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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:43:45

Orbital Elements for SNA9AA,AB

WDS:	SNA9AA,AB	WDS ID/Discoverer
P:	1.796	Orbital period (years)
a:	0.00344	Semi-major axis (arcseconds)
i:	142.2	Inclination (degrees)
Ω:	92.3	Longitude of ascending node (degrees)
T:	2012.382	Epoch of periastron passage (year)
e:	0.663	Eccentricity
ω:	87.7	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 SNA9AA,AB

Position:	085754.61-474415.7	Epoch-2000 right ascension and declination
WDS-ID:	08579-4744	WDS designation
Discoverer Code:	SNA9AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	6.3 k	Magnitude of the primary
V2:	7.4 k	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for SNA9AA,AB

WDS 6th Orbit including measures of SNA9AA,AB

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

Ephemeris of SNA9AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.001    304.6
-------------------------

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.