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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:32:18

Orbital Elements for STF186

WDS:	STF186	WDS ID/Discoverer
P:	167.400	Orbital period (years)
a:	1.043	Semi-major axis (arcseconds)
i:	74.4	Inclination (degrees)
Ω:	220.0	Longitude of ascending node (degrees)
T:	1893.600	Epoch of periastron passage (year)
e:	0.721	Eccentricity
ω:	224.0	Longitude of periastron (degrees)
Start-Year:	1942.0	Year
End-Year:	2108.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF186

Position:	015553.80+015059.6	Epoch-2000 right ascension and declination
WDS-ID:	01559+0151	WDS designation
Discoverer Code:	STF186	Discover designation and components
ADS number:	1538	Aitken Double Star catalog
HD number:	11803	HD catalog number
Hipparcos number:	8998	Hipparcos catalog number
V1:	6.79	Magnitude of the primary
V2:	6.84	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF186

WDS 6th Orbit including measures of STF186

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

Ephemeris of STF186

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.532    261.0
-------------------------
1942.0     1.434    227.0
1943.0     1.439    227.2
1944.0     1.443    227.4
1945.0     1.448    227.6
1946.0     1.451    227.8
1947.0     1.454    228.0
1948.0     1.457    228.3
1949.0     1.459    228.5
1950.0     1.460    228.7
1951.0     1.461    228.9
1952.0     1.462    229.1
1953.0     1.462    229.3
1954.0     1.461    229.5
1955.0     1.460    229.7
1956.0     1.459    229.9
1957.0     1.457    230.1
1958.0     1.455    230.3
1959.0     1.452    230.5
1960.0     1.449    230.7
1961.0     1.446    230.9
1962.0     1.442    231.1
1963.0     1.438    231.3
1964.0     1.433    231.5
1965.0     1.428    231.8
1966.0     1.422    232.0
1967.0     1.416    232.2
1968.0     1.410    232.4
1969.0     1.403    232.6
1970.0     1.396    232.9
1971.0     1.389    233.1
1972.0     1.381    233.3
1973.0     1.373    233.5
1974.0     1.365    233.8
1975.0     1.356    234.0
1976.0     1.347    234.2
1977.0     1.337    234.5
1978.0     1.327    234.7
1979.0     1.317    235.0
1980.0     1.306    235.2
1981.0     1.295    235.5
1982.0     1.284    235.8
1983.0     1.273    236.0
1984.0     1.261    236.3
1985.0     1.248    236.6
1986.0     1.236    236.9
1987.0     1.223    237.1
1988.0     1.210    237.4
1989.0     1.196    237.7
1990.0     1.182    238.0
1991.0     1.168    238.4
1992.0     1.154    238.7
1993.0     1.139    239.0
1994.0     1.124    239.4
1995.0     1.109    239.7
1996.0     1.093    240.1
1997.0     1.077    240.4
1998.0     1.061    240.8
1999.0     1.045    241.2
2000.0     1.028    241.6
2001.0     1.011    242.0
2002.0     0.993    242.5
2003.0     0.976    242.9
2004.0     0.958    243.4
2005.0     0.940    243.9
2006.0     0.921    244.4
2007.0     0.903    244.9
2008.0     0.884    245.4
2009.0     0.865    246.0
2010.0     0.845    246.6
2011.0     0.826    247.2
2012.0     0.806    247.9
2013.0     0.786    248.6
2014.0     0.765    249.3
2015.0     0.745    250.1
2016.0     0.724    250.9
2017.0     0.703    251.7
2018.0     0.682    252.6
2019.0     0.661    253.6
2020.0     0.640    254.6
2021.0     0.618    255.7
2022.0     0.597    256.9
2023.0     0.575    258.2
2024.0     0.554    259.6
2025.0     0.532    261.0
2026.0     0.510    262.6
2027.0     0.489    264.4
2028.0     0.468    266.3
2029.0     0.447    268.4
2030.0     0.426    270.7
2031.0     0.405    273.2
2032.0     0.386    276.0
2033.0     0.366    279.1
2034.0     0.348    282.5
2035.0     0.331    286.3
2036.0     0.315    290.5
2037.0     0.300    295.1
2038.0     0.287    300.2
2039.0     0.276    305.7
2040.0     0.268    311.6
2041.0     0.262    317.8
2042.0     0.259    324.2
2043.0     0.258    330.8
2044.0     0.261    337.2
2045.0     0.266    343.5
2046.0     0.273    349.5
2047.0     0.283    355.2
2048.0     0.294      0.4
2049.0     0.306      5.3
2050.0     0.318      9.8
2051.0     0.331     13.9
2052.0     0.343     17.7
2053.0     0.354     21.3
2054.0     0.362     24.7
2055.0     0.366     28.0
2056.0     0.366     31.2
2057.0     0.359     34.6
2058.0     0.342     38.1
2059.0     0.314     42.1
2060.0     0.272     47.2
2061.0     0.216     54.6
2062.0     0.153     67.7
2063.0     0.100     97.2
2064.0     0.097    148.3
2065.0     0.150    179.6
2066.0     0.218    193.0
2067.0     0.288    199.9
2068.0     0.355    204.1
2069.0     0.420    207.1
2070.0     0.481    209.2
2071.0     0.538    210.9
2072.0     0.592    212.3
2073.0     0.643    213.4
2074.0     0.691    214.4
2075.0     0.737    215.3
2076.0     0.780    216.0
2077.0     0.820    216.7
2078.0     0.859    217.3
2079.0     0.896    217.9
2080.0     0.930    218.4
2081.0     0.963    218.9
2082.0     0.995    219.3
2083.0     1.025    219.8
2084.0     1.053    220.2
2085.0     1.080    220.6
2086.0     1.106    220.9
2087.0     1.130    221.3
2088.0     1.153    221.6
2089.0     1.175    221.9
2090.0     1.196    222.2
2091.0     1.216    222.5
2092.0     1.235    222.8
2093.0     1.253    223.1
2094.0     1.270    223.4
2095.0     1.286    223.7
2096.0     1.301    223.9
2097.0     1.316    224.2
2098.0     1.329    224.4
2099.0     1.342    224.7
2100.0     1.354    224.9
2101.0     1.365    225.1
2102.0     1.376    225.4
2103.0     1.386    225.6
2104.0     1.395    225.8
2105.0     1.403    226.0
2106.0     1.411    226.3
2107.0     1.419    226.5

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.