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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:42:14

Orbital Elements for RST5507A

WDS:	RST5507A	WDS ID/Discoverer
P:	4.359	Orbital period (years)
a:	0.0116	Semi-major axis (arcseconds)
i:	58.0	Inclination (degrees)
Ω:	91.0	Longitude of ascending node (degrees)
T:	1993.564	Epoch of periastron passage (year)
e:	0.4	Eccentricity
ω:	103.0	Longitude of periastron (degrees)
Start-Year:	2023.0	Year
End-Year:	2027.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for RST5507A

Position:	084622.53-133251.7	Epoch-2000 right ascension and declination
WDS-ID:	08464-1333	WDS designation
Discoverer Code:	RST5507A	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	74918	HD catalog number
Hipparcos number:	43067	Hipparcos catalog number
V1:	4.33	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for RST5507A

WDS 6th Orbit including measures of RST5507A

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

Ephemeris of RST5507A

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.010    298.6
-------------------------
2023.0     0.012     75.3
2024.0     0.004    175.7
2025.0     0.010    298.6
2026.0     0.009      6.8

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.