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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:59:15

Orbital Elements for STF2367AB

WDS:	STF2367AB	WDS ID/Discoverer
P:	92.200	Orbital period (years)
a:	0.239	Semi-major axis (arcseconds)
i:	121.0	Inclination (degrees)
Ω:	244.0	Longitude of ascending node (degrees)
T:	1980.820	Epoch of periastron passage (year)
e:	0.91	Eccentricity
ω:	348.0	Longitude of periastron (degrees)
Start-Year:	1979.0	Year
End-Year:	2071.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STF2367AB

Position:	184116.36+301740.9	Epoch-2000 right ascension and declination
WDS-ID:	18413+3018	WDS designation
Discoverer Code:	STF2367AB	Discover designation and components
ADS number:	11579	Aitken Double Star catalog
HD number:	172865	HD catalog number
Hipparcos number:	91636	Hipparcos catalog number
V1:	7.70	Magnitude of the primary
V2:	8.03	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STF2367AB

WDS 6th Orbit including measures of STF2367AB

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

Ephemeris of STF2367AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.448     70.7
-------------------------
1979.0     0.060     35.1
1980.0     0.025      3.5
1981.0     0.022    232.3
1982.0     0.030    143.3
1983.0     0.055    113.3
1984.0     0.080    102.5
1985.0     0.103     96.7
1986.0     0.125     93.0
1987.0     0.145     90.4
1988.0     0.164     88.4
1989.0     0.181     86.8
1990.0     0.197     85.5
1991.0     0.213     84.3
1992.0     0.228     83.4
1993.0     0.242     82.5
1994.0     0.255     81.7
1995.0     0.267     81.0
1996.0     0.279     80.4
1997.0     0.291     79.8
1998.0     0.302     79.2
1999.0     0.312     78.7
2000.0     0.322     78.3
2001.0     0.331     77.8
2002.0     0.340     77.4
2003.0     0.349     77.0
2004.0     0.357     76.6
2005.0     0.364     76.2
2006.0     0.372     75.9
2007.0     0.379     75.6
2008.0     0.385     75.2
2009.0     0.392     74.9
2010.0     0.397     74.6
2011.0     0.403     74.3
2012.0     0.408     74.0
2013.0     0.413     73.7
2014.0     0.418     73.5
2015.0     0.422     73.2
2016.0     0.426     72.9
2017.0     0.429     72.7
2018.0     0.433     72.4
2019.0     0.436     72.2
2020.0     0.438     71.9
2021.0     0.441     71.7
2022.0     0.443     71.4
2023.0     0.445     71.2
2024.0     0.446     70.9
2025.0     0.448     70.7
2026.0     0.449     70.5
2027.0     0.449     70.2
2028.0     0.450     70.0
2029.0     0.450     69.8
2030.0     0.449     69.5
2031.0     0.449     69.3
2032.0     0.448     69.0
2033.0     0.447     68.8
2034.0     0.446     68.6
2035.0     0.444     68.3
2036.0     0.442     68.1
2037.0     0.440     67.8
2038.0     0.437     67.6
2039.0     0.434     67.3
2040.0     0.431     67.1
2041.0     0.427     66.8
2042.0     0.423     66.6
2043.0     0.419     66.3
2044.0     0.414     66.0
2045.0     0.409     65.7
2046.0     0.404     65.5
2047.0     0.398     65.2
2048.0     0.392     64.9
2049.0     0.385     64.5
2050.0     0.378     64.2
2051.0     0.371     63.9
2052.0     0.363     63.5
2053.0     0.355     63.2
2054.0     0.346     62.8
2055.0     0.337     62.4
2056.0     0.327     61.9
2057.0     0.317     61.5
2058.0     0.306     61.0
2059.0     0.294     60.4
2060.0     0.282     59.9
2061.0     0.269     59.2
2062.0     0.255     58.5
2063.0     0.240     57.8
2064.0     0.224     56.9
2065.0     0.207     55.9
2066.0     0.189     54.6
2067.0     0.169     53.1
2068.0     0.148     51.2
2069.0     0.124     48.6
2070.0     0.097     44.7

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.