Double Star Calculator - Orbit

Orbital Elements for BU394AB

WDS:	BU394AB	WDS ID/Discoverer
P:	142.140	Orbital period (years)
a:	0.689	Semi-major axis (arcseconds)
i:	78.0	Inclination (degrees)
Ω:	102.1	Longitude of ascending node (degrees)
T:	1992.370	Epoch of periastron passage (year)
e:	0.847	Eccentricity
ω:	2.0	Longitude of periastron (degrees)
Start-Year:	1953.93	Year
End-Year:	2096.07	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU394AB
Position:	003045.56+473147.5	Epoch-2000 right ascension and declination
WDS-ID:	00308+4732	WDS designation
Discoverer Code:	BU394AB	Discover designation and components
ADS number:	416	Aitken Double Star catalog
HD number:	2675	HD catalog number
Hipparcos number:	2414	Hipparcos catalog number
V1:	8.49	Magnitude of the primary
V2:	8.77	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1991	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Zul1997b	Reference

Double Star Orbit for BU394AB

WDS 6th Orbit including measures of BU394AB

-- 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 BU394AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.998   278.97
--------------------------
1953.93    1.045   285.58
1954.93    1.030   285.70
1955.93    1.015   285.83
1956.93    0.999   285.96
1957.93    0.983   286.10
1958.93    0.967   286.24
1959.93    0.949   286.38
1960.93    0.931   286.53
1961.93    0.913   286.69
1962.93    0.894   286.85
1963.93    0.874   287.02
1964.93    0.854   287.20
1965.93    0.833   287.38
1966.93    0.811   287.58
1967.93    0.788   287.79
1968.93    0.765   288.01
1969.93    0.741   288.24
1970.93    0.716   288.49
1971.93    0.690   288.76
1972.93    0.664   289.05
1973.93    0.636   289.37
1974.93    0.608   289.71
1975.93    0.578   290.09
1976.93    0.547   290.51
1977.93    0.516   290.98
1978.93    0.483   291.51
1979.93    0.448   292.13
1980.93    0.412   292.85
1981.93    0.375   293.71
1982.93    0.336   294.76
1983.93    0.295   296.10
1984.93    0.253   297.87
1985.93    0.208   300.39
1986.93    0.162   304.34
1987.93    0.114   311.57
1988.93    0.067   329.23
1989.93    0.041    25.85
1990.93    0.069    78.99
1991.93    0.102    97.16
1992.93    0.096   109.73
1993.93    0.056   134.03
1994.93    0.042   206.72
1995.93    0.084   246.55
1996.93    0.135   258.19
1997.93    0.186   263.46
1998.93    0.233   266.52
1999.93    0.279   268.56
2000.93    0.322   270.04
2001.93    0.363   271.17
2002.93    0.403   272.08
2003.93    0.440   272.83
2004.93    0.476   273.46
2005.93    0.511   274.01
2006.93    0.544   274.49
2007.93    0.575   274.91
2008.93    0.606   275.29
2009.93    0.635   275.64
2010.93    0.664   275.95
2011.93    0.691   276.24
2012.93    0.717   276.51
2013.93    0.743   276.76
2014.93    0.767   276.99
2015.93    0.791   277.21
2016.93    0.814   277.42
2017.93    0.836   277.61
2018.93    0.858   277.80
2019.93    0.878   277.97
2020.93    0.898   278.14
2021.93    0.918   278.30
2022.93    0.936   278.46
2023.93    0.954   278.61
2024.93    0.972   278.75
2025.93    0.989   278.89
2026.93    1.005   279.02
2027.93    1.020   279.15
2028.93    1.036   279.28
2029.93    1.050   279.40
2030.93    1.064   279.52
2031.93    1.078   279.63
2032.93    1.091   279.75
2033.93    1.103   279.86
2034.93    1.115   279.97
2035.93    1.127   280.07
2036.93    1.138   280.18
2037.93    1.148   280.28
2038.93    1.158   280.38
2039.93    1.168   280.48
2040.93    1.177   280.57
2041.93    1.186   280.67
2042.93    1.194   280.76
2043.93    1.202   280.85
2044.93    1.209   280.95
2045.93    1.216   281.04
2046.93    1.223   281.13
2047.93    1.229   281.21
2048.93    1.234   281.30
2049.93    1.240   281.39
2050.93    1.245   281.47
2051.93    1.249   281.56
2052.93    1.253   281.64
2053.93    1.257   281.73
2054.93    1.260   281.81
2055.93    1.263   281.90
2056.93    1.265   281.98
2057.93    1.267   282.06
2058.93    1.269   282.15
2059.93    1.270   282.23
2060.93    1.271   282.31
2061.93    1.272   282.39
2062.93    1.272   282.47
2063.93    1.272   282.56
2064.93    1.271   282.64
2065.93    1.270   282.72
2066.93    1.268   282.80
2067.93    1.267   282.89
2068.93    1.264   282.97
2069.93    1.262   283.05
2070.93    1.259   283.14
2071.93    1.255   283.22
2072.93    1.251   283.30
2073.93    1.247   283.39
2074.93    1.243   283.48
2075.93    1.237   283.56
2076.93    1.232   283.65
2077.93    1.226   283.74
2078.93    1.220   283.83
2079.93    1.213   283.92
2080.93    1.206   284.01
2081.93    1.199   284.10
2082.93    1.191   284.19
2083.93    1.182   284.29
2084.93    1.174   284.38
2085.93    1.164   284.48
2086.93    1.155   284.58
2087.93    1.144   284.68
2088.93    1.134   284.78
2089.93    1.123   284.89
2090.93    1.111   284.99
2091.93    1.099   285.10
2092.93    1.087   285.21
2093.93    1.074   285.33
2094.93    1.061   285.44
2095.93    1.047   285.56

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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 14:39:55