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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 19:12:51

Orbital Elements for BLA7AA,AB
WDS: BLA7AA,AB WDS ID/Discoverer
P: 3.762 Orbital period (years)
a: 0.0487 Semi-major axis (arcseconds)
i: 75.1 Inclination (degrees)
Ω: 43.6 Longitude of ascending node (degrees)
T: 2015.640 Epoch of periastron passage (year)
e: 0.452 Eccentricity
ω: 124.2 Longitude of periastron (degrees)
Start-Year: 2024.0 Year
End-Year: 2026.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BLA7AA,AB
Position: 202100.67-144653.0 Epoch-2000 right ascension and declination
WDS-ID: 20210-1447 WDS designation
Discoverer Code: BLA7AA,AB Discover designation and components
ADS number: 13717 Aitken Double Star catalog
HD number: 193495 HD catalog number
Hipparcos number: 100345 Hipparcos catalog number
V1: 3.1 Magnitude of the primary
V2: 4.9 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 BLA7AA,AB



WDS 6th Orbit including measures of BLA7AA,AB

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


Ephemeris of BLA7AA,AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.041     21.5
-------------------------
2024.0     0.020    265.0
2025.0     0.041     21.5






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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