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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 16:56:53

Orbital Elements for A2801
WDS: A2801 WDS ID/Discoverer
P: 20.633 Orbital period (years)
a: 0.16432 Semi-major axis (arcseconds)
i: 67.8 Inclination (degrees)
Ω: 154.1 Longitude of ascending node (degrees)
T: 1931.498 Epoch of periastron passage (year)
e: 0.8349 Eccentricity
ω: 67.88 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 A2801
Position: 041044.48-045228.2 Epoch-2000 right ascension and declination
WDS-ID: 04107-0452 WDS designation
Discoverer Code: A2801 Discover designation and components
ADS number: 3041 Aitken Double Star catalog
HD number: 26441 HD catalog number
Hipparcos number: 19508 Hipparcos catalog number
V1: 8.3 Magnitude of the primary
V2: 8.3 Magnitude of the secondary
Equinox: 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 A2801



WDS 6th Orbit including measures of A2801

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


Ephemeris of A2801
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.149     19.8
-------------------------
2015.0     0.089    338.0
2016.0     0.129    346.2
2017.0     0.151    351.2
2018.0     0.164    355.1
2019.0     0.171    358.6
2020.0     0.174      1.9
2021.0     0.174      5.1
2022.0     0.171      8.4
2023.0     0.165     11.9
2024.0     0.158     15.6
2025.0     0.149     19.8
2026.0     0.139     24.5
2027.0     0.127     30.1
2028.0     0.115     36.8
2029.0     0.103     45.1
2030.0     0.090     55.6
2031.0     0.079     69.4
2032.0     0.071     87.0
2033.0     0.064    108.7
2034.0     0.054    135.6






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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