Double Star Calculator - Orbit

Orbital Elements for STF3128AB
WDS: STF3128AB WDS ID/Discoverer
P: 353.894 Orbital period (years)
a: 0.90295 Semi-major axis (arcseconds)
i: 158.548 Inclination (degrees)
Ω: 19.871 Longitude of ascending node (degrees)
T: 1946.890 Epoch of periastron passage (year)
e: 0.94042 Eccentricity
ω: 160.838 Longitude of periastron (degrees)
Start-Year: 1848.05305 Year
End-Year: 2201.94695 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF3128AB
Position: 175258.64-075510.2 Epoch-2000 right ascension and declination
WDS-ID: 17530-0755 WDS designation
Discoverer Code: STF3128AB Discover designation and components
ADS number: 10858 Aitken Double Star catalog
HD number: 162756 HD catalog number
Hipparcos number: 87533 Hipparcos catalog number
V1: 7.82 Magnitude of the primary
V2: 9.95 Magnitude of the secondary
Equinox: Equinox
Date: 2015 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Izm2019 Reference

Double Star Orbit for STF3128AB



WDS 6th Orbit including measures of STF3128AB

-- 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 STF3128AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    1.368    47.71
--------------------------
1848.05    1.522    30.41
1849.05    1.516    30.29
1850.05    1.510    30.18
1851.05    1.503    30.06
1852.05    1.497    29.95
1853.05    1.491    29.83
1854.05    1.484    29.71
1855.05    1.478    29.59
1856.05    1.471    29.47
1857.05    1.464    29.35
1858.05    1.457    29.22
1859.05    1.450    29.10
1860.05    1.443    28.97
1861.05    1.436    28.85
1862.05    1.429    28.72
1863.05    1.421    28.59
1864.05    1.414    28.46
1865.05    1.406    28.33
1866.05    1.398    28.19
1867.05    1.391    28.06
1868.05    1.383    27.92
1869.05    1.375    27.78
1870.05    1.366    27.64
1871.05    1.358    27.50
1872.05    1.350    27.36
1873.05    1.341    27.22
1874.05    1.332    27.07
1875.05    1.324    26.92
1876.05    1.315    26.77
1877.05    1.306    26.62
1878.05    1.297    26.46
1879.05    1.287    26.30
1880.05    1.278    26.14
1881.05    1.268    25.98
1882.05    1.259    25.82
1883.05    1.249    25.65
1884.05    1.239    25.48
1885.05    1.229    25.31
1886.05    1.219    25.13
1887.05    1.208    24.96
1888.05    1.198    24.77
1889.05    1.187    24.59
1890.05    1.176    24.40
1891.05    1.165    24.21
1892.05    1.154    24.01
1893.05    1.143    23.82
1894.05    1.131    23.61
1895.05    1.120    23.41
1896.05    1.108    23.19
1897.05    1.096    22.98
1898.05    1.084    22.76
1899.05    1.072    22.53
1900.05    1.059    22.30
1901.05    1.046    22.06
1902.05    1.034    21.82
1903.05    1.020    21.57
1904.05    1.007    21.32
1905.05    0.994    21.05
1906.05    0.980    20.78
1907.05    0.966    20.51
1908.05    0.952    20.22
1909.05    0.937    19.93
1910.05    0.923    19.62
1911.05    0.908    19.31
1912.05    0.893    18.99
1913.05    0.877    18.65
1914.05    0.862    18.31
1915.05    0.846    17.94
1916.05    0.830    17.57
1917.05    0.813    17.18
1918.05    0.796    16.78
1919.05    0.779    16.35
1920.05    0.762    15.91
1921.05    0.744    15.45
1922.05    0.725    14.96
1923.05    0.707    14.45
1924.05    0.688    13.91
1925.05    0.668    13.34
1926.05    0.648    12.73
1927.05    0.628    12.09
1928.05    0.607    11.40
1929.05    0.586    10.66
1930.05    0.564     9.87
1931.05    0.541     9.01
1932.05    0.518     8.07
1933.05    0.494     7.05
1934.05    0.469     5.92
1935.05    0.444     4.66
1936.05    0.418     3.24
1937.05    0.390     1.63
1938.05    0.361   359.77
1939.05    0.332   357.58
1940.05    0.300   354.95
1941.05    0.267   351.68
1942.05    0.232   347.45
1943.05    0.195   341.64
1944.05    0.154   332.93
1945.05    0.111   317.71
1946.05    0.069   283.27
1947.05    0.055   203.09
1948.05    0.084   142.12
1949.05    0.123   116.58
1950.05    0.162   103.45
1951.05    0.199    95.31
1952.05    0.233    89.65
1953.05    0.266    85.42
1954.05    0.297    82.10
1955.05    0.327    79.40
1956.05    0.355    77.14
1957.05    0.382    75.21
1958.05    0.409    73.53
1959.05    0.434    72.05
1960.05    0.459    70.74
1961.05    0.483    69.55
1962.05    0.506    68.48
1963.05    0.528    67.50
1964.05    0.550    66.59
1965.05    0.572    65.76
1966.05    0.593    64.98
1967.05    0.613    64.26
1968.05    0.633    63.59
1969.05    0.652    62.95
1970.05    0.671    62.35
1971.05    0.690    61.78
1972.05    0.708    61.25
1973.05    0.726    60.74
1974.05    0.744    60.25
1975.05    0.761    59.79
1976.05    0.778    59.34
1977.05    0.795    58.92
1978.05    0.811    58.51
1979.05    0.827    58.12
1980.05    0.843    57.74
1981.05    0.858    57.38
1982.05    0.874    57.03
1983.05    0.889    56.69
1984.05    0.903    56.37
1985.05    0.918    56.05
1986.05    0.932    55.74
1987.05    0.946    55.45
1988.05    0.960    55.16
1989.05    0.974    54.88
1990.05    0.987    54.60
1991.05    1.000    54.34
1992.05    1.013    54.08
1993.05    1.026    53.83
1994.05    1.039    53.58
1995.05    1.051    53.34
1996.05    1.064    53.10
1997.05    1.076    52.88
1998.05    1.088    52.65
1999.05    1.100    52.43
2000.05    1.111    52.22
2001.05    1.123    52.01
2002.05    1.134    51.80
2003.05    1.145    51.60
2004.05    1.156    51.40
2005.05    1.167    51.21
2006.05    1.178    51.01
2007.05    1.188    50.83
2008.05    1.199    50.64
2009.05    1.209    50.46
2010.05    1.219    50.28
2011.05    1.229    50.11
2012.05    1.239    49.94
2013.05    1.249    49.77
2014.05    1.259    49.60
2015.05    1.268    49.44
2016.05    1.277    49.27
2017.05    1.287    49.11
2018.05    1.296    48.96
2019.05    1.305    48.80
2020.05    1.314    48.65
2021.05    1.322    48.50
2022.05    1.331    48.35
2023.05    1.340    48.20
2024.05    1.348    48.06
2025.05    1.356    47.91
2026.05    1.364    47.77
2027.05    1.373    47.63
2028.05    1.381    47.49
2029.05    1.388    47.35
2030.05    1.396    47.22
2031.05    1.404    47.09
2032.05    1.411    46.95
2033.05    1.419    46.82
2034.05    1.426    46.69
2035.05    1.433    46.56
2036.05    1.441    46.44
2037.05    1.448    46.31
2038.05    1.454    46.19
2039.05    1.461    46.06
2040.05    1.468    45.94
2041.05    1.475    45.82
2042.05    1.481    45.70
2043.05    1.488    45.58
2044.05    1.494    45.46
2045.05    1.500    45.34
2046.05    1.507    45.23
2047.05    1.513    45.11
2048.05    1.519    45.00
2049.05    1.524    44.89
2050.05    1.530    44.77
2051.05    1.536    44.66
2052.05    1.542    44.55
2053.05    1.547    44.44
2054.05    1.553    44.33
2055.05    1.558    44.22
2056.05    1.563    44.11
2057.05    1.568    44.01
2058.05    1.574    43.90
2059.05    1.579    43.80
2060.05    1.584    43.69
2061.05    1.588    43.59
2062.05    1.593    43.48
2063.05    1.598    43.38
2064.05    1.603    43.28
2065.05    1.607    43.18
2066.05    1.611    43.07
2067.05    1.616    42.97
2068.05    1.620    42.87
2069.05    1.624    42.77
2070.05    1.628    42.67
2071.05    1.633    42.58
2072.05    1.636    42.48
2073.05    1.640    42.38
2074.05    1.644    42.28
2075.05    1.648    42.19
2076.05    1.652    42.09
2077.05    1.655    41.99
2078.05    1.659    41.90
2079.05    1.662    41.80
2080.05    1.665    41.71
2081.05    1.669    41.61
2082.05    1.672    41.52
2083.05    1.675    41.42
2084.05    1.678    41.33
2085.05    1.681    41.24
2086.05    1.684    41.15
2087.05    1.687    41.05
2088.05    1.689    40.96
2089.05    1.692    40.87
2090.05    1.695    40.78
2091.05    1.697    40.69
2092.05    1.700    40.60
2093.05    1.702    40.50
2094.05    1.704    40.41
2095.05    1.706    40.32
2096.05    1.709    40.23
2097.05    1.711    40.14
2098.05    1.713    40.05
2099.05    1.715    39.97
2100.05    1.716    39.88
2101.05    1.718    39.79
2102.05    1.720    39.70
2103.05    1.722    39.61
2104.05    1.723    39.52
2105.05    1.725    39.43
2106.05    1.726    39.34
2107.05    1.727    39.26
2108.05    1.729    39.17
2109.05    1.730    39.08
2110.05    1.731    38.99
2111.05    1.732    38.91
2112.05    1.733    38.82
2113.05    1.734    38.73
2114.05    1.735    38.64
2115.05    1.736    38.56
2116.05    1.736    38.47
2117.05    1.737    38.38
2118.05    1.738    38.30
2119.05    1.738    38.21
2120.05    1.738    38.12
2121.05    1.739    38.03
2122.05    1.739    37.95
2123.05    1.739    37.86
2124.05    1.739    37.77
2125.05    1.740    37.69
2126.05    1.740    37.60
2127.05    1.739    37.51
2128.05    1.739    37.43
2129.05    1.739    37.34
2130.05    1.739    37.25
2131.05    1.738    37.17
2132.05    1.738    37.08
2133.05    1.737    36.99
2134.05    1.737    36.91
2135.05    1.736    36.82
2136.05    1.736    36.73
2137.05    1.735    36.65
2138.05    1.734    36.56
2139.05    1.733    36.47
2140.05    1.732    36.38
2141.05    1.731    36.30
2142.05    1.730    36.21
2143.05    1.729    36.12
2144.05    1.727    36.03
2145.05    1.726    35.94
2146.05    1.724    35.86
2147.05    1.723    35.77
2148.05    1.721    35.68
2149.05    1.720    35.59
2150.05    1.718    35.50
2151.05    1.716    35.41
2152.05    1.714    35.32
2153.05    1.712    35.23
2154.05    1.710    35.14
2155.05    1.708    35.05
2156.05    1.706    34.96
2157.05    1.704    34.87
2158.05    1.701    34.78
2159.05    1.699    34.69
2160.05    1.697    34.60
2161.05    1.694    34.51
2162.05    1.691    34.42
2163.05    1.689    34.33
2164.05    1.686    34.23
2165.05    1.683    34.14
2166.05    1.680    34.05
2167.05    1.677    33.96
2168.05    1.674    33.86
2169.05    1.671    33.77
2170.05    1.668    33.67
2171.05    1.664    33.58
2172.05    1.661    33.49
2173.05    1.658    33.39
2174.05    1.654    33.29
2175.05    1.650    33.20
2176.05    1.647    33.10
2177.05    1.643    33.00
2178.05    1.639    32.91
2179.05    1.635    32.81
2180.05    1.631    32.71
2181.05    1.627    32.61
2182.05    1.623    32.51
2183.05    1.619    32.41
2184.05    1.614    32.31
2185.05    1.610    32.21
2186.05    1.605    32.11
2187.05    1.601    32.01
2188.05    1.596    31.90
2189.05    1.591    31.80
2190.05    1.586    31.70
2191.05    1.581    31.59
2192.05    1.576    31.49
2193.05    1.571    31.38
2194.05    1.566    31.27
2195.05    1.561    31.17
2196.05    1.555    31.06
2197.05    1.550    30.95
2198.05    1.544    30.84
2199.05    1.539    30.73
2200.05    1.533    30.62
2201.05    1.527    30.51






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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 17:43:57



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