Double Star Calculator - Orbit

Orbital Elements for BU1333BC

WDS:	BU1333BC	WDS ID/Discoverer
P:	180.000	Orbital period (years)
a:	0.238	Semi-major axis (arcseconds)
i:	126.9	Inclination (degrees)
Ω:	49.3	Longitude of ascending node (degrees)
T:	2043.600	Epoch of periastron passage (year)
e:	0.67	Eccentricity
ω:	150.0	Longitude of periastron (degrees)
Start-Year:	1935.0	Year
End-Year:	2115.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1333BC
Position:	041913.77+613502.4	Epoch-2000 right ascension and declination
WDS-ID:	04192+6135	WDS designation
Discoverer Code:	BU1333BC	Discover designation and components
ADS number:	3109	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	10.49	Magnitude of the primary
V2:	9.82	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	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:	Tok2019e	Reference

Double Star Orbit for BU1333BC

WDS 6th Orbit including measures of BU1333BC

-- 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 BU1333BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.164    26.89
--------------------------
1935.00    0.330    76.13
1936.00    0.333    75.67
1937.00    0.335    75.22
1938.00    0.337    74.77
1939.00    0.340    74.33
1940.00    0.342    73.89
1941.00    0.344    73.47
1942.00    0.346    73.04
1943.00    0.348    72.62
1944.00    0.350    72.21
1945.00    0.352    71.80
1946.00    0.354    71.39
1947.00    0.355    70.99
1948.00    0.357    70.59
1949.00    0.358    70.20
1950.00    0.360    69.81
1951.00    0.361    69.42
1952.00    0.362    69.03
1953.00    0.364    68.65
1954.00    0.365    68.27
1955.00    0.366    67.89
1956.00    0.367    67.51
1957.00    0.368    67.14
1958.00    0.368    66.76
1959.00    0.369    66.39
1960.00    0.370    66.02
1961.00    0.370    65.66
1962.00    0.371    65.29
1963.00    0.371    64.92
1964.00    0.372    64.55
1965.00    0.372    64.19
1966.00    0.372    63.82
1967.00    0.372    63.46
1968.00    0.372    63.09
1969.00    0.372    62.73
1970.00    0.372    62.36
1971.00    0.371    62.00
1972.00    0.371    61.63
1973.00    0.370    61.26
1974.00    0.370    60.89
1975.00    0.369    60.52
1976.00    0.368    60.15
1977.00    0.368    59.78
1978.00    0.367    59.40
1979.00    0.366    59.03
1980.00    0.364    58.65
1981.00    0.363    58.27
1982.00    0.362    57.88
1983.00    0.360    57.50
1984.00    0.359    57.11
1985.00    0.357    56.71
1986.00    0.355    56.31
1987.00    0.353    55.91
1988.00    0.351    55.50
1989.00    0.349    55.09
1990.00    0.347    54.68
1991.00    0.345    54.26
1992.00    0.342    53.83
1993.00    0.340    53.39
1994.00    0.337    52.95
1995.00    0.334    52.51
1996.00    0.331    52.05
1997.00    0.328    51.59
1998.00    0.325    51.11
1999.00    0.322    50.63
2000.00    0.318    50.14
2001.00    0.315    49.64
2002.00    0.311    49.12
2003.00    0.307    48.59
2004.00    0.303    48.05
2005.00    0.299    47.49
2006.00    0.295    46.92
2007.00    0.290    46.33
2008.00    0.286    45.72
2009.00    0.281    45.09
2010.00    0.276    44.44
2011.00    0.271    43.76
2012.00    0.265    43.06
2013.00    0.260    42.33
2014.00    0.254    41.57
2015.00    0.248    40.76
2016.00    0.242    39.92
2017.00    0.236    39.04
2018.00    0.229    38.11
2019.00    0.223    37.12
2020.00    0.216    36.07
2021.00    0.208    34.94
2022.00    0.201    33.74
2023.00    0.193    32.44
2024.00    0.185    31.03
2025.00    0.177    29.49
2026.00    0.169    27.80
2027.00    0.160    25.93
2028.00    0.151    23.84
2029.00    0.142    21.49
2030.00    0.132    18.80
2031.00    0.123    15.70
2032.00    0.113    12.07
2033.00    0.103     7.74
2034.00    0.093     2.51
2035.00    0.084   356.07
2036.00    0.075   348.04
2037.00    0.067   338.00
2038.00    0.061   325.61
2039.00    0.057   311.05
2040.00    0.057   295.31
2041.00    0.059   279.97
2042.00    0.063   266.26
2043.00    0.069   254.56
2044.00    0.074   244.64
2045.00    0.079   236.07
2046.00    0.083   228.45
2047.00    0.087   221.48
2048.00    0.089   214.92
2049.00    0.090   208.64
2050.00    0.092   202.54
2051.00    0.092   196.57
2052.00    0.093   190.72
2053.00    0.094   184.98
2054.00    0.095   179.36
2055.00    0.097   173.90
2056.00    0.099   168.61
2057.00    0.101   163.52
2058.00    0.103   158.65
2059.00    0.106   154.03
2060.00    0.109   149.65
2061.00    0.112   145.52
2062.00    0.116   141.65
2063.00    0.120   138.01
2064.00    0.124   134.61
2065.00    0.128   131.43
2066.00    0.133   128.46
2067.00    0.137   125.68
2068.00    0.142   123.08
2069.00    0.146   120.65
2070.00    0.151   118.36
2071.00    0.156   116.22
2072.00    0.161   114.21
2073.00    0.166   112.32
2074.00    0.171   110.53
2075.00    0.175   108.84
2076.00    0.180   107.25
2077.00    0.185   105.74
2078.00    0.190   104.30
2079.00    0.195   102.94
2080.00    0.200   101.64
2081.00    0.204   100.40
2082.00    0.209    99.22
2083.00    0.214    98.09
2084.00    0.218    97.01
2085.00    0.223    95.97
2086.00    0.227    94.98
2087.00    0.232    94.02
2088.00    0.236    93.10
2089.00    0.241    92.21
2090.00    0.245    91.35
2091.00    0.249    90.52
2092.00    0.253    89.72
2093.00    0.257    88.95
2094.00    0.261    88.20
2095.00    0.265    87.47
2096.00    0.269    86.77
2097.00    0.273    86.08
2098.00    0.277    85.41
2099.00    0.281    84.76
2100.00    0.284    84.13
2101.00    0.288    83.51
2102.00    0.291    82.91
2103.00    0.295    82.32
2104.00    0.298    81.75
2105.00    0.301    81.18
2106.00    0.305    80.63
2107.00    0.308    80.09
2108.00    0.311    79.57
2109.00    0.314    79.05
2110.00    0.317    78.54
2111.00    0.320    78.04
2112.00    0.322    77.55
2113.00    0.325    77.07
2114.00    0.328    76.60

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 15:21:05