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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 16:22:47

Orbital Elements for HR212
WDS: HR212 WDS ID/Discoverer
P: 4.786 Orbital period (years)
a: 0.0172 Semi-major axis (arcseconds)
i: 81.0 Inclination (degrees)
Ω: 80.0 Longitude of ascending node (degrees)
T: 1993.326 Epoch of periastron passage (year)
e: 0.77 Eccentricity
ω: 33.0 Longitude of periastron (degrees)
Start-Year: 2023.0 Year
End-Year: 2027.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HR212
Position: 004808.88+724028.0 Epoch-2000 right ascension and declination
WDS-ID: 00481+7240 WDS designation
Discoverer Code: HR212 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 4440 HD catalog number
Hipparcos number: 3750 Hipparcos catalog number
V1: 5.86 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: Flags

Double Star Orbit for HR212



WDS 6th Orbit including measures of HR212

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


Ephemeris of HR212
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.022    268.0
-------------------------
2023.0     0.022    261.0
2024.0     0.027    264.4
2025.0     0.022    268.0
2026.0     0.009    277.8






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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