Double Star Calculator - Orbit

Orbital Elements for STF1785
WDS: STF1785 WDS ID/Discoverer
P: 156.136 Orbital period (years)
a: 2.4432 Semi-major axis (arcseconds)
i: 47.73 Inclination (degrees)
Ω: 155.594 Longitude of ascending node (degrees)
T: 1916.730 Epoch of periastron passage (year)
e: 0.44695 Eccentricity
ω: 199.619 Longitude of periastron (degrees)
Start-Year: 1946.93225 Year
End-Year: 2103.06775 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for STF1785
Position: 134904.00+265847.7 Epoch-2000 right ascension and declination
WDS-ID: 13491+2659 WDS designation
Discoverer Code: STF1785 Discover designation and components
ADS number: 9031 Aitken Double Star catalog
HD number: 120476 HD catalog number
Hipparcos number: 67422 Hipparcos catalog number
V1: 7.36 Magnitude of the primary
V2: 8.15 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 STF1785



WDS 6th Orbit including measures of STF1785

-- 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 STF1785
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    2.492   198.06
--------------------------
1946.93    2.244   126.74
1947.93    2.307   128.34
1948.93    2.367   129.86
1949.93    2.426   131.30
1950.93    2.484   132.67
1951.93    2.540   133.98
1952.93    2.594   135.24
1953.93    2.647   136.45
1954.93    2.698   137.61
1955.93    2.748   138.72
1956.93    2.795   139.80
1957.93    2.841   140.84
1958.93    2.885   141.85
1959.93    2.928   142.83
1960.93    2.969   143.79
1961.93    3.008   144.71
1962.93    3.045   145.62
1963.93    3.081   146.50
1964.93    3.115   147.36
1965.93    3.148   148.21
1966.93    3.179   149.04
1967.93    3.208   149.85
1968.93    3.235   150.65
1969.93    3.261   151.43
1970.93    3.286   152.20
1971.93    3.308   152.96
1972.93    3.330   153.72
1973.93    3.349   154.46
1974.93    3.367   155.19
1975.93    3.384   155.92
1976.93    3.399   156.64
1977.93    3.413   157.35
1978.93    3.425   158.06
1979.93    3.435   158.77
1980.93    3.444   159.47
1981.93    3.452   160.16
1982.93    3.458   160.86
1983.93    3.463   161.55
1984.93    3.466   162.24
1985.93    3.468   162.93
1986.93    3.468   163.61
1987.93    3.467   164.30
1988.93    3.465   164.99
1989.93    3.461   165.68
1990.93    3.456   166.38
1991.93    3.450   167.07
1992.93    3.442   167.77
1993.93    3.433   168.47
1994.93    3.423   169.17
1995.93    3.411   169.88
1996.93    3.398   170.60
1997.93    3.384   171.32
1998.93    3.368   172.04
1999.93    3.352   172.78
2000.93    3.333   173.52
2001.93    3.314   174.27
2002.93    3.294   175.03
2003.93    3.272   175.79
2004.93    3.249   176.57
2005.93    3.225   177.36
2006.93    3.199   178.17
2007.93    3.173   178.98
2008.93    3.145   179.81
2009.93    3.116   180.66
2010.93    3.086   181.52
2011.93    3.055   182.40
2012.93    3.023   183.29
2013.93    2.990   184.21
2014.93    2.956   185.14
2015.93    2.921   186.10
2016.93    2.884   187.09
2017.93    2.847   188.10
2018.93    2.809   189.13
2019.93    2.770   190.20
2020.93    2.730   191.29
2021.93    2.689   192.42
2022.93    2.647   193.58
2023.93    2.605   194.78
2024.93    2.562   196.02
2025.93    2.518   197.31
2026.93    2.473   198.64
2027.93    2.428   200.02
2028.93    2.382   201.45
2029.93    2.336   202.94
2030.93    2.289   204.49
2031.93    2.243   206.10
2032.93    2.195   207.78
2033.93    2.148   209.54
2034.93    2.101   211.37
2035.93    2.054   213.29
2036.93    2.007   215.30
2037.93    1.960   217.41
2038.93    1.914   219.61
2039.93    1.869   221.93
2040.93    1.824   224.36
2041.93    1.780   226.91
2042.93    1.738   229.58
2043.93    1.697   232.39
2044.93    1.658   235.34
2045.93    1.621   238.42
2046.93    1.585   241.64
2047.93    1.553   245.01
2048.93    1.522   248.51
2049.93    1.495   252.15
2050.93    1.471   255.92
2051.93    1.449   259.81
2052.93    1.431   263.80
2053.93    1.417   267.89
2054.93    1.405   272.05
2055.93    1.397   276.27
2056.93    1.392   280.53
2057.93    1.389   284.81
2058.93    1.389   289.11
2059.93    1.391   293.39
2060.93    1.394   297.66
2061.93    1.398   301.91
2062.93    1.403   306.13
2063.93    1.406   310.33
2064.93    1.409   314.51
2065.93    1.409   318.68
2066.93    1.406   322.86
2067.93    1.400   327.06
2068.93    1.390   331.32
2069.93    1.376   335.65
2070.93    1.357   340.08
2071.93    1.334   344.65
2072.93    1.307   349.40
2073.93    1.277   354.36
2074.93    1.245   359.57
2075.93    1.212     5.06
2076.93    1.180    10.86
2077.93    1.150    16.96
2078.93    1.125    23.37
2079.93    1.106    30.03
2080.93    1.094    36.89
2081.93    1.090    43.84
2082.93    1.096    50.78
2083.93    1.112    57.58
2084.93    1.137    64.14
2085.93    1.170    70.38
2086.93    1.211    76.23
2087.93    1.259    81.66
2088.93    1.312    86.68
2089.93    1.370    91.29
2090.93    1.432    95.51
2091.93    1.497    99.37
2092.93    1.563   102.91
2093.93    1.631   106.16
2094.93    1.699   109.15
2095.93    1.768   111.91
2096.93    1.837   114.46
2097.93    1.906   116.82
2098.93    1.974   119.02
2099.93    2.041   121.08
2100.93    2.107   123.00
2101.93    2.172   124.81
2102.93    2.236   126.52






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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 16:59:19



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