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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:26:35

Orbital Elements for A2817

WDS:	A2817	WDS ID/Discoverer
P:	31.670	Orbital period (years)
a:	0.1941	Semi-major axis (arcseconds)
i:	36.5	Inclination (degrees)
Ω:	233.7	Longitude of ascending node (degrees)
T:	2015.240	Epoch of periastron passage (year)
e:	0.286	Eccentricity
ω:	143.6	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 A2817

Position:	063125.83+074920.5	Epoch-2000 right ascension and declination
WDS-ID:	06314+0749	WDS designation
Discoverer Code:	A2817	Discover designation and components
ADS number:	5159	Aitken Double Star catalog
HD number:	46055	HD catalog number
Hipparcos number:	31089	Hipparcos catalog number
V1:	9.56	Magnitude of the primary
V2:	8.89	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for A2817

WDS 6th Orbit including measures of A2817

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

Ephemeris of A2817

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.183    157.0
-------------------------
2010.0     0.159    279.0
2011.0     0.142    293.6
2012.0     0.128    311.8
2013.0     0.120    333.6
2014.0     0.120    356.6
2015.0     0.127     18.3
2016.0     0.137     37.2
2017.0     0.145     53.8
2018.0     0.150     68.9
2019.0     0.154     83.1
2020.0     0.156     96.9
2021.0     0.158    110.3
2022.0     0.162    123.2
2023.0     0.168    135.4
2024.0     0.175    146.7
2025.0     0.183    157.0
2026.0     0.192    166.4
2027.0     0.202    174.9
2028.0     0.211    182.6
2029.0     0.220    189.8
2030.0     0.227    196.4
2031.0     0.233    202.6
2032.0     0.238    208.5
2033.0     0.240    214.3
2034.0     0.240    220.0
2035.0     0.238    225.8
2036.0     0.234    231.7
2037.0     0.226    237.9
2038.0     0.216    244.6
2039.0     0.204    252.1

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.