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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:44:39

Orbital Elements for A2700

WDS:	A2700	WDS ID/Discoverer
P:	30.073	Orbital period (years)
a:	0.1809	Semi-major axis (arcseconds)
i:	147.5	Inclination (degrees)
Ω:	204.3	Longitude of ascending node (degrees)
T:	2020.392	Epoch of periastron passage (year)
e:	0.309	Eccentricity
ω:	176.5	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2700

Position:	235146.78-063647.0	Epoch-2000 right ascension and declination
WDS-ID:	23518-0637	WDS designation
Discoverer Code:	A2700	Discover designation and components
ADS number:	17052	Aitken Double Star catalog
HD number:	223688	HD catalog number
Hipparcos number:	117666	Hipparcos catalog number
V1:	9.57	Magnitude of the primary
V2:	9.71	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:	n	Flags

Double Star Orbit for A2700

WDS 6th Orbit including measures of A2700

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

Ephemeris of A2700

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.138    298.4
-------------------------
2010.0     0.214    179.4
2011.0     0.203    172.2
2012.0     0.190    164.1
2013.0     0.176    154.7
2014.0     0.162    143.7
2015.0     0.148    130.5
2016.0     0.136    114.8
2017.0     0.127     96.6
2018.0     0.123     76.4
2019.0     0.123     55.7
2020.0     0.124     35.2
2021.0     0.125     15.1
2022.0     0.125    355.0
2023.0     0.126    335.2
2024.0     0.130    316.0
2025.0     0.138    298.4
2026.0     0.149    283.1
2027.0     0.162    270.1
2028.0     0.176    259.1
2029.0     0.189    249.6
2030.0     0.202    241.4
2031.0     0.213    234.1
2032.0     0.222    227.4
2033.0     0.229    221.2
2034.0     0.234    215.3
2035.0     0.236    209.7
2036.0     0.237    204.0
2037.0     0.235    198.4
2038.0     0.230    192.6
2039.0     0.224    186.5

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.