Double Star Calculator - Orbit

Orbital Elements for STT187

WDS:	STT187	WDS ID/Discoverer
P:	254.000	Orbital period (years)
a:	0.3268	Semi-major axis (arcseconds)
i:	144.6	Inclination (degrees)
Ω:	225.0	Longitude of ascending node (degrees)
T:	1934.200	Epoch of periastron passage (year)
e:	0.695	Eccentricity
ω:	88.8	Longitude of periastron (degrees)
Start-Year:	1898.0	Year
End-Year:	2152.0	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT187
Position:	080408.38+330150.8	Epoch-2000 right ascension and declination
WDS-ID:	08041+3302	WDS designation
Discoverer Code:	STT187	Discover designation and components
ADS number:	6549	Aitken Double Star catalog
HD number:	66299	HD catalog number
Hipparcos number:	39480	Hipparcos catalog number
V1:	6.94	Magnitude of the primary
V2:	8.50	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Msn1999a	Reference

Double Star Orbit for STT187

WDS 6th Orbit including measures of STT187

-- 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 STT187

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.434   331.97
--------------------------
1898.00    0.301   265.19
1899.00    0.297   264.20
1900.00    0.293   263.18
1901.00    0.289   262.13
1902.00    0.284   261.05
1903.00    0.280   259.94
1904.00    0.275   258.79
1905.00    0.271   257.60
1906.00    0.266   256.37
1907.00    0.261   255.09
1908.00    0.256   253.77
1909.00    0.251   252.39
1910.00    0.246   250.95
1911.00    0.240   249.45
1912.00    0.235   247.88
1913.00    0.229   246.23
1914.00    0.223   244.50
1915.00    0.217   242.67
1916.00    0.211   240.73
1917.00    0.204   238.67
1918.00    0.198   236.47
1919.00    0.191   234.12
1920.00    0.184   231.59
1921.00    0.176   228.85
1922.00    0.169   225.87
1923.00    0.161   222.60
1924.00    0.153   218.99
1925.00    0.144   214.96
1926.00    0.136   210.43
1927.00    0.127   205.29
1928.00    0.118   199.39
1929.00    0.110   192.56
1930.00    0.101   184.59
1931.00    0.094   175.27
1932.00    0.088   164.48
1933.00    0.083   152.31
1934.00    0.081   139.16
1935.00    0.082   125.78
1936.00    0.085   113.02
1937.00    0.091   101.49
1938.00    0.098    91.42
1939.00    0.105    82.79
1940.00    0.114    75.41
1941.00    0.123    69.07
1942.00    0.132    63.59
1943.00    0.140    58.79
1944.00    0.149    54.55
1945.00    0.157    50.77
1946.00    0.165    47.36
1947.00    0.173    44.27
1948.00    0.181    41.44
1949.00    0.188    38.84
1950.00    0.196    36.43
1951.00    0.202    34.19
1952.00    0.209    32.09
1953.00    0.216    30.13
1954.00    0.222    28.27
1955.00    0.228    26.52
1956.00    0.234    24.85
1957.00    0.240    23.27
1958.00    0.245    21.76
1959.00    0.251    20.32
1960.00    0.256    18.94
1961.00    0.261    17.61
1962.00    0.266    16.33
1963.00    0.271    15.10
1964.00    0.276    13.92
1965.00    0.280    12.77
1966.00    0.285    11.66
1967.00    0.289    10.58
1968.00    0.294     9.54
1969.00    0.298     8.53
1970.00    0.302     7.54
1971.00    0.306     6.58
1972.00    0.310     5.65
1973.00    0.314     4.73
1974.00    0.318     3.84
1975.00    0.321     2.97
1976.00    0.325     2.12
1977.00    0.328     1.29
1978.00    0.332     0.48
1979.00    0.335   359.68
1980.00    0.338   358.90
1981.00    0.342   358.13
1982.00    0.345   357.38
1983.00    0.348   356.64
1984.00    0.351   355.91
1985.00    0.354   355.20
1986.00    0.357   354.50
1987.00    0.360   353.81
1988.00    0.362   353.12
1989.00    0.365   352.45
1990.00    0.368   351.79
1991.00    0.370   351.14
1992.00    0.373   350.50
1993.00    0.376   349.87
1994.00    0.378   349.24
1995.00    0.380   348.63
1996.00    0.383   348.02
1997.00    0.385   347.42
1998.00    0.387   346.82
1999.00    0.390   346.23
2000.00    0.392   345.65
2001.00    0.394   345.08
2002.00    0.396   344.51
2003.00    0.398   343.94
2004.00    0.400   343.39
2005.00    0.402   342.83
2006.00    0.404   342.29
2007.00    0.406   341.75
2008.00    0.407   341.21
2009.00    0.409   340.68
2010.00    0.411   340.15
2011.00    0.413   339.63
2012.00    0.414   339.11
2013.00    0.416   338.59
2014.00    0.417   338.08
2015.00    0.419   337.57
2016.00    0.420   337.07
2017.00    0.422   336.57
2018.00    0.423   336.07
2019.00    0.425   335.58
2020.00    0.426   335.09
2021.00    0.427   334.60
2022.00    0.428   334.11
2023.00    0.430   333.63
2024.00    0.431   333.15
2025.00    0.432   332.68
2026.00    0.433   332.20
2027.00    0.434   331.73
2028.00    0.435   331.26
2029.00    0.436   330.79
2030.00    0.437   330.33
2031.00    0.438   329.87
2032.00    0.439   329.41
2033.00    0.440   328.95
2034.00    0.441   328.49
2035.00    0.442   328.03
2036.00    0.442   327.58
2037.00    0.443   327.13
2038.00    0.444   326.68
2039.00    0.445   326.23
2040.00    0.445   325.78
2041.00    0.446   325.33
2042.00    0.446   324.89
2043.00    0.447   324.44
2044.00    0.448   324.00
2045.00    0.448   323.55
2046.00    0.448   323.11
2047.00    0.449   322.67
2048.00    0.449   322.23
2049.00    0.450   321.79
2050.00    0.450   321.35
2051.00    0.450   320.92
2052.00    0.451   320.48
2053.00    0.451   320.04
2054.00    0.451   319.61
2055.00    0.451   319.17
2056.00    0.451   318.73
2057.00    0.451   318.30
2058.00    0.452   317.86
2059.00    0.452   317.43
2060.00    0.452   316.99
2061.00    0.452   316.56
2062.00    0.452   316.12
2063.00    0.451   315.69
2064.00    0.451   315.25
2065.00    0.451   314.82
2066.00    0.451   314.38
2067.00    0.451   313.95
2068.00    0.451   313.51
2069.00    0.450   313.07
2070.00    0.450   312.63
2071.00    0.450   312.20
2072.00    0.449   311.76
2073.00    0.449   311.32
2074.00    0.449   310.88
2075.00    0.448   310.44
2076.00    0.448   309.99
2077.00    0.447   309.55
2078.00    0.447   309.11
2079.00    0.446   308.66
2080.00    0.446   308.22
2081.00    0.445   307.77
2082.00    0.444   307.32
2083.00    0.444   306.87
2084.00    0.443   306.42
2085.00    0.442   305.97
2086.00    0.441   305.51
2087.00    0.441   305.05
2088.00    0.440   304.60
2089.00    0.439   304.14
2090.00    0.438   303.67
2091.00    0.437   303.21
2092.00    0.436   302.75
2093.00    0.435   302.28
2094.00    0.434   301.81
2095.00    0.433   301.33
2096.00    0.432   300.86
2097.00    0.430   300.38
2098.00    0.429   299.90
2099.00    0.428   299.42
2100.00    0.427   298.93
2101.00    0.426   298.45
2102.00    0.424   297.95
2103.00    0.423   297.46
2104.00    0.421   296.96
2105.00    0.420   296.46
2106.00    0.419   295.96
2107.00    0.417   295.45
2108.00    0.415   294.94
2109.00    0.414   294.42
2110.00    0.412   293.90
2111.00    0.411   293.38
2112.00    0.409   292.85
2113.00    0.407   292.32
2114.00    0.405   291.78
2115.00    0.404   291.24
2116.00    0.402   290.69
2117.00    0.400   290.14
2118.00    0.398   289.58
2119.00    0.396   289.02
2120.00    0.394   288.45
2121.00    0.392   287.87
2122.00    0.390   287.29
2123.00    0.388   286.70
2124.00    0.385   286.11
2125.00    0.383   285.51
2126.00    0.381   284.90
2127.00    0.378   284.28
2128.00    0.376   283.66
2129.00    0.374   283.03
2130.00    0.371   282.39
2131.00    0.369   281.74
2132.00    0.366   281.08
2133.00    0.363   280.42
2134.00    0.361   279.74
2135.00    0.358   279.05
2136.00    0.355   278.35
2137.00    0.352   277.64
2138.00    0.349   276.92
2139.00    0.346   276.19
2140.00    0.343   275.44
2141.00    0.340   274.68
2142.00    0.337   273.91
2143.00    0.334   273.12
2144.00    0.330   272.31
2145.00    0.327   271.49
2146.00    0.323   270.65
2147.00    0.320   269.79
2148.00    0.316   268.92
2149.00    0.313   268.02
2150.00    0.309   267.10
2151.00    0.305   266.16

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 16:04:03