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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:29:24

Orbital Elements for HDS205

WDS:	HDS205	WDS ID/Discoverer
P:	7.766	Orbital period (years)
a:	0.1308	Semi-major axis (arcseconds)
i:	65.5	Inclination (degrees)
Ω:	198.0	Longitude of ascending node (degrees)
T:	2011.025	Epoch of periastron passage (year)
e:	0.493	Eccentricity
ω:	115.5	Longitude of periastron (degrees)
Start-Year:	2022.0	Year
End-Year:	2028.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS205

Position:	013326.53-435405.1	Epoch-2000 right ascension and declination
WDS-ID:	01334-4354	WDS designation
Discoverer Code:	HDS205	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	9619	HD catalog number
Hipparcos number:	7254	Hipparcos catalog number
V1:	8.39	Magnitude of the primary
V2:	9.22	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS205

WDS 6th Orbit including measures of HDS205

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

Ephemeris of HDS205

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.139    192.8
-------------------------
2022.0     0.088    137.3
2023.0     0.122    163.8
2024.0     0.146    179.4
2025.0     0.139    192.8
2026.0     0.068    219.2
2027.0     0.080     16.5

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.