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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:29:17

Orbital Elements for HDS947AB

WDS:	HDS947AB	WDS ID/Discoverer
P:	47.850	Orbital period (years)
a:	0.168	Semi-major axis (arcseconds)
i:	55.6	Inclination (degrees)
Ω:	22.5	Longitude of ascending node (degrees)
T:	2016.040	Epoch of periastron passage (year)
e:	0.212	Eccentricity
ω:	231.8	Longitude of periastron (degrees)
Start-Year:	2002.0	Year
End-Year:	2048.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS947AB

Position:	064955.68-280557.4	Epoch-2000 right ascension and declination
WDS-ID:	06499-2806	WDS designation
Discoverer Code:	HDS947AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	49996	HD catalog number
Hipparcos number:	32767	Hipparcos catalog number
V1:	10.64	Magnitude of the primary
V2:	10.65	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS947AB

WDS 6th Orbit including measures of HDS947AB

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

Ephemeris of HDS947AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.141    359.8
-------------------------
2002.0     0.111    137.6
2003.0     0.115    146.8
2004.0     0.120    155.4
2005.0     0.126    163.2
2006.0     0.131    170.3
2007.0     0.137    176.8
2008.0     0.141    182.9
2009.0     0.144    188.6
2010.0     0.145    194.3
2011.0     0.143    199.9
2012.0     0.139    205.7
2013.0     0.133    212.1
2014.0     0.124    219.1
2015.0     0.113    227.5
2016.0     0.101    237.7
2017.0     0.090    250.6
2018.0     0.081    266.8
2019.0     0.078    285.7
2020.0     0.080    304.8
2021.0     0.088    321.5
2022.0     0.100    334.8
2023.0     0.114    345.1
2024.0     0.127    353.2
2025.0     0.141    359.8
2026.0     0.152      5.2
2027.0     0.163      9.9
2028.0     0.171     14.1
2029.0     0.178     17.9
2030.0     0.184     21.5
2031.0     0.187     24.9
2032.0     0.189     28.3
2033.0     0.189     31.5
2034.0     0.187     34.9
2035.0     0.185     38.2
2036.0     0.180     41.8
2037.0     0.175     45.5
2038.0     0.169     49.4
2039.0     0.162     53.7
2040.0     0.155     58.3
2041.0     0.147     63.5
2042.0     0.139     69.3
2043.0     0.131     75.7
2044.0     0.124     82.9
2045.0     0.118     91.0
2046.0     0.113     99.9
2047.0     0.109    109.4

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.