Double Star Calculator - Orbit

Orbital Elements for BU948AB
WDS: BU948AB WDS ID/Discoverer
P: 300.000 Orbital period (years)
a: 0.877 Semi-major axis (arcseconds)
i: 155.0 Inclination (degrees)
Ω: 107.6 Longitude of ascending node (degrees)
T: 2048.500 Epoch of periastron passage (year)
e: 0.611 Eccentricity
ω: 141.1 Longitude of periastron (degrees)
Start-Year: 1875.0 Year
End-Year: 2175.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for BU948AB
Position: 160544.53-061728.1 Epoch-2000 right ascension and declination
WDS-ID: 16057-0617 WDS designation
Discoverer Code: BU948AB Discover designation and components
ADS number: 9918 Aitken Double Star catalog
HD number: 144362 HD catalog number
Hipparcos number: 78849 Hipparcos catalog number
V1: 6.46 Magnitude of the primary
V2: 9.01 Magnitude of the secondary
Equinox: Equinox
Date: 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: Tok2021b Reference

Double Star Orbit for BU948AB



WDS 6th Orbit including measures of BU948AB

-- 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 BU948AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.542    62.76
--------------------------
1875.00    1.318   152.39
1876.00    1.321   152.01
1877.00    1.324   151.63
1878.00    1.327   151.25
1879.00    1.329   150.88
1880.00    1.332   150.51
1881.00    1.334   150.13
1882.00    1.337   149.76
1883.00    1.339   149.39
1884.00    1.341   149.02
1885.00    1.343   148.65
1886.00    1.345   148.29
1887.00    1.347   147.92
1888.00    1.349   147.56
1889.00    1.350   147.19
1890.00    1.352   146.83
1891.00    1.354   146.47
1892.00    1.355   146.11
1893.00    1.356   145.75
1894.00    1.358   145.39
1895.00    1.359   145.03
1896.00    1.360   144.67
1897.00    1.361   144.31
1898.00    1.362   143.96
1899.00    1.363   143.60
1900.00    1.363   143.24
1901.00    1.364   142.89
1902.00    1.364   142.53
1903.00    1.365   142.18
1904.00    1.365   141.82
1905.00    1.366   141.47
1906.00    1.366   141.11
1907.00    1.366   140.76
1908.00    1.366   140.40
1909.00    1.366   140.05
1910.00    1.366   139.69
1911.00    1.365   139.34
1912.00    1.365   138.98
1913.00    1.364   138.62
1914.00    1.364   138.27
1915.00    1.363   137.91
1916.00    1.363   137.56
1917.00    1.362   137.20
1918.00    1.361   136.84
1919.00    1.360   136.48
1920.00    1.359   136.12
1921.00    1.357   135.77
1922.00    1.356   135.41
1923.00    1.355   135.05
1924.00    1.353   134.68
1925.00    1.351   134.32
1926.00    1.350   133.96
1927.00    1.348   133.60
1928.00    1.346   133.23
1929.00    1.344   132.86
1930.00    1.342   132.50
1931.00    1.340   132.13
1932.00    1.337   131.76
1933.00    1.335   131.39
1934.00    1.333   131.02
1935.00    1.330   130.64
1936.00    1.327   130.27
1937.00    1.324   129.89
1938.00    1.322   129.51
1939.00    1.318   129.13
1940.00    1.315   128.75
1941.00    1.312   128.37
1942.00    1.309   127.98
1943.00    1.305   127.59
1944.00    1.302   127.20
1945.00    1.298   126.81
1946.00    1.294   126.42
1947.00    1.291   126.02
1948.00    1.287   125.62
1949.00    1.282   125.22
1950.00    1.278   124.82
1951.00    1.274   124.41
1952.00    1.269   124.00
1953.00    1.265   123.59
1954.00    1.260   123.17
1955.00    1.255   122.76
1956.00    1.251   122.33
1957.00    1.246   121.91
1958.00    1.240   121.48
1959.00    1.235   121.05
1960.00    1.230   120.61
1961.00    1.224   120.17
1962.00    1.219   119.73
1963.00    1.213   119.28
1964.00    1.207   118.83
1965.00    1.201   118.37
1966.00    1.195   117.91
1967.00    1.189   117.44
1968.00    1.183   116.97
1969.00    1.176   116.50
1970.00    1.169   116.02
1971.00    1.163   115.53
1972.00    1.156   115.04
1973.00    1.149   114.54
1974.00    1.142   114.03
1975.00    1.134   113.52
1976.00    1.127   113.00
1977.00    1.119   112.48
1978.00    1.112   111.95
1979.00    1.104   111.41
1980.00    1.096   110.86
1981.00    1.088   110.30
1982.00    1.079   109.74
1983.00    1.071   109.17
1984.00    1.062   108.58
1985.00    1.054   107.99
1986.00    1.045   107.39
1987.00    1.036   106.78
1988.00    1.027   106.16
1989.00    1.017   105.52
1990.00    1.008   104.88
1991.00    0.998   104.22
1992.00    0.988   103.55
1993.00    0.978   102.86
1994.00    0.968   102.16
1995.00    0.958   101.45
1996.00    0.947   100.72
1997.00    0.937    99.97
1998.00    0.926    99.21
1999.00    0.915    98.43
2000.00    0.904    97.63
2001.00    0.892    96.80
2002.00    0.881    95.96
2003.00    0.869    95.10
2004.00    0.857    94.21
2005.00    0.845    93.29
2006.00    0.833    92.35
2007.00    0.820    91.38
2008.00    0.808    90.38
2009.00    0.795    89.35
2010.00    0.782    88.28
2011.00    0.768    87.18
2012.00    0.755    86.04
2013.00    0.741    84.86
2014.00    0.728    83.63
2015.00    0.714    82.35
2016.00    0.700    81.03
2017.00    0.685    79.65
2018.00    0.671    78.21
2019.00    0.656    76.70
2020.00    0.641    75.13
2021.00    0.626    73.48
2022.00    0.611    71.75
2023.00    0.596    69.93
2024.00    0.581    68.02
2025.00    0.565    66.00
2026.00    0.550    63.87
2027.00    0.534    61.62
2028.00    0.519    59.23
2029.00    0.503    56.69
2030.00    0.488    53.99
2031.00    0.472    51.12
2032.00    0.457    48.05
2033.00    0.443    44.78
2034.00    0.428    41.29
2035.00    0.414    37.55
2036.00    0.401    33.55
2037.00    0.388    29.29
2038.00    0.376    24.74
2039.00    0.365    19.90
2040.00    0.355    14.78
2041.00    0.346     9.38
2042.00    0.339     3.73
2043.00    0.333   357.85
2044.00    0.329   351.79
2045.00    0.326   345.60
2046.00    0.325   339.34
2047.00    0.325   333.07
2048.00    0.327   326.85
2049.00    0.331   320.73
2050.00    0.335   314.76
2051.00    0.341   308.97
2052.00    0.348   303.38
2053.00    0.355   298.02
2054.00    0.363   292.88
2055.00    0.372   287.98
2056.00    0.381   283.30
2057.00    0.390   278.84
2058.00    0.400   274.60
2059.00    0.410   270.57
2060.00    0.420   266.73
2061.00    0.431   263.07
2062.00    0.442   259.59
2063.00    0.452   256.28
2064.00    0.463   253.12
2065.00    0.474   250.10
2066.00    0.485   247.22
2067.00    0.496   244.47
2068.00    0.508   241.85
2069.00    0.519   239.33
2070.00    0.530   236.92
2071.00    0.541   234.61
2072.00    0.553   232.40
2073.00    0.564   230.28
2074.00    0.575   228.23
2075.00    0.586   226.27
2076.00    0.598   224.38
2077.00    0.609   222.56
2078.00    0.620   220.81
2079.00    0.631   219.12
2080.00    0.642   217.48
2081.00    0.653   215.91
2082.00    0.664   214.38
2083.00    0.675   212.91
2084.00    0.686   211.48
2085.00    0.697   210.09
2086.00    0.708   208.75
2087.00    0.719   207.45
2088.00    0.729   206.19
2089.00    0.740   204.96
2090.00    0.750   203.77
2091.00    0.761   202.61
2092.00    0.771   201.48
2093.00    0.781   200.38
2094.00    0.792   199.31
2095.00    0.802   198.27
2096.00    0.812   197.25
2097.00    0.822   196.26
2098.00    0.831   195.29
2099.00    0.841   194.34
2100.00    0.851   193.41
2101.00    0.860   192.51
2102.00    0.870   191.63
2103.00    0.879   190.76
2104.00    0.889   189.91
2105.00    0.898   189.08
2106.00    0.907   188.27
2107.00    0.916   187.47
2108.00    0.925   186.69
2109.00    0.934   185.92
2110.00    0.943   185.17
2111.00    0.951   184.43
2112.00    0.960   183.71
2113.00    0.968   183.00
2114.00    0.977   182.30
2115.00    0.985   181.61
2116.00    0.993   180.93
2117.00    1.001   180.27
2118.00    1.009   179.61
2119.00    1.017   178.97
2120.00    1.025   178.33
2121.00    1.033   177.71
2122.00    1.041   177.09
2123.00    1.048   176.48
2124.00    1.056   175.89
2125.00    1.063   175.30
2126.00    1.070   174.71
2127.00    1.078   174.14
2128.00    1.085   173.57
2129.00    1.092   173.01
2130.00    1.099   172.46
2131.00    1.106   171.92
2132.00    1.112   171.38
2133.00    1.119   170.85
2134.00    1.126   170.32
2135.00    1.132   169.80
2136.00    1.138   169.29
2137.00    1.145   168.78
2138.00    1.151   168.28
2139.00    1.157   167.78
2140.00    1.163   167.29
2141.00    1.169   166.80
2142.00    1.175   166.32
2143.00    1.181   165.84
2144.00    1.186   165.37
2145.00    1.192   164.90
2146.00    1.197   164.44
2147.00    1.203   163.98
2148.00    1.208   163.52
2149.00    1.213   163.07
2150.00    1.219   162.62
2151.00    1.224   162.18
2152.00    1.229   161.74
2153.00    1.233   161.30
2154.00    1.238   160.87
2155.00    1.243   160.44
2156.00    1.248   160.01
2157.00    1.252   159.58
2158.00    1.256   159.16
2159.00    1.261   158.75
2160.00    1.265   158.33
2161.00    1.269   157.92
2162.00    1.273   157.51
2163.00    1.277   157.10
2164.00    1.281   156.70
2165.00    1.285   156.29
2166.00    1.289   155.89
2167.00    1.292   155.50
2168.00    1.296   155.10
2169.00    1.299   154.71
2170.00    1.303   154.32
2171.00    1.306   153.93
2172.00    1.309   153.54
2173.00    1.312   153.16
2174.00    1.315   152.77






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 17:22:50



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