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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:17:42

Orbital Elements for GC18139

WDS:	GC18139	WDS ID/Discoverer
P:	3.742	Orbital period (years)
a:	0.012	Semi-major axis (arcseconds)
i:	68.9	Inclination (degrees)
Ω:	121.1	Longitude of ascending node (degrees)
T:	1983.444	Epoch of periastron passage (year)
e:	0.19	Eccentricity
ω:	166.0	Longitude of periastron (degrees)
Start-Year:	2024.0	Year
End-Year:	2026.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for GC18139

Position:	132430.54+122554.3	Epoch-2000 right ascension and declination
WDS-ID:	13245+1226	WDS designation
Discoverer Code:	GC18139	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	116594	HD catalog number
Hipparcos number:	65417	Hipparcos catalog number
V1:	6.44	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1992	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for GC18139

WDS 6th Orbit including measures of GC18139

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

Ephemeris of GC18139

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.008    317.8
-------------------------
2024.0     0.004    202.4
2025.0     0.008    317.8

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.