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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:56:35

Orbital Elements for DEL3

WDS:	DEL3	WDS ID/Discoverer
P:	7.573	Orbital period (years)
a:	0.293	Semi-major axis (arcseconds)
i:	93.026	Inclination (degrees)
Ω:	68.523	Longitude of ascending node (degrees)
T:	2016.855	Epoch of periastron passage (year)
e:	0.7503	Eccentricity
ω:	273.99	Longitude of periastron (degrees)
Start-Year:	2022.0	Year
End-Year:	2028.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for DEL3

Position:	101204.68-024105.1	Epoch-2000 right ascension and declination
WDS-ID:	10121-0241	WDS designation
Discoverer Code:	DEL3	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	49969	Hipparcos catalog number
V1:	11.0	Magnitude of the primary
V2:	12.0	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for DEL3

WDS 6th Orbit including measures of DEL3

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

Ephemeris of DEL3

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.170     66.5
-------------------------
2022.0     0.152    257.3
2023.0     0.206    252.9
2024.0     0.164    249.3
2025.0     0.170     66.5
2026.0     0.154     61.6
2027.0     0.079     50.3

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.