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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:28:39

Orbital Elements for HDS940BC

WDS:	HDS940BC	WDS ID/Discoverer
P:	12.200	Orbital period (years)
a:	0.0827	Semi-major axis (arcseconds)
i:	32.3	Inclination (degrees)
Ω:	54.7	Longitude of ascending node (degrees)
T:	2011.700	Epoch of periastron passage (year)
e:	0.095	Eccentricity
ω:	171.8	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS940BC

Position:	064640.72+082147.3	Epoch-2000 right ascension and declination
WDS-ID:	06467+0822	WDS designation
Discoverer Code:	HDS940BC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	49015	HD catalog number
Hipparcos number:	32475	Hipparcos catalog number
V1:	11.7	Magnitude of the primary
V2:	12.0	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS940BC

WDS 6th Orbit including measures of HDS940BC

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

Ephemeris of HDS940BC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.073    261.4
-------------------------
2019.0     0.088     73.1
2020.0     0.080     97.3
2021.0     0.071    127.5
2022.0     0.068    163.6
2023.0     0.071    199.2
2024.0     0.075    230.8
2025.0     0.073    261.4
2026.0     0.070    294.6
2027.0     0.071    329.5
2028.0     0.078      0.7
2029.0     0.086     26.1
2030.0     0.090     47.8

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.