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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:17:49

Orbital Elements for A1609AB

WDS:	A1609AB	WDS ID/Discoverer
P:	44.240	Orbital period (years)
a:	0.321	Semi-major axis (arcseconds)
i:	26.0	Inclination (degrees)
Ω:	40.4	Longitude of ascending node (degrees)
T:	1981.240	Epoch of periastron passage (year)
e:	0.52	Eccentricity
ω:	153.0	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1609AB

Position:	132548.12+442938.3	Epoch-2000 right ascension and declination
WDS-ID:	13258+4430	WDS designation
Discoverer Code:	A1609AB	Discover designation and components
ADS number:	8901	Aitken Double Star catalog
HD number:	116878	HD catalog number
Hipparcos number:	65518	Hipparcos catalog number
V1:	9.49	Magnitude of the primary
V2:	8.79	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1989	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1609AB

WDS 6th Orbit including measures of A1609AB

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

Ephemeris of A1609AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.149    182.0
-------------------------
2003.0     0.477     14.8
2004.0     0.479     17.6
2005.0     0.479     20.4
2006.0     0.478     23.2
2007.0     0.475     26.0
2008.0     0.470     28.9
2009.0     0.463     31.9
2010.0     0.455     34.9
2011.0     0.445     38.1
2012.0     0.432     41.5
2013.0     0.418     45.0
2014.0     0.402     48.8
2015.0     0.383     53.0
2016.0     0.363     57.6
2017.0     0.340     62.9
2018.0     0.315     68.9
2019.0     0.287     76.0
2020.0     0.258     84.7
2021.0     0.228     95.6
2022.0     0.198    109.9
2023.0     0.172    129.0
2024.0     0.154    153.6
2025.0     0.149    182.0
2026.0     0.155    210.1
2027.0     0.168    234.8
2028.0     0.185    255.5
2029.0     0.204    272.6
2030.0     0.225    286.7
2031.0     0.247    298.3
2032.0     0.269    307.9
2033.0     0.291    316.1
2034.0     0.313    323.2
2035.0     0.334    329.4
2036.0     0.353    334.8
2037.0     0.371    339.7
2038.0     0.388    344.2
2039.0     0.404    348.3
2040.0     0.418    352.1
2041.0     0.431    355.7
2042.0     0.442    359.0
2043.0     0.452      2.3
2044.0     0.461      5.3
2045.0     0.468      8.3
2046.0     0.473     11.2

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.