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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:42:36

Orbital Elements for YSC139
WDS: YSC139 WDS ID/Discoverer
P: 3.640 Orbital period (years)
a: 0.069 Semi-major axis (arcseconds)
i: 87.9 Inclination (degrees)
Ω: 90.0 Longitude of ascending node (degrees)
T: 2013.410 Epoch of periastron passage (year)
e: 0.69 Eccentricity
ω: 274.0 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 YSC139
Position: 233441.14+374758.8 Epoch-2000 right ascension and declination
WDS-ID: 23347+3748 WDS designation
Discoverer Code: YSC139 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 221757 HD catalog number
Hipparcos number: 116360 Hipparcos catalog number
V1: 7.9 Magnitude of the primary
V2: 8.2 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2014 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for YSC139



WDS 6th Orbit including measures of YSC139

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


Ephemeris of YSC139
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.044     93.3
-------------------------
2024.0     0.048    269.1
2025.0     0.044     93.3






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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