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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:23:48

Orbital Elements for HDS2031

WDS:	HDS2031	WDS ID/Discoverer
P:	31.340	Orbital period (years)
a:	0.183	Semi-major axis (arcseconds)
i:	104.2	Inclination (degrees)
Ω:	245.1	Longitude of ascending node (degrees)
T:	2009.260	Epoch of periastron passage (year)
e:	0.5	Eccentricity
ω:	133.3	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2031

Position:	142608.03-653624.1	Epoch-2000 right ascension and declination
WDS-ID:	14261-6536	WDS designation
Discoverer Code:	HDS2031	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	8.76	Magnitude of the primary
V2:	9.42	Magnitude of the secondary
Equinox:		Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2031

WDS 6th Orbit including measures of HDS2031

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

Ephemeris of HDS2031

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.196    259.5
-------------------------
2010.0     0.091     69.7
2011.0     0.107     61.6
2012.0     0.106     54.5
2013.0     0.094     46.4
2014.0     0.078     35.2
2015.0     0.062     18.1
2016.0     0.053    352.6
2017.0     0.055    323.7
2018.0     0.068    301.5
2019.0     0.086    287.5
2020.0     0.106    278.6
2021.0     0.126    272.5
2022.0     0.146    268.0
2023.0     0.164    264.6
2024.0     0.181    261.9
2025.0     0.196    259.5
2026.0     0.208    257.5
2027.0     0.219    255.7
2028.0     0.227    254.1
2029.0     0.232    252.6
2030.0     0.234    251.1
2031.0     0.233    249.6
2032.0     0.228    248.0
2033.0     0.219    246.4
2034.0     0.204    244.6
2035.0     0.185    242.4
2036.0     0.158    239.6
2037.0     0.124    235.5
2038.0     0.082    227.6
2039.0     0.036    199.5

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.