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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:27:33

Orbital Elements for HDS2108AB

WDS:	HDS2108AB	WDS ID/Discoverer
P:	43.600	Orbital period (years)
a:	0.2164	Semi-major axis (arcseconds)
i:	123.9	Inclination (degrees)
Ω:	22.6	Longitude of ascending node (degrees)
T:	2014.660	Epoch of periastron passage (year)
e:	0.475	Eccentricity
ω:	136.9	Longitude of periastron (degrees)
Start-Year:	2004.0	Year
End-Year:	2046.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2108AB

Position:	145612.99+174453.0	Epoch-2000 right ascension and declination
WDS-ID:	14562+1745	WDS designation
Discoverer Code:	HDS2108AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	73085	Hipparcos catalog number
V1:	11.80	Magnitude of the primary
V2:	12.31	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2108AB

WDS 6th Orbit including measures of HDS2108AB

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

Ephemeris of HDS2108AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.141    108.7
-------------------------
2004.0     0.257     22.6
2005.0     0.244     19.6
2006.0     0.228     16.2
2007.0     0.210     12.2
2008.0     0.188      7.5
2009.0     0.164      1.3
2010.0     0.136    352.8
2011.0     0.107    339.8
2012.0     0.081    317.8
2013.0     0.070    282.7
2014.0     0.080    247.0
2015.0     0.101    223.3
2016.0     0.119    207.7
2017.0     0.130    195.6
2018.0     0.134    184.8
2019.0     0.134    174.2
2020.0     0.132    163.4
2021.0     0.129    152.3
2022.0     0.129    140.9
2023.0     0.130    129.5
2024.0     0.135    118.7
2025.0     0.141    108.7
2026.0     0.150     99.7
2027.0     0.160     91.8
2028.0     0.171     84.9
2029.0     0.183     78.9
2030.0     0.195     73.6
2031.0     0.207     68.9
2032.0     0.219     64.7
2033.0     0.230     60.9
2034.0     0.241     57.5
2035.0     0.250     54.4
2036.0     0.259     51.4
2037.0     0.267     48.7
2038.0     0.273     46.1
2039.0     0.279     43.6
2040.0     0.283     41.2
2041.0     0.285     38.9
2042.0     0.286     36.5
2043.0     0.285     34.2
2044.0     0.283     31.9
2045.0     0.278     29.5

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.