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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:21:52

Orbital Elements for ZETCAP

WDS:	ZETCAP	WDS ID/Discoverer
P:	6.511	Orbital period (years)
a:	0.00856	Semi-major axis (arcseconds)
i:	111.7	Inclination (degrees)
Ω:	190.7	Longitude of ascending node (degrees)
T:	1984.809	Epoch of periastron passage (year)
e:	0.2821	Eccentricity
ω:	233.8	Longitude of periastron (degrees)
Start-Year:	2022.0	Year
End-Year:	2028.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ZETCAP

Position:	212640.03-222441.0	Epoch-2000 right ascension and declination
WDS-ID:	21267-2225	WDS designation
Discoverer Code:	ZETCAP	Discover designation and components
ADS number:	14971	Aitken Double Star catalog
HD number:	204075	HD catalog number
Hipparcos number:	105881	Hipparcos catalog number
V1:	3.75	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1993	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for ZETCAP

WDS 6th Orbit including measures of ZETCAP

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

Ephemeris of ZETCAP

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.007    203.6
-------------------------
2022.0     0.004     70.4
2023.0     0.007     20.3
2024.0     0.003    330.4
2025.0     0.007    203.6
2026.0     0.010    185.0
2027.0     0.008    167.3

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.