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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:11:08

Orbital Elements for CIA18AA,AB

WDS:	CIA18AA,AB	WDS ID/Discoverer
P:	0.309	Orbital period (years)
a:	0.0007791	Semi-major axis (arcseconds)
i:	162.08	Inclination (degrees)
Ω:	186.1	Longitude of ascending node (degrees)
T:	2019.597	Epoch of periastron passage (year)
e:	0.3646	Eccentricity
ω:	238.9	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 CIA18AA,AB

Position:	200557.32+354718.2	Epoch-2000 right ascension and declination
WDS-ID:	20060+3547	WDS designation
Discoverer Code:	CIA18AA,AB	Discover designation and components
ADS number:	13374	Aitken Double Star catalog
HD number:	190918	HD catalog number
Hipparcos number:	99002	Hipparcos catalog number
V1:	7.3	Magnitude of the primary
V2:	7.8	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CIA18AA,AB

WDS 6th Orbit including measures of CIA18AA,AB

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

Ephemeris of CIA18AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.001    127.4
-------------------------

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.