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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:53:18

Orbital Elements for WSI65

WDS:	WSI65	WDS ID/Discoverer
P:	64.125	Orbital period (years)
a:	0.17836000000000002	Semi-major axis (arcseconds)
i:	75.9	Inclination (degrees)
Ω:	338.87	Longitude of ascending node (degrees)
T:	2003.050	Epoch of periastron passage (year)
e:	0.412	Eccentricity
ω:	115.24	Longitude of periastron (degrees)
Start-Year:	1993.0	Year
End-Year:	2057.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for WSI65

Position:	180015.80+042207.0	Epoch-2000 right ascension and declination
WDS-ID:	18003+0422	WDS designation
Discoverer Code:	WSI65	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	164284	HD catalog number
Hipparcos number:	88149	Hipparcos catalog number
V1:	5.0	Magnitude of the primary
V2:	6.5	Magnitude of the secondary
Equinox:		Equinox
Date:	2011	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for WSI65

WDS 6th Orbit including measures of WSI65

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

Ephemeris of WSI65

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.057    240.6
-------------------------
1993.0     0.162    341.5
1994.0     0.151    343.1
1995.0     0.138    345.0
1996.0     0.122    347.4
1997.0     0.104    350.5
1998.0     0.085    354.9
1999.0     0.064      2.2
2000.0     0.043     16.6
2001.0     0.028     51.7
2002.0     0.031    104.3
2003.0     0.049    130.7
2004.0     0.070    142.2
2005.0     0.089    148.6
2006.0     0.104    152.9
2007.0     0.117    156.1
2008.0     0.126    158.8
2009.0     0.131    161.2
2010.0     0.134    163.4
2011.0     0.135    165.6
2012.0     0.133    167.8
2013.0     0.130    170.1
2014.0     0.125    172.5
2015.0     0.120    175.2
2016.0     0.113    178.1
2017.0     0.106    181.4
2018.0     0.098    185.2
2019.0     0.090    189.7
2020.0     0.083    195.0
2021.0     0.075    201.4
2022.0     0.069    209.1
2023.0     0.063    218.2
2024.0     0.059    228.9
2025.0     0.057    240.6
2026.0     0.058    252.5
2027.0     0.060    263.9
2028.0     0.065    274.1
2029.0     0.071    282.7
2030.0     0.078    289.9
2031.0     0.086    295.8
2032.0     0.094    300.7
2033.0     0.103    304.8
2034.0     0.111    308.3
2035.0     0.120    311.2
2036.0     0.128    313.8
2037.0     0.137    316.1
2038.0     0.145    318.1
2039.0     0.152    319.9
2040.0     0.159    321.5
2041.0     0.166    323.0
2042.0     0.172    324.4
2043.0     0.178    325.7
2044.0     0.183    326.9
2045.0     0.188    328.0
2046.0     0.191    329.1
2047.0     0.194    330.2
2048.0     0.196    331.2
2049.0     0.198    332.3
2050.0     0.198    333.3
2051.0     0.197    334.3
2052.0     0.195    335.3
2053.0     0.192    336.4
2054.0     0.187    337.5
2055.0     0.181    338.7
2056.0     0.173    339.9

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.