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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:46:15

Orbital Elements for CHR239

WDS:	CHR239	WDS ID/Discoverer
P:	10.860	Orbital period (years)
a:	0.122	Semi-major axis (arcseconds)
i:	147.0	Inclination (degrees)
Ω:	332.6	Longitude of ascending node (degrees)
T:	2013.510	Epoch of periastron passage (year)
e:	0.394	Eccentricity
ω:	260.1	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 CHR239

Position:	091904.43-412805.6	Epoch-2000 right ascension and declination
WDS-ID:	09191-4128	WDS designation
Discoverer Code:	CHR239	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	80542	HD catalog number
Hipparcos number:	45705	Hipparcos catalog number
V1:	7.5	Magnitude of the primary
V2:	8.8	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2013	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CHR239

WDS 6th Orbit including measures of CHR239

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

Ephemeris of CHR239

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.074     18.8
-------------------------
2020.0     0.139    234.2
2021.0     0.132    213.7
2022.0     0.122    190.3
2023.0     0.102    160.2
2024.0     0.070    107.4
2025.0     0.074     18.8
2026.0     0.110    332.8
2027.0     0.132    307.3
2028.0     0.142    287.3
2029.0     0.145    269.0

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.