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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:33:10

Orbital Elements for HDS3172

WDS:	HDS3172	WDS ID/Discoverer
P:	10.510	Orbital period (years)
a:	0.1444	Semi-major axis (arcseconds)
i:	97.4	Inclination (degrees)
Ω:	155.4	Longitude of ascending node (degrees)
T:	2017.374	Epoch of periastron passage (year)
e:	0.288	Eccentricity
ω:	325.7	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS3172

Position:	222247.28-293710.0	Epoch-2000 right ascension and declination
WDS-ID:	22228-2937	WDS designation
Discoverer Code:	HDS3172	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	212146	HD catalog number
Hipparcos number:	110483	Hipparcos catalog number
V1:	8.46	Magnitude of the primary
V2:	10.69	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS3172

WDS 6th Orbit including measures of HDS3172

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

Ephemeris of HDS3172

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.154    333.1
-------------------------
2020.0     0.022     87.4
2021.0     0.069    353.0
2022.0     0.127    343.2
2023.0     0.166    339.1
2024.0     0.177    336.2
2025.0     0.154    333.1
2026.0     0.093    327.3
2027.0     0.015    229.2
2028.0     0.092    159.1
2029.0     0.102    151.0

Disclaimer

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.