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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:17:20

Orbital Elements for HDS2980

WDS:	HDS2980	WDS ID/Discoverer
P:	38.740	Orbital period (years)
a:	0.093	Semi-major axis (arcseconds)
i:	39.9	Inclination (degrees)
Ω:	152.1	Longitude of ascending node (degrees)
T:	2019.080	Epoch of periastron passage (year)
e:	0.65	Eccentricity
ω:	82.1	Longitude of periastron (degrees)
Start-Year:	2006.0	Year
End-Year:	2044.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2980

Position:	205513.68-300824.9	Epoch-2000 right ascension and declination
WDS-ID:	20552-3008	WDS designation
Discoverer Code:	HDS2980	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	199017	HD catalog number
Hipparcos number:	103264	Hipparcos catalog number
V1:	8.65	Magnitude of the primary
V2:	10.0	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 HDS2980

WDS 6th Orbit including measures of HDS2980

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

Ephemeris of HDS2980

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.089    359.7
-------------------------
2006.0     0.110     74.2
2007.0     0.107     78.1
2008.0     0.104     82.3
2009.0     0.101     86.8
2010.0     0.098     91.5
2011.0     0.094     96.6
2012.0     0.089    102.2
2013.0     0.084    108.5
2014.0     0.078    115.6
2015.0     0.071    124.1
2016.0     0.062    134.7
2017.0     0.051    149.4
2018.0     0.037    173.7
2019.0     0.025    226.0
2020.0     0.033    289.9
2021.0     0.048    319.6
2022.0     0.062    335.1
2023.0     0.073    345.4
2024.0     0.082    353.3
2025.0     0.089    359.7
2026.0     0.095      5.3
2027.0     0.100     10.2
2028.0     0.104     14.7
2029.0     0.108     18.9
2030.0     0.111     22.8
2031.0     0.113     26.5
2032.0     0.115     30.1
2033.0     0.117     33.6
2034.0     0.118     37.0
2035.0     0.118     40.4
2036.0     0.119     43.7
2037.0     0.119     47.0
2038.0     0.119     50.3
2039.0     0.118     53.7
2040.0     0.117     57.1
2041.0     0.116     60.5
2042.0     0.115     64.0
2043.0     0.113     67.6

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.