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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:12:29

Orbital Elements for SAO88531

WDS:	SAO88531	WDS ID/Discoverer
P:	2.278	Orbital period (years)
a:	0.01495	Semi-major axis (arcseconds)
i:	36.29	Inclination (degrees)
Ω:	97.88	Longitude of ascending node (degrees)
T:	1991.867	Epoch of periastron passage (year)
e:	0.3255	Eccentricity
ω:	146.62	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 SAO88531

Position:	202003.65+233817.2	Epoch-2000 right ascension and declination
WDS-ID:	20201+2338	WDS designation
Discoverer Code:	SAO88531	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	193554	HD catalog number
Hipparcos number:	100259	Hipparcos catalog number
V1:	8.29	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for SAO88531

WDS 6th Orbit including measures of SAO88531

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

Ephemeris of SAO88531

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.019     77.6
-------------------------
2024.0     0.011    308.8
2025.0     0.019     77.6

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.