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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:20:38

Orbital Elements for ETABOO

WDS:	ETABOO	WDS ID/Discoverer
P:	1.353	Orbital period (years)
a:	0.03602	Semi-major axis (arcseconds)
i:	115.7	Inclination (degrees)
Ω:	75.2	Longitude of ascending node (degrees)
T:	1935.910	Epoch of periastron passage (year)
e:	0.26	Eccentricity
ω:	326.3	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 ETABOO

Position:	135441.12+182354.9	Epoch-2000 right ascension and declination
WDS-ID:	13547+1824	WDS designation
Discoverer Code:	ETABOO	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	121370	HD catalog number
Hipparcos number:	67927	Hipparcos catalog number
V1:	2.68	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:	n	Flags

Double Star Orbit for ETABOO

WDS 6th Orbit including measures of ETABOO

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

Ephemeris of ETABOO

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.020    217.5
-------------------------

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.