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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:34:52

Orbital Elements for TOK725

WDS:	TOK725	WDS ID/Discoverer
P:	12.970	Orbital period (years)
a:	0.094	Semi-major axis (arcseconds)
i:	150.0	Inclination (degrees)
Ω:	269.5	Longitude of ascending node (degrees)
T:	2020.778	Epoch of periastron passage (year)
e:	0.617	Eccentricity
ω:	44.5	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 TOK725

Position:	155339.73-042919.1	Epoch-2000 right ascension and declination
WDS-ID:	15537-0429	WDS designation
Discoverer Code:	TOK725	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	142269	HD catalog number
Hipparcos number:	77843	Hipparcos catalog number
V1:	9.0	Magnitude of the primary
V2:	10.5	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for TOK725

WDS 6th Orbit including measures of TOK725

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

Ephemeris of TOK725

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.135     68.1
-------------------------
2019.0     0.077    347.0
2020.0     0.052    305.6
2021.0     0.033    195.3
2022.0     0.069    115.1
2023.0     0.101     91.5
2024.0     0.122     78.1
2025.0     0.135     68.1
2026.0     0.142     59.4
2027.0     0.143     51.3
2028.0     0.139     42.9
2029.0     0.130     33.7
2030.0     0.117     22.7

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.