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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:22:04

Orbital Elements for TOK731

WDS:	TOK731	WDS ID/Discoverer
P:	12.450	Orbital period (years)
a:	0.059	Semi-major axis (arcseconds)
i:	25.0	Inclination (degrees)
Ω:	195.6	Longitude of ascending node (degrees)
T:	2022.530	Epoch of periastron passage (year)
e:	0.624	Eccentricity
ω:	133.7	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 TOK731

Position:	212747.21-592148.7	Epoch-2000 right ascension and declination
WDS-ID:	21278-5922	WDS designation
Discoverer Code:	TOK731	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	203970	HD catalog number
Hipparcos number:	105976	Hipparcos catalog number
V1:	8.6	Magnitude of the primary
V2:	8.6	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for TOK731

WDS 6th Orbit including measures of TOK731

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

Ephemeris of TOK731

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.063    109.7
-------------------------
2019.0     0.082    176.6
2020.0     0.070    189.0
2021.0     0.052    208.2
2022.0     0.027    257.9
2023.0     0.028     31.2
2024.0     0.047     85.6
2025.0     0.063    109.7
2026.0     0.075    124.8
2027.0     0.084    136.1
2028.0     0.089    145.5
2029.0     0.091    154.2
2030.0     0.090    162.8

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.