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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:46:53

Orbital Elements for WSI73

WDS:	WSI73	WDS ID/Discoverer
P:	12.715	Orbital period (years)
a:	0.1294	Semi-major axis (arcseconds)
i:	85.9	Inclination (degrees)
Ω:	93.1	Longitude of ascending node (degrees)
T:	2018.150	Epoch of periastron passage (year)
e:	0.627	Eccentricity
ω:	42.7	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI73

Position:	092505.39-125800.5	Epoch-2000 right ascension and declination
WDS-ID:	09252-1258	WDS designation
Discoverer Code:	WSI73	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	81408	HD catalog number
Hipparcos number:	46191	Hipparcos catalog number
V1:	10.1	Magnitude of the primary
V2:	11.1	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for WSI73

WDS 6th Orbit including measures of WSI73

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

Ephemeris of WSI73

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.144    277.5
-------------------------
2019.0     0.056    268.9
2020.0     0.125    272.4
2021.0     0.160    273.7
2022.0     0.175    274.6
2023.0     0.175    275.4
2024.0     0.164    276.4
2025.0     0.144    277.5
2026.0     0.115    279.0
2027.0     0.079    281.9
2028.0     0.038    290.7
2029.0     0.014     53.1
2030.0     0.052     88.2

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.