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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:41:58

Orbital Elements for SYU11AA,AB

WDS:	SYU11AA,AB	WDS ID/Discoverer
P:	9.432	Orbital period (years)
a:	0.089	Semi-major axis (arcseconds)
i:	20.0	Inclination (degrees)
Ω:	128.7	Longitude of ascending node (degrees)
T:	2024.211	Epoch of periastron passage (year)
e:	0.532	Eccentricity
ω:	20.9	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SYU11AA,AB

Position:	165720.27-534331.6	Epoch-2000 right ascension and declination
WDS-ID:	16573-5344	WDS designation
Discoverer Code:	SYU11AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.7	Magnitude of the primary
V2:	8.9	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for SYU11AA,AB

WDS 6th Orbit including measures of SYU11AA,AB

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

Ephemeris of SYU11AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.059    237.4
-------------------------
2021.0     0.123    349.7
2022.0     0.102      8.6
2023.0     0.073     40.5
2024.0     0.044    120.0
2025.0     0.059    237.4
2026.0     0.095    280.1
2027.0     0.119    301.1
2028.0     0.132    316.1

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.