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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:38:59

Orbital Elements for ZETTRA

WDS:	ZETTRA	WDS ID/Discoverer
P:	0.035	Orbital period (years)
a:	0.00271	Semi-major axis (arcseconds)
i:	16.01	Inclination (degrees)
Ω:	2.1	Longitude of ascending node (degrees)
T:	1908.442	Epoch of periastron passage (year)
e:	0.06	Eccentricity
ω:	274.5	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 ZETTRA

Position:	162827.80-700504.8	Epoch-2000 right ascension and declination
WDS-ID:	16285-7005	WDS designation
Discoverer Code:	ZETTRA	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	147584	HD catalog number
Hipparcos number:	80686	Hipparcos catalog number
V1:	4.91	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1992	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for ZETTRA

WDS 6th Orbit including measures of ZETTRA

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

Ephemeris of ZETTRA

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.003    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.