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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:40:32

Orbital Elements for YSC155

WDS:	YSC155	WDS ID/Discoverer
P:	10.793	Orbital period (years)
a:	0.066	Semi-major axis (arcseconds)
i:	116.2	Inclination (degrees)
Ω:	149.2	Longitude of ascending node (degrees)
T:	2021.643	Epoch of periastron passage (year)
e:	0.742	Eccentricity
ω:	13.9	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 YSC155

Position:	164301.31-085704.4	Epoch-2000 right ascension and declination
WDS-ID:	16430-0857	WDS designation
Discoverer Code:	YSC155	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	150686	HD catalog number
Hipparcos number:	81843	Hipparcos catalog number
V1:	8.9	Magnitude of the primary
V2:	10.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YSC155

WDS 6th Orbit including measures of YSC155

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

Ephemeris of YSC155

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.103    330.2
-------------------------
2020.0     0.051    300.2
2021.0     0.018    251.8
2022.0     0.013     41.8
2023.0     0.057    343.4
2024.0     0.086    334.9
2025.0     0.103    330.2
2026.0     0.111    326.5
2027.0     0.112    323.1
2028.0     0.106    319.5
2029.0     0.094    315.3

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.