Double Star Calculator - Orbit

Orbital Elements for STF1909

WDS:	STF1909	WDS ID/Discoverer
P:	214.763	Orbital period (years)
a:	3.70131	Semi-major axis (arcseconds)
i:	83.708	Inclination (degrees)
Ω:	56.678	Longitude of ascending node (degrees)
T:	2011.970	Epoch of periastron passage (year)
e:	0.5145	Eccentricity
ω:	39.146	Longitude of periastron (degrees)
Start-Year:	1917.6186	Year
End-Year:	2132.3814	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF1909
Position:	150347.30+473914.6	Epoch-2000 right ascension and declination
WDS-ID:	15038+4739	WDS designation
Discoverer Code:	STF1909	Discover designation and components
ADS number:	9494	Aitken Double Star catalog
HD number:	133640	HD catalog number
Hipparcos number:	73695	Hipparcos catalog number
V1:	5.20	Magnitude of the primary
V2:	6.10	Magnitude of the secondary
Equinox:		Equinox
Date:	2015	Date of last observation
Orbit grade:	2	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 STF1909

WDS 6th Orbit including measures of STF1909

-- 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 STF1909

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.915   221.46
--------------------------
1917.62    3.782   243.47
1918.62    3.731   243.62
1919.62    3.678   243.78
1920.62    3.625   243.94
1921.62    3.570   244.11
1922.62    3.515   244.28
1923.62    3.459   244.46
1924.62    3.402   244.64
1925.62    3.344   244.83
1926.62    3.286   245.03
1927.62    3.226   245.23
1928.62    3.166   245.44
1929.62    3.104   245.66
1930.62    3.042   245.89
1931.62    2.980   246.13
1932.62    2.916   246.37
1933.62    2.852   246.63
1934.62    2.786   246.91
1935.62    2.720   247.19
1936.62    2.654   247.49
1937.62    2.586   247.80
1938.62    2.518   248.14
1939.62    2.449   248.49
1940.62    2.380   248.86
1941.62    2.310   249.25
1942.62    2.239   249.67
1943.62    2.168   250.11
1944.62    2.096   250.58
1945.62    2.023   251.09
1946.62    1.950   251.64
1947.62    1.877   252.23
1948.62    1.802   252.87
1949.62    1.728   253.56
1950.62    1.653   254.32
1951.62    1.578   255.14
1952.62    1.503   256.05
1953.62    1.427   257.06
1954.62    1.351   258.18
1955.62    1.276   259.43
1956.62    1.200   260.84
1957.62    1.125   262.44
1958.62    1.050   264.27
1959.62    0.976   266.37
1960.62    0.903   268.82
1961.62    0.832   271.69
1962.62    0.762   275.10
1963.62    0.696   279.17
1964.62    0.633   284.07
1965.62    0.576   290.00
1966.62    0.525   297.16
1967.62    0.485   305.66
1968.62    0.456   315.47
1969.62    0.442   326.24
1970.62    0.444   337.31
1971.62    0.462   347.90
1972.62    0.493   357.42
1973.62    0.537     5.59
1974.62    0.589    12.44
1975.62    0.647    18.12
1976.62    0.710    22.82
1977.62    0.777    26.73
1978.62    0.846    30.02
1979.62    0.916    32.80
1980.62    0.988    35.19
1981.62    1.059    37.25
1982.62    1.131    39.05
1983.62    1.203    40.64
1984.62    1.273    42.04
1985.62    1.343    43.31
1986.62    1.411    44.44
1987.62    1.478    45.48
1988.62    1.543    46.43
1989.62    1.605    47.30
1990.62    1.665    48.10
1991.62    1.722    48.86
1992.62    1.775    49.56
1993.62    1.825    50.23
1994.62    1.871    50.86
1995.62    1.911    51.46
1996.62    1.947    52.04
1997.62    1.976    52.60
1998.62    2.000    53.15
1999.62    2.016    53.68
2000.62    2.024    54.21
2001.62    2.024    54.74
2002.62    2.015    55.27
2003.62    1.996    55.80
2004.62    1.967    56.35
2005.62    1.927    56.92
2006.62    1.875    57.52
2007.62    1.812    58.15
2008.62    1.736    58.84
2009.62    1.649    59.59
2010.62    1.550    60.43
2011.62    1.440    61.40
2012.62    1.320    62.53
2013.62    1.191    63.90
2014.62    1.053    65.62
2015.62    0.910    67.87
2016.62    0.762    70.99
2017.62    0.612    75.62
2018.62    0.465    83.23
2019.62    0.330    97.42
2020.62    0.237   126.09
2021.62    0.243   166.88
2022.62    0.342   193.87
2023.62    0.478   207.18
2024.62    0.627   214.38
2025.62    0.780   218.80
2026.62    0.933   221.76
2027.62    1.085   223.89
2028.62    1.234   225.50
2029.62    1.381   226.77
2030.62    1.525   227.79
2031.62    1.666   228.64
2032.62    1.803   229.36
2033.62    1.937   229.98
2034.62    2.067   230.52
2035.62    2.194   230.99
2036.62    2.317   231.42
2037.62    2.436   231.80
2038.62    2.552   232.15
2039.62    2.665   232.47
2040.62    2.774   232.76
2041.62    2.879   233.03
2042.62    2.981   233.28
2043.62    3.080   233.51
2044.62    3.176   233.73
2045.62    3.269   233.94
2046.62    3.358   234.14
2047.62    3.445   234.33
2048.62    3.528   234.50
2049.62    3.609   234.67
2050.62    3.687   234.83
2051.62    3.761   234.99
2052.62    3.834   235.14
2053.62    3.903   235.28
2054.62    3.970   235.42
2055.62    4.034   235.56
2056.62    4.096   235.69
2057.62    4.155   235.82
2058.62    4.212   235.94
2059.62    4.267   236.06
2060.62    4.319   236.18
2061.62    4.369   236.29
2062.62    4.416   236.40
2063.62    4.462   236.51
2064.62    4.505   236.62
2065.62    4.546   236.72
2066.62    4.585   236.83
2067.62    4.622   236.93
2068.62    4.657   237.03
2069.62    4.690   237.13
2070.62    4.721   237.23
2071.62    4.751   237.32
2072.62    4.778   237.42
2073.62    4.803   237.51
2074.62    4.827   237.60
2075.62    4.849   237.70
2076.62    4.869   237.79
2077.62    4.887   237.88
2078.62    4.904   237.97
2079.62    4.919   238.06
2080.62    4.932   238.15
2081.62    4.944   238.24
2082.62    4.954   238.32
2083.62    4.962   238.41
2084.62    4.969   238.50
2085.62    4.974   238.59
2086.62    4.978   238.67
2087.62    4.980   238.76
2088.62    4.981   238.85
2089.62    4.980   238.93
2090.62    4.978   239.02
2091.62    4.975   239.11
2092.62    4.970   239.20
2093.62    4.963   239.28
2094.62    4.956   239.37
2095.62    4.946   239.46
2096.62    4.936   239.55
2097.62    4.924   239.64
2098.62    4.911   239.73
2099.62    4.897   239.82
2100.62    4.881   239.91
2101.62    4.864   240.00
2102.62    4.846   240.09
2103.62    4.826   240.18
2104.62    4.805   240.27
2105.62    4.783   240.37
2106.62    4.760   240.46
2107.62    4.736   240.56
2108.62    4.710   240.65
2109.62    4.684   240.75
2110.62    4.656   240.85
2111.62    4.627   240.95
2112.62    4.597   241.05
2113.62    4.565   241.16
2114.62    4.533   241.26
2115.62    4.499   241.37
2116.62    4.465   241.47
2117.62    4.429   241.58
2118.62    4.392   241.69
2119.62    4.354   241.81
2120.62    4.316   241.92
2121.62    4.276   242.04
2122.62    4.235   242.16
2123.62    4.193   242.28
2124.62    4.150   242.40
2125.62    4.106   242.53
2126.62    4.061   242.66
2127.62    4.015   242.79
2128.62    3.968   242.93
2129.62    3.920   243.07
2130.62    3.871   243.21
2131.62    3.821   243.35

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 17:12:04