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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:41:25

Orbital Elements for BD-042421
WDS: BD-042421 WDS ID/Discoverer
P: 18.991 Orbital period (years)
a: 0.064 Semi-major axis (arcseconds)
i: 171.1 Inclination (degrees)
Ω: 248.7 Longitude of ascending node (degrees)
T: 2005.167 Epoch of periastron passage (year)
e: 0.532 Eccentricity
ω: 325.3 Longitude of periastron (degrees)
Start-Year: 2016.0 Year
End-Year: 2034.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BD-042421
Position: 084118.53-044831.9 Epoch-2000 right ascension and declination
WDS-ID: 08413-0449 WDS designation
Discoverer Code: BD-042421 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 74014 HD catalog number
Hipparcos number: 42634 Hipparcos catalog number
V1: 7.57 Magnitude of the primary
V2: . Magnitude of the secondary
Equinox: Equinox
Date: Date of last observation
Orbit grade: 9 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for BD-042421



WDS 6th Orbit including measures of BD-042421

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


Ephemeris of BD-042421
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.035    228.5
-------------------------
2016.0     0.096     93.9
2017.0     0.094     86.7
2018.0     0.089     78.9
2019.0     0.083     70.2
2020.0     0.074     59.6
2021.0     0.064     46.1
2022.0     0.052     26.6
2023.0     0.038    354.0
2024.0     0.030    294.6
2025.0     0.035    228.5
2026.0     0.047    189.2
2027.0     0.060    166.4
2028.0     0.071    151.1
2029.0     0.079    139.6
2030.0     0.086    130.1
2031.0     0.092    122.0
2032.0     0.095    114.5
2033.0     0.097    107.5






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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