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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:26:52

Orbital Elements for HDS155

WDS:	HDS155	WDS ID/Discoverer
P:	7.454	Orbital period (years)
a:	0.082	Semi-major axis (arcseconds)
i:	50.849	Inclination (degrees)
Ω:	152.306	Longitude of ascending node (degrees)
T:	1995.493	Epoch of periastron passage (year)
e:	0.744	Eccentricity
ω:	214.597	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 HDS155

Position:	011050.74+674648.2	Epoch-2000 right ascension and declination
WDS-ID:	01108+6747	WDS designation
Discoverer Code:	HDS155	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	6840	HD catalog number
Hipparcos number:	5531	Hipparcos catalog number
V1:	7.22	Magnitude of the primary
V2:	7.68	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS155

WDS 6th Orbit including measures of HDS155

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

Ephemeris of HDS155

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.029    284.7
-------------------------
2022.0     0.124    179.4
2023.0     0.103    190.0
2024.0     0.068    209.2
2025.0     0.029    284.7
2026.0     0.064    140.1
2027.0     0.111    158.1

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.