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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:43:28

Orbital Elements for MLR4
WDS: MLR4 WDS ID/Discoverer
P: 20.750 Orbital period (years)
a: 0.1472 Semi-major axis (arcseconds)
i: 52.53 Inclination (degrees)
Ω: 108.02 Longitude of ascending node (degrees)
T: 1989.287 Epoch of periastron passage (year)
e: 0.2915 Eccentricity
ω: 291.2 Longitude of periastron (degrees)
Start-Year: 2015.0 Year
End-Year: 2035.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for MLR4
Position: 234105.55+461306.0 Epoch-2000 right ascension and declination
WDS-ID: 23411+4613 WDS designation
Discoverer Code: MLR4 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 222516 HD catalog number
Hipparcos number: 116849 Hipparcos catalog number
V1: 7.67 Magnitude of the primary
V2: 8.03 Magnitude of the secondary
Equinox: 2000 Equinox
Date: Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for MLR4



WDS 6th Orbit including measures of MLR4

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


Ephemeris of MLR4
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.160    276.4
-------------------------
2015.0     0.125    143.6
2016.0     0.118    158.5
2017.0     0.113    175.0
2018.0     0.112    192.5
2019.0     0.116    209.5
2020.0     0.124    224.8
2021.0     0.134    238.0
2022.0     0.145    249.3
2023.0     0.154    259.0
2024.0     0.160    267.9
2025.0     0.160    276.4
2026.0     0.154    285.2
2027.0     0.140    295.3
2028.0     0.116    308.6
2029.0     0.087    330.2
2030.0     0.065     10.8
2031.0     0.075     59.5
2032.0     0.101     88.6
2033.0     0.120    106.4
2034.0     0.129    120.3






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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