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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:45:20

Orbital Elements for WSI140

WDS:	WSI140	WDS ID/Discoverer
P:	11.770	Orbital period (years)
a:	0.217	Semi-major axis (arcseconds)
i:	0.0	Inclination (degrees)
Ω:	93.4	Longitude of ascending node (degrees)
T:	2001.980	Epoch of periastron passage (year)
e:	0.394	Eccentricity
ω:	0.0	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI140

Position:	235944.83-440459.9	Epoch-2000 right ascension and declination
WDS-ID:	23597-4405	WDS designation
Discoverer Code:	WSI140	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	13.4	Magnitude of the primary
V2:	13.9	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for WSI140

WDS 6th Orbit including measures of WSI140

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

Ephemeris of WSI140

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.140     55.2
-------------------------
2020.0     0.302    278.7
2021.0     0.291    293.7
2022.0     0.267    310.6
2023.0     0.231    331.9
2024.0     0.184      2.8
2025.0     0.140     55.2
2026.0     0.139    128.8
2027.0     0.182    182.4
2028.0     0.229    213.9
2029.0     0.266    235.5

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.