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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:04:41

Orbital Elements for CHR85AA,AB

WDS:	CHR85AA,AB	WDS ID/Discoverer
P:	13.673	Orbital period (years)
a:	0.0583	Semi-major axis (arcseconds)
i:	131.3	Inclination (degrees)
Ω:	242.3	Longitude of ascending node (degrees)
T:	2008.572	Epoch of periastron passage (year)
e:	0.022	Eccentricity
ω:	262.7	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 CHR85AA,AB

Position:	191626.78+143240.6	Epoch-2000 right ascension and declination
WDS-ID:	19164+1433	WDS designation
Discoverer Code:	CHR85AA,AB	Discover designation and components
ADS number:	12248	Aitken Double Star catalog
HD number:	180555	HD catalog number
Hipparcos number:	94720	Hipparcos catalog number
V1:	5.9	Magnitude of the primary
V2:	7.4	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for CHR85AA,AB

WDS 6th Orbit including measures of CHR85AA,AB

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

Ephemeris of CHR85AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.056    257.5
-------------------------
2019.0     0.058     65.8
2020.0     0.055     47.8
2021.0     0.047     25.6
2022.0     0.039    353.1
2023.0     0.039    312.4
2024.0     0.047    279.7
2025.0     0.056    257.5
2026.0     0.058    239.6
2027.0     0.055    221.5
2028.0     0.047    198.6
2029.0     0.040    166.3
2030.0     0.041    129.0

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.