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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:20:05

Orbital Elements for A431AB

WDS:	A431AB	WDS ID/Discoverer
P:	53.300	Orbital period (years)
a:	0.362	Semi-major axis (arcseconds)
i:	109.8	Inclination (degrees)
Ω:	26.1	Longitude of ascending node (degrees)
T:	2003.750	Epoch of periastron passage (year)
e:	0.636	Eccentricity
ω:	295.2	Longitude of periastron (degrees)
Start-Year:	1999.0	Year
End-Year:	2051.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A431AB

Position:	002707.77-075233.6	Epoch-2000 right ascension and declination
WDS-ID:	00271-0753	WDS designation
Discoverer Code:	A431AB	Discover designation and components
ADS number:	363	Aitken Double Star catalog
HD number:	2333	HD catalog number
Hipparcos number:	2143	Hipparcos catalog number
V1:	8.84	Magnitude of the primary
V2:	8.95	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for A431AB

WDS 6th Orbit including measures of A431AB

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

Ephemeris of A431AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.237    258.8
-------------------------
1999.0     0.263    203.3
2000.0     0.220    199.4
2001.0     0.166    193.1
2002.0     0.102    179.6
2003.0     0.047    125.9
2004.0     0.084     51.9
2005.0     0.141     33.0
2006.0     0.178     24.0
2007.0     0.197     17.4
2008.0     0.204     11.7
2009.0     0.205      6.2
2010.0     0.201      0.6
2011.0     0.195    354.7
2012.0     0.188    348.4
2013.0     0.181    341.6
2014.0     0.175    334.3
2015.0     0.170    326.5
2016.0     0.167    318.3
2017.0     0.167    310.0
2018.0     0.169    301.8
2019.0     0.174    293.9
2020.0     0.180    286.5
2021.0     0.189    279.7
2022.0     0.200    273.6
2023.0     0.211    268.1
2024.0     0.224    263.2
2025.0     0.237    258.8
2026.0     0.251    254.9
2027.0     0.264    251.4
2028.0     0.278    248.3
2029.0     0.292    245.4
2030.0     0.305    242.8
2031.0     0.318    240.4
2032.0     0.331    238.3
2033.0     0.343    236.2
2034.0     0.354    234.3
2035.0     0.365    232.5
2036.0     0.374    230.8
2037.0     0.383    229.2
2038.0     0.390    227.7
2039.0     0.396    226.2
2040.0     0.401    224.7
2041.0     0.404    223.3
2042.0     0.406    221.9
2043.0     0.406    220.5
2044.0     0.404    219.1
2045.0     0.400    217.6
2046.0     0.393    216.2
2047.0     0.384    214.6
2048.0     0.371    213.0
2049.0     0.354    211.3
2050.0     0.333    209.3

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.