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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:39:32

Orbital Elements for RST321
WDS: RST321 WDS ID/Discoverer
P: 25.780 Orbital period (years)
a: 0.31 Semi-major axis (arcseconds)
i: 40.9 Inclination (degrees)
Ω: 128.6 Longitude of ascending node (degrees)
T: 2000.850 Epoch of periastron passage (year)
e: 0.219 Eccentricity
ω: 232.1 Longitude of periastron (degrees)
Start-Year: 2013.0 Year
End-Year: 2037.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST321
Position: 082504.14-490935.0 Epoch-2000 right ascension and declination
WDS-ID: 08251-4910 WDS designation
Discoverer Code: RST321 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 71386 HD catalog number
Hipparcos number: 41261 Hipparcos catalog number
V1: 8.27 Magnitude of the primary
V2: 8.94 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2014 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for RST321



WDS 6th Orbit including measures of RST321

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


Ephemeris of RST321
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.246    321.2
-------------------------
2013.0     0.334    166.0
2014.0     0.320    175.2
2015.0     0.304    185.4
2016.0     0.289    196.7
2017.0     0.276    209.1
2018.0     0.268    222.5
2019.0     0.264    236.6
2020.0     0.264    250.8
2021.0     0.267    264.9
2022.0     0.270    278.6
2023.0     0.270    292.1
2024.0     0.262    306.0
2025.0     0.246    321.2
2026.0     0.223    339.2
2027.0     0.199      1.6
2028.0     0.189     28.3
2029.0     0.199     55.1
2030.0     0.227     77.2
2031.0     0.260     94.0
2032.0     0.293    107.0
2033.0     0.319    117.5
2034.0     0.338    126.7
2035.0     0.349    135.1
2036.0     0.353    143.1






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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