Double Star Calculator - Orbit

Orbital Elements for BU495AB

WDS:	BU495AB	WDS ID/Discoverer
P:	143.628	Orbital period (years)
a:	0.617	Semi-major axis (arcseconds)
i:	107.4	Inclination (degrees)
Ω:	31.3	Longitude of ascending node (degrees)
T:	1979.856	Epoch of periastron passage (year)
e:	0.5	Eccentricity
ω:	338.1	Longitude of periastron (degrees)
Start-Year:	1953.186	Year
End-Year:	2096.814	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU495AB
Position:	004844.81+184107.9	Epoch-2000 right ascension and declination
WDS-ID:	00487+1841	WDS designation
Discoverer Code:	BU495AB	Discover designation and components
ADS number:	673	Aitken Double Star catalog
HD number:	4655	HD catalog number
Hipparcos number:	3795	Hipparcos catalog number
V1:	8.34	Magnitude of the primary
V2:	8.61	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1998	Date of last observation
Orbit grade:	2	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Sca2000b	Reference

Double Star Orbit for BU495AB

WDS 6th Orbit including measures of BU495AB

-- 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 BU495AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.595   229.54
--------------------------
1953.19    0.549   200.08
1954.19    0.526   199.23
1955.19    0.503   198.29
1956.19    0.479   197.27
1957.19    0.455   196.14
1958.19    0.429   194.87
1959.19    0.403   193.44
1960.19    0.376   191.81
1961.19    0.348   189.92
1962.19    0.320   187.70
1963.19    0.291   185.04
1964.19    0.262   181.81
1965.19    0.233   177.76
1966.19    0.205   172.58
1967.19    0.177   165.77
1968.19    0.153   156.62
1969.19    0.132   144.32
1970.19    0.119   128.49
1971.19    0.116   110.34
1972.19    0.123    92.84
1973.19    0.140    78.38
1974.19    0.161    67.36
1975.19    0.186    59.08
1976.19    0.211    52.76
1977.19    0.235    47.77
1978.19    0.257    43.69
1979.19    0.277    40.23
1980.19    0.293    37.19
1981.19    0.306    34.44
1982.19    0.315    31.88
1983.19    0.319    29.43
1984.19    0.320    27.02
1985.19    0.318    24.60
1986.19    0.313    22.11
1987.19    0.304    19.52
1988.19    0.294    16.76
1989.19    0.282    13.78
1990.19    0.269    10.52
1991.19    0.254     6.91
1992.19    0.240     2.86
1993.19    0.225   358.28
1994.19    0.211   353.08
1995.19    0.198   347.16
1996.19    0.187   340.47
1997.19    0.178   333.00
1998.19    0.171   324.84
1999.19    0.168   316.20
2000.19    0.168   307.40
2001.19    0.172   298.79
2002.19    0.178   290.69
2003.19    0.188   283.32
2004.19    0.200   276.75
2005.19    0.214   270.99
2006.19    0.230   265.97
2007.19    0.247   261.62
2008.19    0.264   257.83
2009.19    0.283   254.52
2010.19    0.301   251.61
2011.19    0.320   249.05
2012.19    0.339   246.77
2013.19    0.358   244.73
2014.19    0.377   242.91
2015.19    0.396   241.25
2016.19    0.415   239.75
2017.19    0.434   238.38
2018.19    0.452   237.12
2019.19    0.471   235.96
2020.19    0.489   234.89
2021.19    0.506   233.89
2022.19    0.524   232.95
2023.19    0.541   232.08
2024.19    0.558   231.26
2025.19    0.574   230.49
2026.19    0.590   229.76
2027.19    0.606   229.07
2028.19    0.621   228.41
2029.19    0.636   227.79
2030.19    0.651   227.19
2031.19    0.665   226.62
2032.19    0.679   226.07
2033.19    0.692   225.55
2034.19    0.705   225.04
2035.19    0.718   224.55
2036.19    0.730   224.08
2037.19    0.742   223.63
2038.19    0.753   223.19
2039.19    0.764   222.76
2040.19    0.775   222.34
2041.19    0.785   221.93
2042.19    0.795   221.54
2043.19    0.804   221.15
2044.19    0.813   220.77
2045.19    0.821   220.40
2046.19    0.829   220.04
2047.19    0.837   219.68
2048.19    0.844   219.33
2049.19    0.850   218.99
2050.19    0.857   218.65
2051.19    0.862   218.32
2052.19    0.868   217.98
2053.19    0.872   217.66
2054.19    0.877   217.34
2055.19    0.880   217.02
2056.19    0.884   216.70
2057.19    0.887   216.38
2058.19    0.889   216.07
2059.19    0.891   215.76
2060.19    0.893   215.45
2061.19    0.893   215.14
2062.19    0.894   214.83
2063.19    0.894   214.52
2064.19    0.893   214.21
2065.19    0.892   213.90
2066.19    0.891   213.59
2067.19    0.888   213.28
2068.19    0.886   212.96
2069.19    0.882   212.64
2070.19    0.879   212.33
2071.19    0.874   212.00
2072.19    0.870   211.68
2073.19    0.864   211.35
2074.19    0.858   211.02
2075.19    0.851   210.68
2076.19    0.844   210.34
2077.19    0.837   209.99
2078.19    0.828   209.63
2079.19    0.819   209.27
2080.19    0.810   208.89
2081.19    0.799   208.51
2082.19    0.788   208.12
2083.19    0.777   207.72
2084.19    0.765   207.30
2085.19    0.752   206.87
2086.19    0.738   206.42
2087.19    0.724   205.96
2088.19    0.709   205.48
2089.19    0.693   204.98
2090.19    0.677   204.45
2091.19    0.660   203.90
2092.19    0.642   203.31
2093.19    0.623   202.70
2094.19    0.604   202.04
2095.19    0.583   201.34
2096.19    0.562   200.58

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 14:43:14