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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:19:30

Orbital Elements for HDS3015

WDS:	HDS3015	WDS ID/Discoverer
P:	6.880	Orbital period (years)
a:	0.0882	Semi-major axis (arcseconds)
i:	66.0	Inclination (degrees)
Ω:	296.3	Longitude of ascending node (degrees)
T:	2014.990	Epoch of periastron passage (year)
e:	0.566	Eccentricity
ω:	13.7	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 HDS3015

Position:	210951.57-242402.7	Epoch-2000 right ascension and declination
WDS-ID:	21099-2424	WDS designation
Discoverer Code:	HDS3015	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	201385	HD catalog number
Hipparcos number:	104476	Hipparcos catalog number
V1:	8.71	Magnitude of the primary
V2:	9.34	Magnitude of the secondary
Equinox:	2000	Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS3015

WDS 6th Orbit including measures of HDS3015

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

Ephemeris of HDS3015

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.136    119.7
-------------------------
2022.0     0.032    316.8
2023.0     0.072     97.1
2024.0     0.121    111.7
2025.0     0.136    119.7
2026.0     0.123    127.6
2027.0     0.083    140.4

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.