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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:37:02

Orbital Elements for RST3936AB

WDS:	RST3936AB	WDS ID/Discoverer
P:	35.000	Orbital period (years)
a:	0.173	Semi-major axis (arcseconds)
i:	109.7	Inclination (degrees)
Ω:	263.6	Longitude of ascending node (degrees)
T:	1999.920	Epoch of periastron passage (year)
e:	0.818	Eccentricity
ω:	160.6	Longitude of periastron (degrees)
Start-Year:	2008.0	Year
End-Year:	2042.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST3936AB

Position:	161416.53-102452.0	Epoch-2000 right ascension and declination
WDS-ID:	16143-1025	WDS designation
Discoverer Code:	RST3936AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.2	Magnitude of the primary
V2:	8.4	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST3936AB

WDS 6th Orbit including measures of RST3936AB

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

Ephemeris of RST3936AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.273    265.1
-------------------------
2008.0     0.201    278.9
2009.0     0.218    277.5
2010.0     0.234    276.4
2011.0     0.248    275.3
2012.0     0.260    274.4
2013.0     0.271    273.6
2014.0     0.280    272.8
2015.0     0.287    272.0
2016.0     0.293    271.3
2017.0     0.297    270.7
2018.0     0.300    270.0
2019.0     0.301    269.3
2020.0     0.301    268.7
2021.0     0.299    268.0
2022.0     0.295    267.3
2023.0     0.289    266.6
2024.0     0.282    265.9
2025.0     0.273    265.1
2026.0     0.261    264.3
2027.0     0.247    263.4
2028.0     0.230    262.3
2029.0     0.210    261.1
2030.0     0.187    259.6
2031.0     0.159    257.6
2032.0     0.126    254.6
2033.0     0.085    249.1
2034.0     0.033    228.5
2035.0     0.032     85.4
2036.0     0.025     12.8
2037.0     0.047    312.8
2038.0     0.078    296.5
2039.0     0.108    289.5
2040.0     0.135    285.4
2041.0     0.159    282.6

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.