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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:22:33

Orbital Elements for HDS101

WDS:	HDS101	WDS ID/Discoverer
P:	28.500	Orbital period (years)
a:	0.09	Semi-major axis (arcseconds)
i:	20.3	Inclination (degrees)
Ω:	13.2	Longitude of ascending node (degrees)
T:	2010.230	Epoch of periastron passage (year)
e:	0.707	Eccentricity
ω:	185.7	Longitude of periastron (degrees)
Start-Year:	2011.0	Year
End-Year:	2039.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS101

Position:	004616.11-063358.4	Epoch-2000 right ascension and declination
WDS-ID:	00463-0634	WDS designation
Discoverer Code:	HDS101	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	4393	HD catalog number
Hipparcos number:	3612	Hipparcos catalog number
V1:	8.93	Magnitude of the primary
V2:	10.27	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS101

WDS 6th Orbit including measures of HDS101

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

Ephemeris of HDS101

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.153     20.0
-------------------------
2011.0     0.033    263.5
2012.0     0.051    304.1
2013.0     0.070    323.0
2014.0     0.086    334.3
2015.0     0.099    342.3
2016.0     0.111    348.4
2017.0     0.121    353.4
2018.0     0.130    357.7
2019.0     0.137      1.5
2020.0     0.143      5.0
2021.0     0.147      8.2
2022.0     0.150     11.3
2023.0     0.152     14.3
2024.0     0.153     17.2
2025.0     0.153     20.0
2026.0     0.152     23.0
2027.0     0.150     25.9
2028.0     0.146     29.0
2029.0     0.142     32.3
2030.0     0.136     35.8
2031.0     0.128     39.7
2032.0     0.120     44.1
2033.0     0.110     49.3
2034.0     0.098     55.6
2035.0     0.084     63.9
2036.0     0.068     75.7
2037.0     0.050     95.4
2038.0     0.033    137.3

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.