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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:44:25

Orbital Elements for STT327

WDS:	STT327	WDS ID/Discoverer
P:	88.402	Orbital period (years)
a:	0.278	Semi-major axis (arcseconds)
i:	57.3	Inclination (degrees)
Ω:	146.4	Longitude of ascending node (degrees)
T:	1968.190	Epoch of periastron passage (year)
e:	0.653	Eccentricity
ω:	12.3	Longitude of periastron (degrees)
Start-Year:	1981.0	Year
End-Year:	2069.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT327

Position:	171406.83+560801.7	Epoch-2000 right ascension and declination
WDS-ID:	17141+5608	WDS designation
Discoverer Code:	STT327	Discover designation and components
ADS number:	10425	Aitken Double Star catalog
HD number:	156389	HD catalog number
Hipparcos number:	84300	Hipparcos catalog number
V1:	8.29	Magnitude of the primary
V2:	8.95	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STT327

WDS 6th Orbit including measures of STT327

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

Ephemeris of STT327

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.399    341.9
-------------------------
1981.0     0.238    304.1
1982.0     0.255    306.2
1983.0     0.271    308.1
1984.0     0.286    309.7
1985.0     0.300    311.2
1986.0     0.313    312.6
1987.0     0.326    313.8
1988.0     0.338    315.0
1989.0     0.349    316.1
1990.0     0.360    317.1
1991.0     0.370    318.1
1992.0     0.379    319.0
1993.0     0.388    319.9
1994.0     0.396    320.7
1995.0     0.404    321.5
1996.0     0.411    322.3
1997.0     0.417    323.1
1998.0     0.423    323.8
1999.0     0.428    324.5
2000.0     0.433    325.2
2001.0     0.437    325.9
2002.0     0.441    326.5
2003.0     0.445    327.2
2004.0     0.447    327.8
2005.0     0.450    328.5
2006.0     0.451    329.1
2007.0     0.453    329.7
2008.0     0.454    330.4
2009.0     0.454    331.0
2010.0     0.454    331.6
2011.0     0.454    332.2
2012.0     0.453    332.9
2013.0     0.451    333.5
2014.0     0.449    334.1
2015.0     0.447    334.8
2016.0     0.444    335.4
2017.0     0.441    336.1
2018.0     0.437    336.8
2019.0     0.433    337.4
2020.0     0.429    338.1
2021.0     0.424    338.8
2022.0     0.418    339.6
2023.0     0.413    340.3
2024.0     0.406    341.1
2025.0     0.399    341.9
2026.0     0.392    342.7
2027.0     0.384    343.5
2028.0     0.376    344.4
2029.0     0.368    345.4
2030.0     0.359    346.3
2031.0     0.349    347.4
2032.0     0.339    348.5
2033.0     0.328    349.6
2034.0     0.317    350.8
2035.0     0.306    352.2
2036.0     0.294    353.6
2037.0     0.281    355.2
2038.0     0.269    356.9
2039.0     0.255    358.7
2040.0     0.241      0.8
2041.0     0.227      3.2
2042.0     0.212      5.9
2043.0     0.197      8.9
2044.0     0.182     12.5
2045.0     0.167     16.7
2046.0     0.151     21.8
2047.0     0.137     28.1
2048.0     0.122     35.8
2049.0     0.110     45.4
2050.0     0.099     57.2
2051.0     0.093     71.3
2052.0     0.090     86.9
2053.0     0.091    102.8
2054.0     0.095    117.8
2055.0     0.098    131.6
2056.0     0.098    144.9
2057.0     0.092    159.1
2058.0     0.082    176.2
2059.0     0.073    197.8
2060.0     0.072    222.8
2061.0     0.080    245.5
2062.0     0.095    262.5
2063.0     0.114    274.3
2064.0     0.135    282.7
2065.0     0.155    288.9
2066.0     0.175    293.6
2067.0     0.195    297.4
2068.0     0.213    300.5

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.