020.70    0.294   199.01
2021.70    0.311   197.74
2022.70    0.327   196.60
2023.70    0.343   195.57
2024.70    0.358   194.62
2025.70    0.372   193.75
2026.70    0.386   192.95
2027.70    0.399   192.19
2028.70    0.412   191.49
2029.70    0.425   190.83
2030.70    0.436   190.20
2031.70    0.448   189.61
2032.70    0.459   189.04
2033.70    0.469   188.50
2034.70    0.479   187.99
2035.70    0.489   187.49
2036.70    0.498   187.01
2037.70    0.507   186.56
2038.70    0.516   186.11
2039.70    0.524   185.68
2040.70    0.532   185.27
2041.70    0.540   184.86
2042.70    0.547   184.47
2043.70    0.554   184.09
2044.70    0.561   183.72
2045.70    0.568   183.35
2046.70    0.574   182.99
2047.70    0.580   182.65
2048.70    0.585   182.30
2049.70    0.591   181.97
2050.70    0.596   181.64
2051.70    0.601   181.31
2052.70    0.605   180.99
2053.70    0.610   180.68
2054.70    0.614   180.37
2055.70    0.618   180.06
2056.70    0.621   179.76
2057.70    0.625   179.46
2058.70    0.628   179.17
2059.70    0.631   178.87
2060.70    0.634   178.58
2061.70    0.636   178.29
2062.70    0.638   178.01
2063.70    0.641   177.72
2064.70    0.643   177.44
2065.70    0.644   177.16
2066.70    0.646   176.88
2067.70    0.647   176.61
2068.70    0.648   176.33
2069.70    0.649   176.05
2070.70    0.650   175.78
2071.70    0.651   175.50
2072.70    0.651   175.23
2073.70    0.651   174.96
2074.70    0.651   174.68
2075.70    0.651   174.41
2076.70    0.651   174.13
2077.70    0.650   173.86
2078.70    0.649   173.58
2079.70    0.648   173.31
2080.70    0.647   173.03
2081.70    0.646   172.76
2082.70    0.645   172.48
2083.70    0.643   172.20
2084.70    0.641   171.92
2085.70    0.639   171.63
2086.70    0.637   171.35
2087.70    0.635   171.06
2088.70    0.633   170.77
2089.70    0.630   170.48
2090.70    0.627   170.19
2091.70    0.624   169.89
2092.70    0.621   169.59
2093.70    0.618   169.29
2094.70    0.615   168.98
2095.70    0.611   168.67
2096.70    0.607   168.36
2097.70    0.603   168.05
2098.70    0.599   167.72
2099.70    0.595   167.40
2100.70    0.590   167.07
2101.70    0.586   166.73
2102.70    0.581   166.39
2103.70    0.576   166.04
2104.70    0.571   165.69

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 15:24:17