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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:24:20

Orbital Elements for A570AB

WDS:	A570AB	WDS ID/Discoverer
P:	29.900	Orbital period (years)
a:	0.204	Semi-major axis (arcseconds)
i:	152.9	Inclination (degrees)
Ω:	15.6	Longitude of ascending node (degrees)
T:	2013.760	Epoch of periastron passage (year)
e:	0.167	Eccentricity
ω:	49.6	Longitude of periastron (degrees)
Start-Year:	2011.0	Year
End-Year:	2039.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A570AB

Position:	143220.27+264038.4	Epoch-2000 right ascension and declination
WDS-ID:	14323+2641	WDS designation
Discoverer Code:	A570AB	Discover designation and components
ADS number:	9301	Aitken Double Star catalog
HD number:	127726	HD catalog number
Hipparcos number:	71094	Hipparcos catalog number
V1:	6.61	Magnitude of the primary
V2:	7.08	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2020	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A570AB

WDS 6th Orbit including measures of A570AB

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

Ephemeris of A570AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.229    180.8
-------------------------
2011.0     0.178     12.2
2012.0     0.171    357.8
2013.0     0.164    342.1
2014.0     0.158    325.1
2015.0     0.155    307.1
2016.0     0.156    288.8
2017.0     0.162    271.3
2018.0     0.171    255.3
2019.0     0.182    241.1
2020.0     0.193    228.6
2021.0     0.204    217.5
2022.0     0.214    207.4
2023.0     0.221    198.1
2024.0     0.226    189.3
2025.0     0.229    180.8
2026.0     0.229    172.4
2027.0     0.228    164.0
2028.0     0.226    155.5
2029.0     0.222    146.7
2030.0     0.218    137.6
2031.0     0.213    128.1
2032.0     0.208    118.2
2033.0     0.203    107.8
2034.0     0.199     96.9
2035.0     0.196     85.6
2036.0     0.193     74.0
2037.0     0.191     62.1
2038.0     0.189     49.9

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.