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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:40:13

Orbital Elements for SNA1AA,AB

WDS:	SNA1AA,AB	WDS ID/Discoverer
P:	8.610	Orbital period (years)
a:	0.01703	Semi-major axis (arcseconds)
i:	106.18	Inclination (degrees)
Ω:	293.73	Longitude of ascending node (degrees)
T:	1998.580	Epoch of periastron passage (year)
e:	0.682	Eccentricity
ω:	248.47	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for SNA1AA,AB

Position:	164120.42-484546.7	Epoch-2000 right ascension and declination
WDS-ID:	16413-4846	WDS designation
Discoverer Code:	SNA1AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	150136	HD catalog number
Hipparcos number:	81702	Hipparcos catalog number
V1:	5.71	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for SNA1AA,AB

WDS 6th Orbit including measures of SNA1AA,AB

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

Ephemeris of SNA1AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.011    296.0
-------------------------
2021.0     0.009    240.2
2022.0     0.007    199.6
2023.0     0.008    151.0
2024.0     0.008    118.9
2025.0     0.011    296.0
2026.0     0.017    284.2
2027.0     0.018    276.3
2028.0     0.015    267.4

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.