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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:52:48

Orbital Elements for TOK55BA,BB

WDS:	TOK55BA,BB	WDS ID/Discoverer
P:	8.920	Orbital period (years)
a:	0.1225	Semi-major axis (arcseconds)
i:	104.1	Inclination (degrees)
Ω:	345.7	Longitude of ascending node (degrees)
T:	2015.160	Epoch of periastron passage (year)
e:	0.387	Eccentricity
ω:	342.3	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for TOK55BA,BB

Position:	175731.89-573948.1	Epoch-2000 right ascension and declination
WDS-ID:	17575-5740	WDS designation
Discoverer Code:	TOK55BA,BB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	87914	Hipparcos catalog number
V1:	10.0	Magnitude of the primary
V2:	10.5	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for TOK55BA,BB

WDS 6th Orbit including measures of TOK55BA,BB

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

Ephemeris of TOK55BA,BB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.053    323.7
-------------------------
2021.0     0.156    163.2
2022.0     0.111    155.6
2023.0     0.034    120.3
2024.0     0.068    352.4
2025.0     0.053    323.7
2026.0     0.043    211.2
2027.0     0.105    181.5
2028.0     0.149    173.1

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.