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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:13:28

Orbital Elements for WSI74AA,AB

WDS:	WSI74AA,AB	WDS ID/Discoverer
P:	2.661	Orbital period (years)
a:	0.0843	Semi-major axis (arcseconds)
i:	55.3	Inclination (degrees)
Ω:	146.6	Longitude of ascending node (degrees)
T:	2011.094	Epoch of periastron passage (year)
e:	0.508	Eccentricity
ω:	145.6	Longitude of periastron (degrees)
Start-Year:	2024.0	Year
End-Year:	2026.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI74AA,AB

Position:	124832.31-154310.1	Epoch-2000 right ascension and declination
WDS-ID:	12485-1543	WDS designation
Discoverer Code:	WSI74AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	111312	HD catalog number
Hipparcos number:	62505	Hipparcos catalog number
V1:	8.2	Magnitude of the primary
V2:	9.6	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:		Flags

Double Star Orbit for WSI74AA,AB

WDS 6th Orbit including measures of WSI74AA,AB

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

Ephemeris of WSI74AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.058     75.7
-------------------------
2024.0     0.071    165.8
2025.0     0.058     75.7

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.