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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:19:54

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:	1947.0	Year
End-Year:	2103.0	Year
Epoch:	2025.0	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' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF1785

WDS 6th Orbit including measures of STF1785

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

Ephemeris of STF1785

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     2.559    196.1
-------------------------
1947.0     2.249    126.9
1948.0     2.311    128.4
1949.0     2.371    130.0
1950.0     2.430    131.4
1951.0     2.488    132.8
1952.0     2.544    134.1
1953.0     2.598    135.3
1954.0     2.651    136.5
1955.0     2.702    137.7
1956.0     2.751    138.8
1957.0     2.798    139.9
1958.0     2.844    140.9
1959.0     2.888    141.9
1960.0     2.931    142.9
1961.0     2.971    143.9
1962.0     3.010    144.8
1963.0     3.048    145.7
1964.0     3.083    146.6
1965.0     3.118    147.4
1966.0     3.150    148.3
1967.0     3.181    149.1
1968.0     3.210    149.9
1969.0     3.237    150.7
1970.0     3.263    151.5
1971.0     3.287    152.3
1972.0     3.310    153.0
1973.0     3.331    153.8
1974.0     3.351    154.5
1975.0     3.369    155.2
1976.0     3.385    156.0
1977.0     3.400    156.7
1978.0     3.413    157.4
1979.0     3.425    158.1
1980.0     3.436    158.8
1981.0     3.445    159.5
1982.0     3.452    160.2
1983.0     3.458    160.9
1984.0     3.463    161.6
1985.0     3.466    162.3
1986.0     3.468    163.0
1987.0     3.468    163.7
1988.0     3.467    164.4
1989.0     3.465    165.0
1990.0     3.461    165.7
1991.0     3.456    166.4
1992.0     3.450    167.1
1993.0     3.442    167.8
1994.0     3.433    168.5
1995.0     3.422    169.2
1996.0     3.410    169.9
1997.0     3.397    170.6
1998.0     3.383    171.4
1999.0     3.367    172.1
2000.0     3.350    172.8
2001.0     3.332    173.6
2002.0     3.313    174.3
2003.0     3.292    175.1
2004.0     3.270    175.8
2005.0     3.247    176.6
2006.0     3.223    177.4
2007.0     3.198    178.2
2008.0     3.171    179.0
2009.0     3.143    179.9
2010.0     3.114    180.7
2011.0     3.084    181.6
2012.0     3.053    182.5
2013.0     3.021    183.4
2014.0     2.988    184.3
2015.0     2.954    185.2
2016.0     2.918    186.2
2017.0     2.882    187.2
2018.0     2.845    188.2
2019.0     2.806    189.2
2020.0     2.767    190.3
2021.0     2.727    191.4
2022.0     2.686    192.5
2023.0     2.644    193.7
2024.0     2.602    194.9
2025.0     2.559    196.1
2026.0     2.515    197.4
2027.0     2.470    198.7
2028.0     2.425    200.1
2029.0     2.379    201.5
2030.0     2.333    203.0
2031.0     2.286    204.6
2032.0     2.239    206.2
2033.0     2.192    207.9
2034.0     2.145    209.7
2035.0     2.098    211.5
2036.0     2.051    213.4
2037.0     2.004    215.4
2038.0     1.957    217.6
2039.0     1.911    219.8
2040.0     1.866    222.1
2041.0     1.821    224.5
2042.0     1.778    227.1
2043.0     1.735    229.8
2044.0     1.695    232.6
2045.0     1.655    235.5
2046.0     1.618    238.6
2047.0     1.583    241.9
2048.0     1.550    245.2
2049.0     1.520    248.8
2050.0     1.493    252.4
2051.0     1.469    256.2
2052.0     1.448    260.1
2053.0     1.430    264.1
2054.0     1.416    268.2
2055.0     1.404    272.3
2056.0     1.396    276.6
2057.0     1.391    280.8
2058.0     1.389    285.1
2059.0     1.389    289.4
2060.0     1.391    293.7
2061.0     1.395    298.0
2062.0     1.399    302.2
2063.0     1.403    306.4
2064.0     1.407    310.6
2065.0     1.409    314.8
2066.0     1.409    319.0
2067.0     1.406    323.1
2068.0     1.399    327.4
2069.0     1.389    331.6
2070.0     1.375    335.9
2071.0     1.355    340.4
2072.0     1.332    345.0
2073.0     1.305    349.7
2074.0     1.275    354.7
2075.0     1.243    359.9
2076.0     1.210      5.4
2077.0     1.178     11.3
2078.0     1.148     17.4
2079.0     1.123     23.8
2080.0     1.105     30.5
2081.0     1.093     37.4
2082.0     1.091     44.3
2083.0     1.097     51.2
2084.0     1.113     58.0
2085.0     1.139     64.6
2086.0     1.173     70.8
2087.0     1.214     76.6
2088.0     1.262     82.0
2089.0     1.316     87.0
2090.0     1.374     91.6
2091.0     1.436     95.8
2092.0     1.501     99.6
2093.0     1.568    103.1
2094.0     1.635    106.4
2095.0     1.704    109.3
2096.0     1.773    112.1
2097.0     1.842    114.6
2098.0     1.911    117.0
2099.0     1.978    119.2
2100.0     2.046    121.2
2101.0     2.112    123.1
2102.0     2.177    124.9

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.