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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:23:05

Orbital Elements for HDS109

WDS:	HDS109	WDS ID/Discoverer
P:	46.640	Orbital period (years)
a:	0.253	Semi-major axis (arcseconds)
i:	133.5	Inclination (degrees)
Ω:	131.1	Longitude of ascending node (degrees)
T:	2009.690	Epoch of periastron passage (year)
e:	0.752	Eccentricity
ω:	227.5	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 HDS109

Position:	004932.74+440333.8	Epoch-2000 right ascension and declination
WDS-ID:	00495+4404	WDS designation
Discoverer Code:	HDS109	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	4712	HD catalog number
Hipparcos number:	3857	Hipparcos catalog number
V1:	8.02	Magnitude of the primary
V2:	10.32	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2012	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS109

WDS 6th Orbit including measures of HDS109

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

Ephemeris of HDS109

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.372    106.7
-------------------------
2002.0     0.203     53.2
2003.0     0.185     47.2
2004.0     0.167     40.0
2005.0     0.149     31.0
2006.0     0.131     19.5
2007.0     0.114      4.4
2008.0     0.096    344.0
2009.0     0.074    313.3
2010.0     0.047    245.8
2011.0     0.078    173.9
2012.0     0.127    151.4
2013.0     0.168    141.0
2014.0     0.203    134.4
2015.0     0.232    129.7
2016.0     0.258    126.0
2017.0     0.280    122.9
2018.0     0.298    120.2
2019.0     0.315    117.8
2020.0     0.329    115.6
2021.0     0.341    113.6
2022.0     0.351    111.8
2023.0     0.360    110.0
2024.0     0.367    108.3
2025.0     0.372    106.7
2026.0     0.377    105.1
2027.0     0.380    103.5
2028.0     0.382    102.0
2029.0     0.382    100.4
2030.0     0.382     98.9
2031.0     0.381     97.3
2032.0     0.378     95.8
2033.0     0.375     94.2
2034.0     0.370     92.6
2035.0     0.365     90.9
2036.0     0.358     89.2
2037.0     0.351     87.4
2038.0     0.343     85.6
2039.0     0.334     83.6
2040.0     0.324     81.5
2041.0     0.313     79.3
2042.0     0.301     77.0
2043.0     0.289     74.4
2044.0     0.275     71.6
2045.0     0.261     68.5
2046.0     0.246     65.0
2047.0     0.230     61.0

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.