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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:18:23

Orbital Elements for CIA21AA,AB

WDS:	CIA21AA,AB	WDS ID/Discoverer
P:	0.404	Orbital period (years)
a:	0.002971	Semi-major axis (arcseconds)
i:	83.4	Inclination (degrees)
Ω:	196.6	Longitude of ascending node (degrees)
T:	2020.438	Epoch of periastron passage (year)
e:	0.207	Eccentricity
ω:	335.4	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 CIA21AA,AB

Position:	210110.93+460920.8	Epoch-2000 right ascension and declination
WDS-ID:	21012+4609	WDS designation
Discoverer Code:	CIA21AA,AB	Discover designation and components
ADS number:	14549	Aitken Double Star catalog
HD number:	200310	HD catalog number
Hipparcos number:	103732	Hipparcos catalog number
V1:	6.7	Magnitude of the primary
V2:	6.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CIA21AA,AB

WDS 6th Orbit including measures of CIA21AA,AB

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

Ephemeris of CIA21AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.001    338.8
-------------------------

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.