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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:13:23

Orbital Elements for HDS2919

WDS:	HDS2919	WDS ID/Discoverer
P:	44.880	Orbital period (years)
a:	0.265	Semi-major axis (arcseconds)
i:	53.6	Inclination (degrees)
Ω:	74.2	Longitude of ascending node (degrees)
T:	2020.990	Epoch of periastron passage (year)
e:	0.625	Eccentricity
ω:	183.5	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2919

Position:	202446.66-194235.9	Epoch-2000 right ascension and declination
WDS-ID:	20248-1943	WDS designation
Discoverer Code:	HDS2919	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	194169	HD catalog number
Hipparcos number:	100685	Hipparcos catalog number
V1:	9.93	Magnitude of the primary
V2:	10.72	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2919

WDS 6th Orbit including measures of HDS2919

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

Ephemeris of HDS2919

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.126     14.2
-------------------------
2003.0     0.410     82.8
2004.0     0.401     84.4
2005.0     0.390     86.0
2006.0     0.377     87.8
2007.0     0.363     89.7
2008.0     0.346     91.8
2009.0     0.328     94.1
2010.0     0.307     96.7
2011.0     0.285     99.6
2012.0     0.261    103.2
2013.0     0.234    107.4
2014.0     0.206    112.8
2015.0     0.177    119.9
2016.0     0.147    130.0
2017.0     0.119    145.0
2018.0     0.097    167.9
2019.0     0.090    198.7
2020.0     0.096    229.6
2021.0     0.099    256.5
2022.0     0.090    285.2
2023.0     0.085    320.3
2024.0     0.098    352.8
2025.0     0.126     14.2
2026.0     0.157     27.4
2027.0     0.190     36.2
2028.0     0.220     42.4
2029.0     0.249     47.1
2030.0     0.275     50.9
2031.0     0.299     54.1
2032.0     0.321     56.8
2033.0     0.341     59.2
2034.0     0.358     61.3
2035.0     0.374     63.3
2036.0     0.387     65.1
2037.0     0.399     66.8
2038.0     0.408     68.4
2039.0     0.416     69.9
2040.0     0.422     71.4
2041.0     0.427     72.8
2042.0     0.429     74.3
2043.0     0.430     75.7
2044.0     0.429     77.1
2045.0     0.427     78.5
2046.0     0.423     80.0

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.