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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:22:27

Orbital Elements for HDS100AB

WDS:	HDS100AB	WDS ID/Discoverer
P:	50.910	Orbital period (years)
a:	0.158	Semi-major axis (arcseconds)
i:	103.8	Inclination (degrees)
Ω:	17.9	Longitude of ascending node (degrees)
T:	2026.660	Epoch of periastron passage (year)
e:	0.8	Eccentricity
ω:	251.5	Longitude of periastron (degrees)
Start-Year:	2000.0	Year
End-Year:	2050.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS100AB

Position:	004557.30-304233.4	Epoch-2000 right ascension and declination
WDS-ID:	00460-3043	WDS designation
Discoverer Code:	HDS100AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	4390	HD catalog number
Hipparcos number:	3952	Hipparcos catalog number
V1:	8.3	Magnitude of the primary
V2:	9.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS100AB

WDS 6th Orbit including measures of HDS100AB

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

Ephemeris of HDS100AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.058    205.1
-------------------------
2000.0     0.116    344.8
2001.0     0.112    342.8
2002.0     0.107    340.7
2003.0     0.102    338.4
2004.0     0.097    335.9
2005.0     0.092    333.0
2006.0     0.087    329.9
2007.0     0.082    326.4
2008.0     0.077    322.4
2009.0     0.073    317.9
2010.0     0.068    312.7
2011.0     0.064    307.0
2012.0     0.061    300.5
2013.0     0.058    293.2
2014.0     0.056    285.3
2015.0     0.054    277.0
2016.0     0.054    268.3
2017.0     0.055    259.8
2018.0     0.056    251.5
2019.0     0.058    243.7
2020.0     0.060    236.4
2021.0     0.063    229.7
2022.0     0.065    223.5
2023.0     0.066    217.6
2024.0     0.065    211.7
2025.0     0.058    205.1
2026.0     0.039    194.9
2027.0     0.012     58.3
2028.0     0.055     22.3
2029.0     0.082     16.9
2030.0     0.101     13.9
2031.0     0.115     11.7
2032.0     0.125      9.9
2033.0     0.132      8.4
2034.0     0.138      7.0
2035.0     0.142      5.7
2036.0     0.145      4.5
2037.0     0.147      3.4
2038.0     0.149      2.2
2039.0     0.149      1.1
2040.0     0.149    359.9
2041.0     0.148    358.8
2042.0     0.146    357.6
2043.0     0.144    356.4
2044.0     0.142    355.2
2045.0     0.139    353.9
2046.0     0.136    352.6
2047.0     0.132    351.1
2048.0     0.129    349.7
2049.0     0.125    348.1

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.