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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:33:24

Orbital Elements for RAO27AA,AB

WDS:	RAO27AA,AB	WDS ID/Discoverer
P:	11.240	Orbital period (years)
a:	0.097	Semi-major axis (arcseconds)
i:	94.7	Inclination (degrees)
Ω:	150.7	Longitude of ascending node (degrees)
T:	2015.880	Epoch of periastron passage (year)
e:	0.403	Eccentricity
ω:	181.4	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RAO27AA,AB

Position:	222401.31+061210.2	Epoch-2000 right ascension and declination
WDS-ID:	22240+0612	WDS designation
Discoverer Code:	RAO27AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	212426	HD catalog number
Hipparcos number:	110574	Hipparcos catalog number
V1:	8.20	Magnitude of the primary
V2:	8.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for RAO27AA,AB

WDS 6th Orbit including measures of RAO27AA,AB

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

Ephemeris of RAO27AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.039    139.9
-------------------------
2020.0     0.120    152.6
2021.0     0.135    151.2
2022.0     0.134    150.0
2023.0     0.118    148.6
2024.0     0.086    146.4
2025.0     0.039    139.9
2026.0     0.020    348.2
2027.0     0.058    331.4
2028.0     0.029    320.6
2029.0     0.031    164.3

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.