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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 16:51:56

Orbital Elements for 5TAU
WDS: 5TAU WDS ID/Discoverer
P: 2.628 Orbital period (years)
a: 0.00425 Semi-major axis (arcseconds)
i: 36.95 Inclination (degrees)
Ω: 207.61 Longitude of ascending node (degrees)
T: 1989.054 Epoch of periastron passage (year)
e: 0.397 Eccentricity
ω: 326.32 Longitude of periastron (degrees)
Start-Year: 2024.0 Year
End-Year: 2026.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for 5TAU
Position: 033052.37+125612.1 Epoch-2000 right ascension and declination
WDS-ID: 03309+1256 WDS designation
Discoverer Code: 5TAU Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 21754 HD catalog number
Hipparcos number: 16369 Hipparcos catalog number
V1: 4.14 Magnitude of the primary
V2: . Magnitude of the secondary
Equinox: Equinox
Date: 1991 Date of last observation
Orbit grade: 9 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for 5TAU



WDS 6th Orbit including measures of 5TAU

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


Ephemeris of 5TAU
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.005     26.1
-------------------------
2024.0     0.004    320.4
2025.0     0.005     26.1






Disclaimer
This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. The Double Star Calculator and the results generated are licensed under CC BY-NC-SA 4.0.


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.


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