Double Star Calculator - Orbit

Orbital Elements for BU870AB
WDS: BU870AB WDS ID/Discoverer
P: 184.900 Orbital period (years)
a: 0.911 Semi-major axis (arcseconds)
i: 133.3 Inclination (degrees)
Ω: 125.4 Longitude of ascending node (degrees)
T: 2021.800 Epoch of periastron passage (year)
e: 0.794 Eccentricity
ω: 269.5 Longitude of periastron (degrees)
Start-Year: 1932.55 Year
End-Year: 2117.45 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU870AB
Position: 014417.96+573211.8 Epoch-2000 right ascension and declination
WDS-ID: 01443+5732 WDS designation
Discoverer Code: BU870AB Discover designation and components
ADS number: 1359 Aitken Double Star catalog
HD number: 10543 HD catalog number
Hipparcos number: 8115 Hipparcos catalog number
V1: 6.29 Magnitude of the primary
V2: 8.68 Magnitude of the secondary
Equinox: Equinox
Date: 2010 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: Zas2017 Reference

Double Star Orbit for BU870AB



WDS 6th Orbit including measures of BU870AB

-- 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 BU870AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.323   127.75
--------------------------
1932.55    1.120    34.41
1933.55    1.119    33.87
1934.55    1.119    33.34
1935.55    1.118    32.80
1936.55    1.117    32.26
1937.55    1.116    31.72
1938.55    1.115    31.18
1939.55    1.114    30.63
1940.55    1.112    30.09
1941.55    1.111    29.55
1942.55    1.109    29.00
1943.55    1.107    28.45
1944.55    1.105    27.90
1945.55    1.103    27.35
1946.55    1.101    26.79
1947.55    1.099    26.23
1948.55    1.096    25.68
1949.55    1.093    25.11
1950.55    1.091    24.55
1951.55    1.088    23.98
1952.55    1.085    23.41
1953.55    1.082    22.84
1954.55    1.078    22.26
1955.55    1.075    21.68
1956.55    1.071    21.09
1957.55    1.068    20.50
1958.55    1.064    19.91
1959.55    1.060    19.31
1960.55    1.055    18.71
1961.55    1.051    18.10
1962.55    1.047    17.49
1963.55    1.042    16.87
1964.55    1.037    16.25
1965.55    1.032    15.62
1966.55    1.027    14.98
1967.55    1.022    14.34
1968.55    1.016    13.69
1969.55    1.011    13.04
1970.55    1.005    12.38
1971.55    0.999    11.70
1972.55    0.993    11.02
1973.55    0.986    10.34
1974.55    0.980     9.64
1975.55    0.973     8.93
1976.55    0.966     8.22
1977.55    0.959     7.49
1978.55    0.952     6.75
1979.55    0.944     6.00
1980.55    0.936     5.24
1981.55    0.928     4.46
1982.55    0.920     3.67
1983.55    0.911     2.87
1984.55    0.902     2.05
1985.55    0.893     1.22
1986.55    0.884     0.36
1987.55    0.874   359.49
1988.55    0.865   358.60
1989.55    0.854   357.69
1990.55    0.844   356.75
1991.55    0.833   355.80
1992.55    0.822   354.81
1993.55    0.810   353.80
1994.55    0.798   352.76
1995.55    0.786   351.69
1996.55    0.773   350.58
1997.55    0.760   349.43
1998.55    0.746   348.24
1999.55    0.732   347.01
2000.55    0.718   345.73
2001.55    0.702   344.39
2002.55    0.686   343.00
2003.55    0.670   341.53
2004.55    0.653   339.99
2005.55    0.634   338.36
2006.55    0.616   336.64
2007.55    0.596   334.80
2008.55    0.575   332.84
2009.55    0.552   330.71
2010.55    0.529   328.41
2011.55    0.504   325.88
2012.55    0.477   323.08
2013.55    0.448   319.94
2014.55    0.417   316.34
2015.55    0.383   312.13
2016.55    0.346   307.05
2017.55    0.304   300.65
2018.55    0.259   292.11
2019.55    0.209   279.68
2020.55    0.161   259.54
2021.55    0.130   226.21
2022.55    0.141   187.42
2023.55    0.183   160.81
2024.55    0.233   145.02
2025.55    0.281   134.77
2026.55    0.325   127.43
2027.55    0.365   121.77
2028.55    0.401   117.18
2029.55    0.434   113.32
2030.55    0.465   109.98
2031.55    0.493   107.04
2032.55    0.519   104.41
2033.55    0.544   102.02
2034.55    0.567    99.84
2035.55    0.589    97.82
2036.55    0.609    95.94
2037.55    0.629    94.18
2038.55    0.648    92.53
2039.55    0.666    90.97
2040.55    0.683    89.48
2041.55    0.699    88.07
2042.55    0.715    86.72
2043.55    0.730    85.43
2044.55    0.744    84.19
2045.55    0.758    83.00
2046.55    0.772    81.85
2047.55    0.785    80.74
2048.55    0.798    79.66
2049.55    0.810    78.62
2050.55    0.822    77.61
2051.55    0.833    76.62
2052.55    0.844    75.67
2053.55    0.855    74.73
2054.55    0.865    73.82
2055.55    0.875    72.93
2056.55    0.885    72.06
2057.55    0.894    71.21
2058.55    0.904    70.38
2059.55    0.913    69.56
2060.55    0.921    68.76
2061.55    0.930    67.97
2062.55    0.938    67.20
2063.55    0.946    66.44
2064.55    0.953    65.69
2065.55    0.961    64.96
2066.55    0.968    64.23
2067.55    0.975    63.52
2068.55    0.982    62.81
2069.55    0.988    62.12
2070.55    0.995    61.43
2071.55    1.001    60.76
2072.55    1.007    60.09
2073.55    1.013    59.43
2074.55    1.018    58.78
2075.55    1.024    58.13
2076.55    1.029    57.49
2077.55    1.034    56.86
2078.55    1.039    56.23
2079.55    1.044    55.61
2080.55    1.049    54.99
2081.55    1.053    54.38
2082.55    1.057    53.78
2083.55    1.062    53.18
2084.55    1.066    52.58
2085.55    1.069    51.99
2086.55    1.073    51.41
2087.55    1.077    50.82
2088.55    1.080    50.24
2089.55    1.083    49.67
2090.55    1.086    49.10
2091.55    1.089    48.53
2092.55    1.092    47.96
2093.55    1.095    47.40
2094.55    1.097    46.84
2095.55    1.100    46.28
2096.55    1.102    45.72
2097.55    1.104    45.17
2098.55    1.106    44.62
2099.55    1.108    44.07
2100.55    1.110    43.52
2101.55    1.112    42.97
2102.55    1.113    42.43
2103.55    1.114    41.89
2104.55    1.116    41.35
2105.55    1.117    40.80
2106.55    1.118    40.26
2107.55    1.119    39.73
2108.55    1.119    39.19
2109.55    1.120    38.65
2110.55    1.120    38.11
2111.55    1.121    37.58
2112.55    1.121    37.04
2113.55    1.121    36.50
2114.55    1.121    35.97
2115.55    1.121    35.43
2116.55    1.120    34.90






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 14:53:18



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