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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:26:06

Orbital Elements for FIN309

WDS:	FIN309	WDS ID/Discoverer
P:	12.929	Orbital period (years)
a:	0.1814	Semi-major axis (arcseconds)
i:	25.9	Inclination (degrees)
Ω:	281.9	Longitude of ascending node (degrees)
T:	1995.249	Epoch of periastron passage (year)
e:	0.6428	Eccentricity
ω:	39.5	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for FIN309

Position:	144610.92-211032.6	Epoch-2000 right ascension and declination
WDS-ID:	14462-2111	WDS designation
Discoverer Code:	FIN309	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	129980	HD catalog number
Hipparcos number:	72217	Hipparcos catalog number
V1:	7.30	Magnitude of the primary
V2:	7.30	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for FIN309

WDS 6th Orbit including measures of FIN309

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

Ephemeris of FIN309

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.261    117.7
-------------------------
2019.0     0.173    186.9
2020.0     0.119    217.2
2021.0     0.065    301.7
2022.0     0.109     60.8
2023.0     0.180     92.1
2024.0     0.229    107.2
2025.0     0.261    117.7
2026.0     0.280    126.3
2027.0     0.287    134.1
2028.0     0.284    141.8
2029.0     0.270    150.0
2030.0     0.247    159.4

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.