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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:32:47

Orbital Elements for NLS2AA,AB
WDS: NLS2AA,AB WDS ID/Discoverer
P: 4.580 Orbital period (years)
a: 0.0797 Semi-major axis (arcseconds)
i: 55.0 Inclination (degrees)
Ω: 49.4 Longitude of ascending node (degrees)
T: 2008.410 Epoch of periastron passage (year)
e: 0.534 Eccentricity
ω: 130.0 Longitude of periastron (degrees)
Start-Year: 2023.0 Year
End-Year: 2027.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for NLS2AA,AB
Position: 153857.54-574227.3 Epoch-2000 right ascension and declination
WDS-ID: 15390-5742 WDS designation
Discoverer Code: NLS2AA,AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 139084 HD catalog number
Hipparcos number: 76629 Hipparcos catalog number
V1: 5.9 Magnitude of the primary
V2: 8.8 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2016 Date of last observation
Orbit grade: 4 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for NLS2AA,AB



WDS 6th Orbit including measures of NLS2AA,AB

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


Ephemeris of NLS2AA,AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.104     28.5
-------------------------
2023.0     0.051    299.3
2024.0     0.082      1.4
2025.0     0.104     28.5
2026.0     0.077     54.9






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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