Double Star Calculator - Orbit

Orbital Elements for B177AB
WDS: B177AB WDS ID/Discoverer
P: 400.000 Orbital period (years)
a: 0.18 Semi-major axis (arcseconds)
i: 85.2 Inclination (degrees)
Ω: 197.0 Longitude of ascending node (degrees)
T: 2035.805 Epoch of periastron passage (year)
e: 0.7 Eccentricity
ω: 142.9 Longitude of periastron (degrees)
Start-Year: 1825.0 Year
End-Year: 2225.0 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for B177AB
Position: 090813.85-282909.8 Epoch-2000 right ascension and declination
WDS-ID: 09082-2829 WDS designation
Discoverer Code: B177AB Discover designation and components
ADS number: 7205 Aitken Double Star catalog
HD number: 78590 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 9.3 Magnitude of the primary
V2: 9.6 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 Date of last observation
Orbit grade: 4 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: Flags
Ephemerides: Ephemerides
Code: Tok2023a Reference

Double Star Orbit for B177AB



WDS 6th Orbit including measures of B177AB

-- 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 B177AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.008   244.03
--------------------------
1825.00    0.236   193.05
1826.00    0.237   193.08
1827.00    0.238   193.12
1828.00    0.239   193.15
1829.00    0.239   193.18
1830.00    0.240   193.21
1831.00    0.241   193.24
1832.00    0.242   193.27
1833.00    0.243   193.30
1834.00    0.243   193.33
1835.00    0.244   193.36
1836.00    0.245   193.38
1837.00    0.245   193.41
1838.00    0.246   193.44
1839.00    0.247   193.47
1840.00    0.247   193.50
1841.00    0.248   193.53
1842.00    0.249   193.56
1843.00    0.249   193.58
1844.00    0.250   193.61
1845.00    0.251   193.64
1846.00    0.251   193.67
1847.00    0.252   193.70
1848.00    0.252   193.72
1849.00    0.253   193.75
1850.00    0.253   193.78
1851.00    0.254   193.80
1852.00    0.254   193.83
1853.00    0.255   193.86
1854.00    0.255   193.89
1855.00    0.256   193.91
1856.00    0.256   193.94
1857.00    0.257   193.96
1858.00    0.257   193.99
1859.00    0.258   194.02
1860.00    0.258   194.04
1861.00    0.258   194.07
1862.00    0.259   194.10
1863.00    0.259   194.12
1864.00    0.260   194.15
1865.00    0.260   194.17
1866.00    0.260   194.20
1867.00    0.261   194.23
1868.00    0.261   194.25
1869.00    0.261   194.28
1870.00    0.261   194.30
1871.00    0.262   194.33
1872.00    0.262   194.35
1873.00    0.262   194.38
1874.00    0.262   194.40
1875.00    0.263   194.43
1876.00    0.263   194.45
1877.00    0.263   194.48
1878.00    0.263   194.50
1879.00    0.263   194.53
1880.00    0.263   194.55
1881.00    0.263   194.58
1882.00    0.264   194.60
1883.00    0.264   194.63
1884.00    0.264   194.65
1885.00    0.264   194.68
1886.00    0.264   194.71
1887.00    0.264   194.73
1888.00    0.264   194.76
1889.00    0.264   194.78
1890.00    0.264   194.81
1891.00    0.264   194.83
1892.00    0.264   194.86
1893.00    0.264   194.88
1894.00    0.264   194.91
1895.00    0.264   194.93
1896.00    0.263   194.96
1897.00    0.263   194.98
1898.00    0.263   195.01
1899.00    0.263   195.03
1900.00    0.263   195.06
1901.00    0.263   195.08
1902.00    0.262   195.11
1903.00    0.262   195.13
1904.00    0.262   195.16
1905.00    0.262   195.18
1906.00    0.261   195.21
1907.00    0.261   195.23
1908.00    0.261   195.26
1909.00    0.260   195.29
1910.00    0.260   195.31
1911.00    0.260   195.34
1912.00    0.259   195.36
1913.00    0.259   195.39
1914.00    0.258   195.41
1915.00    0.258   195.44
1916.00    0.258   195.47
1917.00    0.257   195.49
1918.00    0.257   195.52
1919.00    0.256   195.55
1920.00    0.256   195.57
1921.00    0.255   195.60
1922.00    0.254   195.63
1923.00    0.254   195.65
1924.00    0.253   195.68
1925.00    0.253   195.71
1926.00    0.252   195.74
1927.00    0.251   195.76
1928.00    0.251   195.79
1929.00    0.250   195.82
1930.00    0.249   195.85
1931.00    0.248   195.87
1932.00    0.248   195.90
1933.00    0.247   195.93
1934.00    0.246   195.96
1935.00    0.245   195.99
1936.00    0.244   196.02
1937.00    0.243   196.05
1938.00    0.242   196.08
1939.00    0.241   196.11
1940.00    0.241   196.14
1941.00    0.240   196.17
1942.00    0.239   196.20
1943.00    0.237   196.23
1944.00    0.236   196.26
1945.00    0.235   196.29
1946.00    0.234   196.32
1947.00    0.233   196.35
1948.00    0.232   196.39
1949.00    0.231   196.42
1950.00    0.230   196.45
1951.00    0.228   196.49
1952.00    0.227   196.52
1953.00    0.226   196.55
1954.00    0.224   196.59
1955.00    0.223   196.62
1956.00    0.222   196.66
1957.00    0.220   196.69
1958.00    0.219   196.73
1959.00    0.217   196.77
1960.00    0.216   196.80
1961.00    0.214   196.84
1962.00    0.213   196.88
1963.00    0.211   196.92
1964.00    0.210   196.96
1965.00    0.208   197.00
1966.00    0.206   197.04
1967.00    0.205   197.08
1968.00    0.203   197.12
1969.00    0.201   197.16
1970.00    0.199   197.21
1971.00    0.197   197.25
1972.00    0.195   197.30
1973.00    0.194   197.34
1974.00    0.192   197.39
1975.00    0.190   197.44
1976.00    0.187   197.49
1977.00    0.185   197.54
1978.00    0.183   197.59
1979.00    0.181   197.64
1980.00    0.179   197.69
1981.00    0.177   197.75
1982.00    0.174   197.81
1983.00    0.172   197.86
1984.00    0.170   197.92
1985.00    0.167   197.99
1986.00    0.165   198.05
1987.00    0.162   198.11
1988.00    0.160   198.18
1989.00    0.157   198.25
1990.00    0.154   198.32
1991.00    0.151   198.40
1992.00    0.149   198.47
1993.00    0.146   198.56
1994.00    0.143   198.64
1995.00    0.140   198.73
1996.00    0.137   198.82
1997.00    0.134   198.91
1998.00    0.131   199.01
1999.00    0.127   199.12
2000.00    0.124   199.23
2001.00    0.121   199.34
2002.00    0.117   199.47
2003.00    0.114   199.60
2004.00    0.110   199.74
2005.00    0.106   199.89
2006.00    0.103   200.04
2007.00    0.099   200.22
2008.00    0.095   200.40
2009.00    0.091   200.60
2010.00    0.087   200.82
2011.00    0.083   201.07
2012.00    0.078   201.34
2013.00    0.074   201.63
2014.00    0.070   201.97
2015.00    0.065   202.36
2016.00    0.060   202.80
2017.00    0.056   203.32
2018.00    0.051   203.93
2019.00    0.046   204.68
2020.00    0.041   205.61
2021.00    0.036   206.80
2022.00    0.031   208.40
2023.00    0.025   210.66
2024.00    0.020   214.11
2025.00    0.015   220.04
2026.00    0.010   232.22
2027.00    0.006   263.63
2028.00    0.006   318.68
2029.00    0.010   347.25
2030.00    0.015   358.52
2031.00    0.020     4.14
2032.00    0.026     7.48
2033.00    0.031     9.71
2034.00    0.035    11.32
2035.00    0.040    12.56
2036.00    0.044    13.56
2037.00    0.048    14.39
2038.00    0.051    15.10
2039.00    0.054    15.74
2040.00    0.056    16.31
2041.00    0.058    16.84
2042.00    0.060    17.34
2043.00    0.061    17.81
2044.00    0.062    18.27
2045.00    0.063    18.72
2046.00    0.063    19.16
2047.00    0.063    19.61
2048.00    0.062    20.05
2049.00    0.062    20.51
2050.00    0.061    20.97
2051.00    0.060    21.44
2052.00    0.059    21.93
2053.00    0.058    22.44
2054.00    0.057    22.97
2055.00    0.055    23.53
2056.00    0.054    24.12
2057.00    0.052    24.74
2058.00    0.050    25.41
2059.00    0.049    26.12
2060.00    0.047    26.88
2061.00    0.045    27.71
2062.00    0.043    28.61
2063.00    0.041    29.59
2064.00    0.039    30.66
2065.00    0.037    31.85
2066.00    0.035    33.17
2067.00    0.033    34.64
2068.00    0.031    36.30
2069.00    0.029    38.18
2070.00    0.028    40.33
2071.00    0.026    42.81
2072.00    0.024    45.68
2073.00    0.022    49.03
2074.00    0.020    52.98
2075.00    0.019    57.66
2076.00    0.017    63.20
2077.00    0.016    69.75
2078.00    0.015    77.38
2079.00    0.014    86.07
2080.00    0.013    95.58
2081.00    0.013   105.46
2082.00    0.014   115.17
2083.00    0.014   124.20
2084.00    0.015   132.23
2085.00    0.017   139.16
2086.00    0.018   145.05
2087.00    0.020   150.02
2088.00    0.021   154.21
2089.00    0.023   157.76
2090.00    0.025   160.78
2091.00    0.027   163.37
2092.00    0.029   165.62
2093.00    0.031   167.57
2094.00    0.033   169.28
2095.00    0.035   170.79
2096.00    0.037   172.14
2097.00    0.039   173.34
2098.00    0.041   174.42
2099.00    0.043   175.40
2100.00    0.045   176.28
2101.00    0.047   177.09
2102.00    0.050   177.83
2103.00    0.052   178.51
2104.00    0.054   179.14
2105.00    0.056   179.72
2106.00    0.058   180.26
2107.00    0.060   180.76
2108.00    0.062   181.23
2109.00    0.064   181.67
2110.00    0.066   182.08
2111.00    0.068   182.46
2112.00    0.070   182.83
2113.00    0.072   183.17
2114.00    0.074   183.49
2115.00    0.076   183.80
2116.00    0.078   184.09
2117.00    0.080   184.37
2118.00    0.082   184.63
2119.00    0.084   184.88
2120.00    0.086   185.12
2121.00    0.088   185.35
2122.00    0.090   185.56
2123.00    0.092   185.77
2124.00    0.094   185.97
2125.00    0.096   186.17
2126.00    0.098   186.35
2127.00    0.100   186.53
2128.00    0.102   186.70
2129.00    0.104   186.86
2130.00    0.106   187.02
2131.00    0.108   187.18
2132.00    0.109   187.33
2133.00    0.111   187.47
2134.00    0.113   187.61
2135.00    0.115   187.74
2136.00    0.117   187.87
2137.00    0.119   188.00
2138.00    0.120   188.12
2139.00    0.122   188.24
2140.00    0.124   188.35
2141.00    0.126   188.46
2142.00    0.128   188.57
2143.00    0.129   188.68
2144.00    0.131   188.78
2145.00    0.133   188.88
2146.00    0.135   188.98
2147.00    0.136   189.07
2148.00    0.138   189.17
2149.00    0.140   189.26
2150.00    0.141   189.34
2151.00    0.143   189.43
2152.00    0.145   189.52
2153.00    0.146   189.60
2154.00    0.148   189.68
2155.00    0.150   189.76
2156.00    0.151   189.83
2157.00    0.153   189.91
2158.00    0.154   189.98
2159.00    0.156   190.06
2160.00    0.158   190.13
2161.00    0.159   190.20
2162.00    0.161   190.26
2163.00    0.162   190.33
2164.00    0.164   190.40
2165.00    0.165   190.46
2166.00    0.167   190.52
2167.00    0.168   190.59
2168.00    0.170   190.65
2169.00    0.171   190.71
2170.00    0.173   190.77
2171.00    0.174   190.82
2172.00    0.176   190.88
2173.00    0.177   190.94
2174.00    0.178   190.99
2175.00    0.180   191.05
2176.00    0.181   191.10
2177.00    0.183   191.15
2178.00    0.184   191.21
2179.00    0.185   191.26
2180.00    0.187   191.31
2181.00    0.188   191.36
2182.00    0.189   191.41
2183.00    0.191   191.45
2184.00    0.192   191.50
2185.00    0.193   191.55
2186.00    0.195   191.59
2187.00    0.196   191.64
2188.00    0.197   191.69
2189.00    0.198   191.73
2190.00    0.200   191.77
2191.00    0.201   191.82
2192.00    0.202   191.86
2193.00    0.203   191.90
2194.00    0.205   191.94
2195.00    0.206   191.99
2196.00    0.207   192.03
2197.00    0.208   192.07
2198.00    0.209   192.11
2199.00    0.210   192.15
2200.00    0.212   192.19
2201.00    0.213   192.22
2202.00    0.214   192.26
2203.00    0.215   192.30
2204.00    0.216   192.34
2205.00    0.217   192.38
2206.00    0.218   192.41
2207.00    0.219   192.45
2208.00    0.220   192.48
2209.00    0.221   192.52
2210.00    0.222   192.56
2211.00    0.223   192.59
2212.00    0.224   192.63
2213.00    0.225   192.66
2214.00    0.226   192.69
2215.00    0.227   192.73
2216.00    0.228   192.76
2217.00    0.229   192.80
2218.00    0.230   192.83
2219.00    0.231   192.86
2220.00    0.232   192.89
2221.00    0.233   192.93
2222.00    0.234   192.96
2223.00    0.234   192.99
2224.00    0.235   193.02






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 16:14:08



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