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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:12:01

Orbital Elements for REU1

WDS:	REU1	WDS ID/Discoverer
P:	15.826	Orbital period (years)
a:	0.9197000000000001	Semi-major axis (arcseconds)
i:	103.09	Inclination (degrees)
Ω:	143.18	Longitude of ascending node (degrees)
T:	2024.040	Epoch of periastron passage (year)
e:	0.2988	Eccentricity
ω:	349.76	Longitude of periastron (degrees)
Start-Year:	2018.0	Year
End-Year:	2032.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for REU1

Position:	123317.36+090115.8	Epoch-2000 right ascension and declination
WDS-ID:	12335+0901	WDS designation
Discoverer Code:	REU1	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	12.6	Magnitude of the primary
V2:	12.6	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for REU1

WDS 6th Orbit including measures of REU1

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

Ephemeris of REU1

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.594    135.6
-------------------------
2018.0     1.115    319.8
2019.0     0.959    316.0
2020.0     0.720    310.1
2021.0     0.411    296.2
2022.0     0.180    225.2
2023.0     0.423    160.6
2024.0     0.632    145.9
2025.0     0.594    135.6
2026.0     0.363    117.0
2027.0     0.204     45.8
2028.0     0.432    352.2
2029.0     0.710    338.7
2030.0     0.938    332.6
2031.0     1.097    328.6

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.