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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 18:37:21

Orbital Elements for BLA3
WDS: BLA3 WDS ID/Discoverer
P: 4.040 Orbital period (years)
a: 0.148 Semi-major axis (arcseconds)
i: 119.5 Inclination (degrees)
Ω: 63.5 Longitude of ascending node (degrees)
T: 2005.720 Epoch of periastron passage (year)
e: 0.17 Eccentricity
ω: 299.9 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 BLA3
Position: 161705.38+551609.0 Epoch-2000 right ascension and declination
WDS-ID: 16171+5516 WDS designation
Discoverer Code: BLA3 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: 79796 Hipparcos catalog number
V1: 10.16 Magnitude of the primary
V2: 11.94 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2007 Date of last observation
Orbit grade: 2 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: n Flags

Double Star Orbit for BLA3



WDS 6th Orbit including measures of BLA3

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


Ephemeris of BLA3
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.143    234.2
-------------------------
2023.0     0.105     25.3
2024.0     0.123    277.3
2025.0     0.143    234.2
2026.0     0.092     93.8






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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