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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:30:59

Orbital Elements for YSC165

WDS:	YSC165	WDS ID/Discoverer
P:	11.798	Orbital period (years)
a:	0.3067	Semi-major axis (arcseconds)
i:	38.21	Inclination (degrees)
Ω:	151.8	Longitude of ascending node (degrees)
T:	2015.026	Epoch of periastron passage (year)
e:	0.4838	Eccentricity
ω:	267.2	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 YSC165

Position:	220149.05+162802.7	Epoch-2000 right ascension and declination
WDS-ID:	22018+1628	WDS designation
Discoverer Code:	YSC165	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	108752	Hipparcos catalog number
V1:	11.3	Magnitude of the primary
V2:	11.6	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YSC165

WDS 6th Orbit including measures of YSC165

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

Ephemeris of YSC165

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.279    311.2
-------------------------
2020.0     0.358    224.0
2021.0     0.358    239.4
2022.0     0.352    255.0
2023.0     0.341    271.4
2024.0     0.320    289.4
2025.0     0.279    311.2
2026.0     0.198    345.8
2027.0     0.129     80.2
2028.0     0.232    148.5
2029.0     0.302    175.9

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.