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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:39:50

Orbital Elements for STT489A

WDS:	STT489A	WDS ID/Discoverer
P:	1.524	Orbital period (years)
a:	0.011699999999999999	Semi-major axis (arcseconds)
i:	84.9	Inclination (degrees)
Ω:	58.6	Longitude of ascending node (degrees)
T:	1966.128	Epoch of periastron passage (year)
e:	0.3	Eccentricity
ω:	7.6	Longitude of periastron (degrees)
Start-Year:	2025.0	Year
End-Year:	2025.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for STT489A

Position:	230753.84+752315.3	Epoch-2000 right ascension and declination
WDS-ID:	23079+7523	WDS designation
Discoverer Code:	STT489A	Discover designation and components
ADS number:	16538	Aitken Double Star catalog
HD number:	218658	HD catalog number
Hipparcos number:	114222	Hipparcos catalog number
V1:	4.41	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for STT489A

WDS 6th Orbit including measures of STT489A

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

Ephemeris of STT489A

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.012    242.0
-------------------------

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.