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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:55:08

Orbital Elements for RST3157

WDS:	RST3157	WDS ID/Discoverer
P:	9.320	Orbital period (years)
a:	0.149	Semi-major axis (arcseconds)
i:	48.1	Inclination (degrees)
Ω:	63.1	Longitude of ascending node (degrees)
T:	2015.185	Epoch of periastron passage (year)
e:	0.413	Eccentricity
ω:	238.6	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 RST3157

Position:	180912.18-221100.6	Epoch-2000 right ascension and declination
WDS-ID:	18092-2211	WDS designation
Discoverer Code:	RST3157	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	165893	HD catalog number
Hipparcos number:	88932	Hipparcos catalog number
V1:	9.58	Magnitude of the primary
V2:	9.92	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST3157

WDS 6th Orbit including measures of RST3157

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

Ephemeris of RST3157

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.067    356.1
-------------------------
2021.0     0.137    137.7
2022.0     0.121    169.6
2023.0     0.117    206.7
2024.0     0.096    250.2
2025.0     0.067    356.1
2026.0     0.137     52.7
2027.0     0.174     73.8
2028.0     0.179     90.2

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.