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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:09:24

Orbital Elements for TOK897

WDS:	TOK897	WDS ID/Discoverer
P:	12.260	Orbital period (years)
a:	0.062	Semi-major axis (arcseconds)
i:	52.1	Inclination (degrees)
Ω:	89.2	Longitude of ascending node (degrees)
T:	2017.920	Epoch of periastron passage (year)
e:	0.593	Eccentricity
ω:	98.4	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 TOK897

Position:	121022.15-435215.4	Epoch-2000 right ascension and declination
WDS-ID:	12104-4352	WDS designation
Discoverer Code:	TOK897	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	59341	Hipparcos catalog number
V1:	9.4	Magnitude of the primary
V2:	10.2	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for TOK897

WDS 6th Orbit including measures of TOK897

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

Ephemeris of TOK897

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.064     26.2
-------------------------
2019.0     0.043    280.4
2020.0     0.053    304.1
2021.0     0.056    323.0
2022.0     0.058    340.4
2023.0     0.059    356.7
2024.0     0.062     12.0
2025.0     0.064     26.2
2026.0     0.065     39.5
2027.0     0.065     52.6
2028.0     0.060     66.8
2029.0     0.047     85.9
2030.0     0.017    153.2

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.