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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:12:54

Orbital Elements for HDS2907
WDS: HDS2907 WDS ID/Discoverer
P: 9.886 Orbital period (years)
a: 0.1948 Semi-major axis (arcseconds)
i: 48.8 Inclination (degrees)
Ω: 32.7 Longitude of ascending node (degrees)
T: 2017.514 Epoch of periastron passage (year)
e: 0.651 Eccentricity
ω: 194.0 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 HDS2907
Position: 202110.95-514728.6 Epoch-2000 right ascension and declination
WDS-ID: 20212-5147 WDS designation
Discoverer Code: HDS2907 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 100356 Hipparcos catalog number
V1: 10.86 Magnitude of the primary
V2: 11.32 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: Flags

Double Star Orbit for HDS2907



WDS 6th Orbit including measures of HDS2907

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


Ephemeris of HDS2907
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.220     65.0
-------------------------
2021.0     0.301     31.8
2022.0     0.317     38.9
2023.0     0.309     45.9
2024.0     0.276     53.9
2025.0     0.220     65.0
2026.0     0.140     87.1
2027.0     0.072    166.0
2028.0     0.079    325.9






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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