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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:11:26

Orbital Elements for STT400

WDS:	STT400	WDS ID/Discoverer
P:	85.610	Orbital period (years)
a:	0.449	Semi-major axis (arcseconds)
i:	116.4	Inclination (degrees)
Ω:	142.2	Longitude of ascending node (degrees)
T:	1970.270	Epoch of periastron passage (year)
e:	0.488	Eccentricity
ω:	339.4	Longitude of periastron (degrees)
Start-Year:	1983.0	Year
End-Year:	2067.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT400

Position:	201013.32+435644.2	Epoch-2000 right ascension and declination
WDS-ID:	20102+4357	WDS designation
Discoverer Code:	STT400	Discover designation and components
ADS number:	13461	Aitken Double Star catalog
HD number:	191854	HD catalog number
Hipparcos number:	99376	Hipparcos catalog number
V1:	7.60	Magnitude of the primary
V2:	9.83	Magnitude of the secondary
Equinox:	2000	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 STT400

WDS 6th Orbit including measures of STT400

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

Ephemeris of STT400

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.630    322.2
-------------------------
1983.0     0.185     50.9
1984.0     0.195     41.7
1985.0     0.208     33.6
1986.0     0.224     26.5
1987.0     0.242     20.4
1988.0     0.261     15.2
1989.0     0.281     10.7
1990.0     0.301      6.8
1991.0     0.321      3.4
1992.0     0.342      0.4
1993.0     0.362    357.8
1994.0     0.382    355.4
1995.0     0.402    353.3
1996.0     0.421    351.3
1997.0     0.439    349.5
1998.0     0.457    347.9
1999.0     0.474    346.4
2000.0     0.491    345.0
2001.0     0.506    343.6
2002.0     0.522    342.4
2003.0     0.536    341.2
2004.0     0.549    340.1
2005.0     0.562    339.0
2006.0     0.574    338.0
2007.0     0.585    337.0
2008.0     0.595    336.1
2009.0     0.605    335.2
2010.0     0.613    334.3
2011.0     0.621    333.4
2012.0     0.628    332.6
2013.0     0.634    331.7
2014.0     0.639    330.9
2015.0     0.643    330.1
2016.0     0.646    329.3
2017.0     0.648    328.6
2018.0     0.649    327.8
2019.0     0.650    327.0
2020.0     0.649    326.2
2021.0     0.647    325.4
2022.0     0.644    324.6
2023.0     0.641    323.8
2024.0     0.636    323.0
2025.0     0.630    322.2
2026.0     0.623    321.4
2027.0     0.615    320.5
2028.0     0.605    319.6
2029.0     0.595    318.7
2030.0     0.583    317.8
2031.0     0.571    316.8
2032.0     0.556    315.8
2033.0     0.541    314.7
2034.0     0.524    313.5
2035.0     0.506    312.3
2036.0     0.487    310.9
2037.0     0.466    309.5
2038.0     0.444    307.9
2039.0     0.421    306.1
2040.0     0.396    304.2
2041.0     0.370    301.9
2042.0     0.342    299.3
2043.0     0.314    296.3
2044.0     0.284    292.6
2045.0     0.253    288.0
2046.0     0.223    282.2
2047.0     0.193    274.5
2048.0     0.166    264.2
2049.0     0.143    250.2
2050.0     0.130    232.3
2051.0     0.129    212.2
2052.0     0.139    193.6
2053.0     0.159    178.7
2054.0     0.181    167.2
2055.0     0.202    158.2
2056.0     0.220    150.9
2057.0     0.232    144.4
2058.0     0.238    138.5
2059.0     0.237    132.7
2060.0     0.232    126.8
2061.0     0.224    120.4
2062.0     0.213    113.5
2063.0     0.202    105.9
2064.0     0.191     97.3
2065.0     0.183     87.9
2066.0     0.178     77.7

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.