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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:02:10

Orbital Elements for CHR18AA,AB
WDS: CHR18AA,AB WDS ID/Discoverer
P: 18.029 Orbital period (years)
a: 0.2401 Semi-major axis (arcseconds)
i: 69.923 Inclination (degrees)
Ω: 146.734 Longitude of ascending node (degrees)
T: 2010.177 Epoch of periastron passage (year)
e: 0.0715 Eccentricity
ω: 205.7 Longitude of periastron (degrees)
Start-Year: 2016.0 Year
End-Year: 2034.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR18AA,AB
Position: 043539.23+100939.3 Epoch-2000 right ascension and declination
WDS-ID: 04357+1010 WDS designation
Discoverer Code: CHR18AA,AB Discover designation and components
ADS number: 3317 Aitken Double Star catalog
HD number: 29140 HD catalog number
Hipparcos number: 21402 Hipparcos catalog number
V1: 4.44 Magnitude of the primary
V2: 6.61 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2007 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for CHR18AA,AB



WDS 6th Orbit including measures of CHR18AA,AB

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


Ephemeris of CHR18AA,AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.172    307.2
-------------------------
2016.0     0.218    135.1
2017.0     0.248    142.3
2018.0     0.255    148.4
2019.0     0.240    154.8
2020.0     0.205    162.7
2021.0     0.156    174.9
2022.0     0.105    199.4
2023.0     0.086    248.2
2024.0     0.122    288.5
2025.0     0.172    307.2
2026.0     0.210    317.9
2027.0     0.225    326.0
2028.0     0.210    334.2
2029.0     0.170    345.1
2030.0     0.115      5.3
2031.0     0.080     52.7
2032.0     0.110    102.7
2033.0     0.167    124.1






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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