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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:35:50

Orbital Elements for RED9

WDS:	RED9	WDS ID/Discoverer
P:	12.749	Orbital period (years)
a:	0.23716	Semi-major axis (arcseconds)
i:	138.68	Inclination (degrees)
Ω:	29.79	Longitude of ascending node (degrees)
T:	2028.317	Epoch of periastron passage (year)
e:	0.4856	Eccentricity
ω:	355.8	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RED9

Position:	074642.56+200032.1	Epoch-2000 right ascension and declination
WDS-ID:	07467+2001	WDS designation
Discoverer Code:	RED9	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	12.23	Magnitude of the primary
V2:	12.83	Magnitude of the secondary
Equinox:		Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for RED9

WDS 6th Orbit including measures of RED9

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

Ephemeris of RED9

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.270    182.4
-------------------------
2019.0     0.267    243.1
2020.0     0.313    230.7
2021.0     0.342    221.1
2022.0     0.352    212.5
2023.0     0.344    203.9
2024.0     0.317    194.4
2025.0     0.270    182.4
2026.0     0.206    163.9
2027.0     0.137    126.5
2028.0     0.119     55.7
2029.0     0.122    345.1
2030.0     0.157    286.4

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.