Double Star Calculator - Orbit

Orbital Elements for STF2695
WDS: STF2695 WDS ID/Discoverer
P: 269.000 Orbital period (years)
a: 0.773 Semi-major axis (arcseconds)
i: 84.1 Inclination (degrees)
Ω: 77.4 Longitude of ascending node (degrees)
T: 2016.370 Epoch of periastron passage (year)
e: 0.431 Eccentricity
ω: 174.1 Longitude of periastron (degrees)
Start-Year: 1890.5 Year
End-Year: 2159.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF2695
Position: 203158.19+254818.1 Epoch-2000 right ascension and declination
WDS-ID: 20320+2548 WDS designation
Discoverer Code: STF2695 Discover designation and components
ADS number: 13964 Aitken Double Star catalog
HD number: 195692 HD catalog number
Hipparcos number: 101300 Hipparcos catalog number
V1: 6.58 Magnitude of the primary
V2: 8.75 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2004 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: Alz2005a Reference

Double Star Orbit for STF2695



WDS 6th Orbit including measures of STF2695

-- 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 STF2695
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.404   260.85
--------------------------
1890.50    1.103    77.32
1891.50    1.102    77.38
1892.50    1.101    77.44
1893.50    1.100    77.50
1894.50    1.099    77.56
1895.50    1.097    77.62
1896.50    1.095    77.69
1897.50    1.093    77.75
1898.50    1.091    77.81
1899.50    1.089    77.87
1900.50    1.086    77.93
1901.50    1.084    78.00
1902.50    1.081    78.06
1903.50    1.077    78.13
1904.50    1.074    78.19
1905.50    1.070    78.25
1906.50    1.066    78.32
1907.50    1.062    78.38
1908.50    1.058    78.45
1909.50    1.054    78.52
1910.50    1.049    78.58
1911.50    1.044    78.65
1912.50    1.039    78.72
1913.50    1.034    78.79
1914.50    1.028    78.86
1915.50    1.022    78.93
1916.50    1.016    79.00
1917.50    1.010    79.07
1918.50    1.004    79.15
1919.50    0.997    79.22
1920.50    0.990    79.30
1921.50    0.983    79.37
1922.50    0.976    79.45
1923.50    0.968    79.53
1924.50    0.960    79.61
1925.50    0.952    79.69
1926.50    0.944    79.77
1927.50    0.936    79.85
1928.50    0.927    79.94
1929.50    0.918    80.03
1930.50    0.909    80.12
1931.50    0.900    80.21
1932.50    0.890    80.30
1933.50    0.880    80.39
1934.50    0.870    80.49
1935.50    0.860    80.59
1936.50    0.850    80.69
1937.50    0.839    80.80
1938.50    0.828    80.90
1939.50    0.817    81.01
1940.50    0.806    81.12
1941.50    0.794    81.24
1942.50    0.782    81.36
1943.50    0.770    81.48
1944.50    0.758    81.61
1945.50    0.745    81.74
1946.50    0.732    81.88
1947.50    0.719    82.02
1948.50    0.706    82.16
1949.50    0.692    82.32
1950.50    0.679    82.47
1951.50    0.665    82.64
1952.50    0.651    82.81
1953.50    0.636    82.99
1954.50    0.621    83.18
1955.50    0.607    83.37
1956.50    0.591    83.58
1957.50    0.576    83.80
1958.50    0.560    84.03
1959.50    0.545    84.27
1960.50    0.529    84.53
1961.50    0.512    84.80
1962.50    0.496    85.09
1963.50    0.479    85.41
1964.50    0.462    85.74
1965.50    0.445    86.10
1966.50    0.428    86.49
1967.50    0.410    86.92
1968.50    0.392    87.38
1969.50    0.374    87.88
1970.50    0.356    88.44
1971.50    0.338    89.05
1972.50    0.319    89.74
1973.50    0.301    90.51
1974.50    0.282    91.39
1975.50    0.263    92.39
1976.50    0.244    93.54
1977.50    0.225    94.89
1978.50    0.206    96.49
1979.50    0.187    98.42
1980.50    0.168   100.78
1981.50    0.149   103.74
1982.50    0.131   107.53
1983.50    0.113   112.53
1984.50    0.097   119.32
1985.50    0.082   128.74
1986.50    0.070   141.79
1987.50    0.063   158.83
1988.50    0.063   178.00
1989.50    0.069   195.56
1990.50    0.080   209.23
1991.50    0.094   219.14
1992.50    0.111   226.27
1993.50    0.128   231.52
1994.50    0.146   235.48
1995.50    0.165   238.57
1996.50    0.183   241.03
1997.50    0.202   243.04
1998.50    0.220   244.71
1999.50    0.238   246.13
2000.50    0.256   247.35
2001.50    0.273   248.41
2002.50    0.290   249.34
2003.50    0.306   250.18
2004.50    0.322   250.93
2005.50    0.337   251.61
2006.50    0.351   252.24
2007.50    0.365   252.82
2008.50    0.377   253.36
2009.50    0.389   253.86
2010.50    0.399   254.34
2011.50    0.409   254.79
2012.50    0.417   255.23
2013.50    0.424   255.65
2014.50    0.430   256.06
2015.50    0.435   256.45
2016.50    0.438   256.84
2017.50    0.440   257.23
2018.50    0.441   257.61
2019.50    0.440   257.99
2020.50    0.439   258.37
2021.50    0.436   258.76
2022.50    0.432   259.16
2023.50    0.426   259.56
2024.50    0.420   259.97
2025.50    0.412   260.40
2026.50    0.404   260.85
2027.50    0.394   261.31
2028.50    0.384   261.80
2029.50    0.372   262.32
2030.50    0.360   262.87
2031.50    0.348   263.47
2032.50    0.334   264.11
2033.50    0.320   264.80
2034.50    0.305   265.56
2035.50    0.290   266.40
2036.50    0.274   267.33
2037.50    0.259   268.37
2038.50    0.242   269.56
2039.50    0.226   270.91
2040.50    0.209   272.49
2041.50    0.192   274.33
2042.50    0.175   276.53
2043.50    0.159   279.20
2044.50    0.142   282.49
2045.50    0.126   286.64
2046.50    0.111   291.97
2047.50    0.096   298.94
2048.50    0.084   308.14
2049.50    0.074   320.12
2050.50    0.069   334.82
2051.50    0.068   350.92
2052.50    0.073     6.12
2053.50    0.081    18.78
2054.50    0.093    28.59
2055.50    0.107    36.02
2056.50    0.122    41.67
2057.50    0.139    46.05
2058.50    0.155    49.50
2059.50    0.172    52.28
2060.50    0.189    54.55
2061.50    0.207    56.45
2062.50    0.224    58.06
2063.50    0.241    59.43
2064.50    0.259    60.62
2065.50    0.276    61.65
2066.50    0.293    62.57
2067.50    0.310    63.39
2068.50    0.327    64.11
2069.50    0.344    64.77
2070.50    0.361    65.37
2071.50    0.378    65.91
2072.50    0.394    66.41
2073.50    0.411    66.87
2074.50    0.427    67.29
2075.50    0.443    67.68
2076.50    0.459    68.05
2077.50    0.475    68.39
2078.50    0.490    68.70
2079.50    0.506    69.00
2080.50    0.521    69.28
2081.50    0.536    69.55
2082.50    0.551    69.80
2083.50    0.566    70.04
2084.50    0.580    70.26
2085.50    0.595    70.48
2086.50    0.609    70.68
2087.50    0.623    70.88
2088.50    0.636    71.07
2089.50    0.650    71.25
2090.50    0.663    71.42
2091.50    0.676    71.58
2092.50    0.689    71.74
2093.50    0.702    71.90
2094.50    0.715    72.04
2095.50    0.727    72.19
2096.50    0.739    72.32
2097.50    0.751    72.46
2098.50    0.763    72.59
2099.50    0.775    72.71
2100.50    0.786    72.83
2101.50    0.797    72.95
2102.50    0.808    73.07
2103.50    0.819    73.18
2104.50    0.830    73.29
2105.50    0.840    73.40
2106.50    0.850    73.50
2107.50    0.860    73.60
2108.50    0.870    73.70
2109.50    0.880    73.80
2110.50    0.889    73.89
2111.50    0.898    73.98
2112.50    0.907    74.08
2113.50    0.916    74.16
2114.50    0.925    74.25
2115.50    0.933    74.34
2116.50    0.941    74.42
2117.50    0.949    74.51
2118.50    0.957    74.59
2119.50    0.965    74.67
2120.50    0.972    74.75
2121.50    0.979    74.82
2122.50    0.986    74.90
2123.50    0.993    74.98
2124.50    1.000    75.05
2125.50    1.006    75.13
2126.50    1.012    75.20
2127.50    1.018    75.27
2128.50    1.024    75.34
2129.50    1.029    75.41
2130.50    1.035    75.48
2131.50    1.040    75.55
2132.50    1.045    75.62
2133.50    1.050    75.69
2134.50    1.054    75.75
2135.50    1.059    75.82
2136.50    1.063    75.89
2137.50    1.067    75.95
2138.50    1.071    76.02
2139.50    1.074    76.08
2140.50    1.077    76.14
2141.50    1.081    76.21
2142.50    1.084    76.27
2143.50    1.086    76.33
2144.50    1.089    76.40
2145.50    1.091    76.46
2146.50    1.093    76.52
2147.50    1.095    76.58
2148.50    1.097    76.65
2149.50    1.099    76.71
2150.50    1.100    76.77
2151.50    1.101    76.83
2152.50    1.102    76.89
2153.50    1.103    76.95
2154.50    1.103    77.01
2155.50    1.104    77.07
2156.50    1.104    77.13
2157.50    1.104    77.20
2158.50    1.103    77.26






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 18:16:05



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