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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:05:13

Orbital Elements for CIA2AB

WDS:	CIA2AB	WDS ID/Discoverer
P:	0.908	Orbital period (years)
a:	0.04743	Semi-major axis (arcseconds)
i:	29.48	Inclination (degrees)
Ω:	181.046	Longitude of ascending node (degrees)
T:	2018.065	Epoch of periastron passage (year)
e:	0.9322	Eccentricity
ω:	349.888	Longitude of periastron (degrees)
Start-Year:	2025.0	Year
End-Year:	2025.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CIA2AB

Position:	191939.04+371951.5	Epoch-2000 right ascension and declination
WDS-ID:	19196+3720	WDS designation
Discoverer Code:	CIA2AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	181655	HD catalog number
Hipparcos number:	94981	Hipparcos catalog number
V1:	7.0	Magnitude of the primary
V2:	7.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for CIA2AB

WDS 6th Orbit including measures of CIA2AB

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

Ephemeris of CIA2AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.087    356.6
-------------------------

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.