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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:10:26

Orbital Elements for HDS2842

WDS:	HDS2842	WDS ID/Discoverer
P:	41.890	Orbital period (years)
a:	0.256	Semi-major axis (arcseconds)
i:	70.4	Inclination (degrees)
Ω:	71.5	Longitude of ascending node (degrees)
T:	2015.885	Epoch of periastron passage (year)
e:	0.742	Eccentricity
ω:	236.3	Longitude of periastron (degrees)
Start-Year:	2005.0	Year
End-Year:	2045.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2842

Position:	195804.28-480801.2	Epoch-2000 right ascension and declination
WDS-ID:	19581-4808	WDS designation
Discoverer Code:	HDS2842	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	188581	HD catalog number
Hipparcos number:	98274	Hipparcos catalog number
V1:	8.61	Magnitude of the primary
V2:	10.78	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2842

WDS 6th Orbit including measures of HDS2842

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

Ephemeris of HDS2842

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.302     82.2
-------------------------
2005.0     0.145    128.8
2006.0     0.131    135.6
2007.0     0.118    143.8
2008.0     0.107    154.0
2009.0     0.098    166.1
2010.0     0.094    180.0
2011.0     0.093    194.7
2012.0     0.095    209.1
2013.0     0.099    222.4
2014.0     0.100    235.0
2015.0     0.086    249.1
2016.0     0.034    288.8
2017.0     0.066     49.9
2018.0     0.129     64.2
2019.0     0.176     69.6
2020.0     0.212     73.0
2021.0     0.240     75.5
2022.0     0.261     77.5
2023.0     0.278     79.2
2024.0     0.292     80.8
2025.0     0.302     82.2
2026.0     0.309     83.6
2027.0     0.314     84.9
2028.0     0.317     86.2
2029.0     0.318     87.4
2030.0     0.318     88.7
2031.0     0.315     89.9
2032.0     0.312     91.2
2033.0     0.307     92.5
2034.0     0.301     93.9
2035.0     0.293     95.4
2036.0     0.285     96.9
2037.0     0.275     98.5
2038.0     0.265    100.2
2039.0     0.254    102.1
2040.0     0.242    104.2
2041.0     0.229    106.5
2042.0     0.215    109.0
2043.0     0.201    111.9
2044.0     0.187    115.3

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.