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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:34:24

Orbital Elements for A2013

WDS:	A2013	WDS ID/Discoverer
P:	34.660	Orbital period (years)
a:	0.346	Semi-major axis (arcseconds)
i:	112.3	Inclination (degrees)
Ω:	91.8	Longitude of ascending node (degrees)
T:	2005.690	Epoch of periastron passage (year)
e:	0.593	Eccentricity
ω:	137.6	Longitude of periastron (degrees)
Start-Year:	2008.0	Year
End-Year:	2042.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2013

Position:	021553.38+063734.9	Epoch-2000 right ascension and declination
WDS-ID:	02159+0638	WDS designation
Discoverer Code:	A2013	Discover designation and components
ADS number:	1729	Aitken Double Star catalog
HD number:	13959	HD catalog number
Hipparcos number:	10552	Hipparcos catalog number
V1:	9.84	Magnitude of the primary
V2:	9.79	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2004	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2013

WDS 6th Orbit including measures of A2013

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

Ephemeris of A2013

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.459    107.1
-------------------------
2008.0     0.166    252.3
2009.0     0.153    237.4
2010.0     0.140    219.5
2011.0     0.135    199.1
2012.0     0.144    179.3
2013.0     0.163    162.9
2014.0     0.190    150.5
2015.0     0.219    141.4
2016.0     0.251    134.5
2017.0     0.281    129.1
2018.0     0.311    124.8
2019.0     0.340    121.2
2020.0     0.366    118.1
2021.0     0.390    115.5
2022.0     0.412    113.1
2023.0     0.430    111.0
2024.0     0.446    109.0
2025.0     0.459    107.1
2026.0     0.468    105.4
2027.0     0.474    103.6
2028.0     0.476    102.0
2029.0     0.473    100.3
2030.0     0.466     98.6
2031.0     0.454     96.8
2032.0     0.436     94.8
2033.0     0.411     92.7
2034.0     0.379     90.3
2035.0     0.338     87.3
2036.0     0.288     83.5
2037.0     0.225     77.6
2038.0     0.149     66.5
2039.0     0.073     30.3
2040.0     0.086    305.0
2041.0     0.147    275.9

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.