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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:19:05

Orbital Elements for A1803AB

WDS:	A1803AB	WDS ID/Discoverer
P:	35.660	Orbital period (years)
a:	0.189	Semi-major axis (arcseconds)
i:	95.4	Inclination (degrees)
Ω:	124.1	Longitude of ascending node (degrees)
T:	1950.700	Epoch of periastron passage (year)
e:	0.002	Eccentricity
ω:	282.0	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 A1803AB

Position:	001724.50+085234.8	Epoch-2000 right ascension and declination
WDS-ID:	00174+0853	WDS designation
Discoverer Code:	A1803AB	Discover designation and components
ADS number:	238	Aitken Double Star catalog
HD number:	1317	HD catalog number
Hipparcos number:	1392	Hipparcos catalog number
V1:	8.38	Magnitude of the primary
V2:	7.78	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1803AB

WDS 6th Orbit including measures of A1803AB

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

Ephemeris of A1803AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.127    130.0
-------------------------
2008.0     0.146    308.6
2009.0     0.165    307.2
2010.0     0.178    306.0
2011.0     0.187    305.0
2012.0     0.189    304.0
2013.0     0.186    303.1
2014.0     0.177    302.1
2015.0     0.162    300.9
2016.0     0.143    299.4
2017.0     0.119    297.4
2018.0     0.092    294.4
2019.0     0.063    288.5
2020.0     0.033    271.8
2021.0     0.019    197.0
2022.0     0.042    148.4
2023.0     0.072    137.3
2024.0     0.101    132.6
2025.0     0.127    130.0
2026.0     0.150    128.3
2027.0     0.168    126.9
2028.0     0.180    125.8
2029.0     0.187    124.8
2030.0     0.189    123.8
2031.0     0.184    122.9
2032.0     0.174    121.8
2033.0     0.159    120.6
2034.0     0.139    119.1
2035.0     0.114    116.9
2036.0     0.087    113.5
2037.0     0.057    106.6
2038.0     0.028     85.0
2039.0     0.021      1.4
2040.0     0.048    325.5
2041.0     0.077    316.3

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.