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

Double Star Calculator - Orbit

- Revision: $Rev: 1216 $
- Report created: 2025-07-11 17:57:33

Orbital Elements for HDS1491
WDS: HDS1491 WDS ID/Discoverer
P: 22.110 Orbital period (years)
a: 0.119 Semi-major axis (arcseconds)
i: 149.6 Inclination (degrees)
Ω: 72.1 Longitude of ascending node (degrees)
T: 2024.120 Epoch of periastron passage (year)
e: 0.198 Eccentricity
ω: 183.1 Longitude of periastron (degrees)
Start-Year: 2014.0 Year
End-Year: 2036.0 Year
Epoch: 2025.0 Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1491
Position: 102124.30-261543.8 Epoch-2000 right ascension and declination
WDS-ID: 10214-2616 WDS designation
Discoverer Code: HDS1491 Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: 89817 HD catalog number
Hipparcos number: 50724 Hipparcos catalog number
V1: 8.58 Magnitude of the primary
V2: 10.13 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2022 Date of last observation
Orbit grade: 3 Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags: Flags

Double Star Orbit for HDS1491



WDS 6th Orbit including measures of HDS1491

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


Ephemeris of HDS1491
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.094    230.4
-------------------------
2014.0     0.141     60.4
2015.0     0.137     50.3
2016.0     0.131     39.4
2017.0     0.123     27.3
2018.0     0.114     13.3
2019.0     0.105    356.9
2020.0     0.099    338.0
2021.0     0.095    317.1
2022.0     0.094    295.2
2023.0     0.095    273.4
2024.0     0.095    252.0
2025.0     0.094    230.4
2026.0     0.093    208.1
2027.0     0.093    185.5
2028.0     0.097    163.9
2029.0     0.104    144.5
2030.0     0.113    127.9
2031.0     0.122    113.8
2032.0     0.131    101.7
2033.0     0.137     90.8
2034.0     0.141     80.8
2035.0     0.143     71.1






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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