Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:41:15

Orbital Elements for STF2107AB

WDS:	STF2107AB	WDS ID/Discoverer
P:	274.088	Orbital period (years)
a:	1.03828	Semi-major axis (arcseconds)
i:	31.633	Inclination (degrees)
Ω:	45.623	Longitude of ascending node (degrees)
T:	1896.245	Epoch of periastron passage (year)
e:	0.5788	Eccentricity
ω:	250.267	Longitude of periastron (degrees)
Start-Year:	1888.0	Year
End-Year:	2162.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2107AB

Position:	165150.10+283958.7	Epoch-2000 right ascension and declination
WDS-ID:	16518+2840	WDS designation
Discoverer Code:	STF2107AB	Discover designation and components
ADS number:	10235	Aitken Double Star catalog
HD number:	152380	HD catalog number
Hipparcos number:	82510	Hipparcos catalog number
V1:	6.90	Magnitude of the primary
V2:	8.50	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF2107AB

WDS 6th Orbit including measures of STF2107AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of STF2107AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.433    108.8
-------------------------
1888.0     0.481    246.7
1889.0     0.465    251.1
1890.0     0.449    255.8
1891.0     0.434    260.9
1892.0     0.420    266.3
1893.0     0.408    272.0
1894.0     0.397    278.1
1895.0     0.388    284.5
1896.0     0.382    291.1
1897.0     0.378    297.9
1898.0     0.376    304.9
1899.0     0.378    311.8
1900.0     0.383    318.6
1901.0     0.390    325.2
1902.0     0.400    331.5
1903.0     0.413    337.4
1904.0     0.427    343.0
1905.0     0.442    348.2
1906.0     0.460    353.1
1907.0     0.478    357.5
1908.0     0.496      1.7
1909.0     0.516      5.5
1910.0     0.536      9.1
1911.0     0.556     12.4
1912.0     0.576     15.5
1913.0     0.596     18.3
1914.0     0.616     21.0
1915.0     0.636     23.5
1916.0     0.655     25.9
1917.0     0.675     28.1
1918.0     0.694     30.2
1919.0     0.713     32.2
1920.0     0.731     34.1
1921.0     0.749     35.9
1922.0     0.767     37.6
1923.0     0.785     39.2
1924.0     0.802     40.8
1925.0     0.819     42.3
1926.0     0.836     43.7
1927.0     0.852     45.1
1928.0     0.868     46.4
1929.0     0.883     47.7
1930.0     0.898     48.9
1931.0     0.913     50.1
1932.0     0.928     51.3
1933.0     0.942     52.4
1934.0     0.956     53.5
1935.0     0.970     54.6
1936.0     0.983     55.6
1937.0     0.996     56.6
1938.0     1.009     57.6
1939.0     1.021     58.5
1940.0     1.034     59.5
1941.0     1.046     60.4
1942.0     1.057     61.3
1943.0     1.069     62.1
1944.0     1.080     63.0
1945.0     1.091     63.8
1946.0     1.102     64.6
1947.0     1.112     65.4
1948.0     1.123     66.2
1949.0     1.133     67.0
1950.0     1.142     67.8
1951.0     1.152     68.5
1952.0     1.161     69.2
1953.0     1.170     70.0
1954.0     1.179     70.7
1955.0     1.188     71.4
1956.0     1.197     72.1
1957.0     1.205     72.8
1958.0     1.213     73.4
1959.0     1.221     74.1
1960.0     1.229     74.7
1961.0     1.237     75.4
1962.0     1.244     76.0
1963.0     1.251     76.7
1964.0     1.258     77.3
1965.0     1.265     77.9
1966.0     1.272     78.5
1967.0     1.278     79.1
1968.0     1.285     79.7
1969.0     1.291     80.3
1970.0     1.297     80.9
1971.0     1.303     81.5
1972.0     1.309     82.1
1973.0     1.314     82.6
1974.0     1.320     83.2
1975.0     1.325     83.8
1976.0     1.330     84.3
1977.0     1.335     84.9
1978.0     1.340     85.4
1979.0     1.345     86.0
1980.0     1.349     86.5
1981.0     1.354     87.0
1982.0     1.358     87.6
1983.0     1.362     88.1
1984.0     1.366     88.6
1985.0     1.370     89.2
1986.0     1.374     89.7
1987.0     1.378     90.2
1988.0     1.381     90.7
1989.0     1.385     91.2
1990.0     1.388     91.7
1991.0     1.391     92.3
1992.0     1.394     92.8
1993.0     1.397     93.3
1994.0     1.400     93.8
1995.0     1.403     94.3
1996.0     1.405     94.8
1997.0     1.408     95.3
1998.0     1.410     95.8
1999.0     1.412     96.3
2000.0     1.414     96.7
2001.0     1.416     97.2
2002.0     1.418     97.7
2003.0     1.420     98.2
2004.0     1.421     98.7
2005.0     1.423     99.2
2006.0     1.424     99.7
2007.0     1.426    100.2
2008.0     1.427    100.6
2009.0     1.428    101.1
2010.0     1.429    101.6
2011.0     1.430    102.1
2012.0     1.431    102.6
2013.0     1.432    103.0
2014.0     1.432    103.5
2015.0     1.433    104.0
2016.0     1.433    104.5
2017.0     1.434    105.0
2018.0     1.434    105.4
2019.0     1.434    105.9
2020.0     1.434    106.4
2021.0     1.434    106.9
2022.0     1.434    107.4
2023.0     1.433    107.8
2024.0     1.433    108.3
2025.0     1.433    108.8
2026.0     1.432    109.3
2027.0     1.432    109.7
2028.0     1.431    110.2
2029.0     1.430    110.7
2030.0     1.429    111.2
2031.0     1.428    111.7
2032.0     1.427    112.2
2033.0     1.426    112.6
2034.0     1.425    113.1
2035.0     1.423    113.6
2036.0     1.422    114.1
2037.0     1.420    114.6
2038.0     1.419    115.1
2039.0     1.417    115.6
2040.0     1.415    116.0
2041.0     1.413    116.5
2042.0     1.411    117.0
2043.0     1.409    117.5
2044.0     1.407    118.0
2045.0     1.405    118.5
2046.0     1.403    119.0
2047.0     1.400    119.5
2048.0     1.398    120.0
2049.0     1.395    120.5
2050.0     1.393    121.0
2051.0     1.390    121.5
2052.0     1.387    122.0
2053.0     1.384    122.6
2054.0     1.381    123.1
2055.0     1.378    123.6
2056.0     1.375    124.1
2057.0     1.372    124.6
2058.0     1.369    125.2
2059.0     1.365    125.7
2060.0     1.362    126.2
2061.0     1.358    126.7
2062.0     1.355    127.3
2063.0     1.351    127.8
2064.0     1.347    128.3
2065.0     1.344    128.9
2066.0     1.340    129.4
2067.0     1.336    130.0
2068.0     1.331    130.5
2069.0     1.327    131.1
2070.0     1.323    131.7
2071.0     1.319    132.2
2072.0     1.314    132.8
2073.0     1.310    133.4
2074.0     1.305    133.9
2075.0     1.301    134.5
2076.0     1.296    135.1
2077.0     1.291    135.7
2078.0     1.286    136.3
2079.0     1.281    136.9
2080.0     1.276    137.5
2081.0     1.271    138.1
2082.0     1.266    138.7
2083.0     1.260    139.3
2084.0     1.255    139.9
2085.0     1.249    140.6
2086.0     1.244    141.2
2087.0     1.238    141.8
2088.0     1.233    142.5
2089.0     1.227    143.1
2090.0     1.221    143.8
2091.0     1.215    144.4
2092.0     1.209    145.1
2093.0     1.203    145.8
2094.0     1.196    146.5
2095.0     1.190    147.2
2096.0     1.184    147.9
2097.0     1.177    148.6
2098.0     1.171    149.3
2099.0     1.164    150.0
2100.0     1.157    150.7
2101.0     1.150    151.5
2102.0     1.143    152.2
2103.0     1.136    153.0
2104.0     1.129    153.7
2105.0     1.122    154.5
2106.0     1.115    155.3
2107.0     1.107    156.1
2108.0     1.100    156.9
2109.0     1.092    157.7
2110.0     1.085    158.5
2111.0     1.077    159.4
2112.0     1.069    160.2
2113.0     1.061    161.1
2114.0     1.053    162.0
2115.0     1.045    162.9
2116.0     1.037    163.8
2117.0     1.028    164.7
2118.0     1.020    165.6
2119.0     1.011    166.6
2120.0     1.002    167.6
2121.0     0.994    168.6
2122.0     0.985    169.6
2123.0     0.975    170.6
2124.0     0.966    171.6
2125.0     0.957    172.7
2126.0     0.947    173.8
2127.0     0.938    174.9
2128.0     0.928    176.0
2129.0     0.918    177.2
2130.0     0.908    178.3
2131.0     0.898    179.6
2132.0     0.888    180.8
2133.0     0.877    182.0
2134.0     0.867    183.3
2135.0     0.856    184.7
2136.0     0.845    186.0
2137.0     0.834    187.4
2138.0     0.823    188.9
2139.0     0.811    190.3
2140.0     0.799    191.8
2141.0     0.788    193.4
2142.0     0.775    195.0
2143.0     0.763    196.7
2144.0     0.751    198.4
2145.0     0.738    200.2
2146.0     0.725    202.0
2147.0     0.711    203.9
2148.0     0.698    205.9
2149.0     0.684    207.9
2150.0     0.670    210.1
2151.0     0.656    212.3
2152.0     0.641    214.7
2153.0     0.626    217.1
2154.0     0.611    219.7
2155.0     0.595    222.4
2156.0     0.580    225.2
2157.0     0.564    228.2
2158.0     0.547    231.4
2159.0     0.531    234.8
2160.0     0.515    238.4
2161.0     0.498    242.2

Disclaimer

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.