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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:31:29

Orbital Elements for TOK373

WDS:	TOK373	WDS ID/Discoverer
P:	13.100	Orbital period (years)
a:	0.182	Semi-major axis (arcseconds)
i:	96.4	Inclination (degrees)
Ω:	45.6	Longitude of ascending node (degrees)
T:	2013.530	Epoch of periastron passage (year)
e:	0.366	Eccentricity
ω:	352.3	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 TOK373

Position:	220605.33-052128.9	Epoch-2000 right ascension and declination
WDS-ID:	22061-0521	WDS designation
Discoverer Code:	TOK373	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	209779	HD catalog number
Hipparcos number:	109110	Hipparcos catalog number
V1:	7.6	Magnitude of the primary
V2:	11.3	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for TOK373

WDS 6th Orbit including measures of TOK373

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

Ephemeris of TOK373

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.018    155.3
-------------------------
2019.0     0.225    228.3
2020.0     0.246    226.6
2021.0     0.244    225.0
2022.0     0.220    223.3
2023.0     0.172    220.9
2024.0     0.100    215.5
2025.0     0.018    155.3
2026.0     0.085     52.2
2027.0     0.114     43.8
2028.0     0.058     31.0
2029.0     0.037    257.8
2030.0     0.114    235.3

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.