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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:00:39

Orbital Elements for HDS1556

WDS:	HDS1556	WDS ID/Discoverer
P:	14.950	Orbital period (years)
a:	0.1875	Semi-major axis (arcseconds)
i:	97.0	Inclination (degrees)
Ω:	109.3	Longitude of ascending node (degrees)
T:	2003.600	Epoch of periastron passage (year)
e:	0.553	Eccentricity
ω:	61.8	Longitude of periastron (degrees)
Start-Year:	2018.0	Year
End-Year:	2032.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1556

Position:	105256.71-171638.3	Epoch-2000 right ascension and declination
WDS-ID:	10529-1717	WDS designation
Discoverer Code:	HDS1556	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	94310	HD catalog number
Hipparcos number:	53206	Hipparcos catalog number
V1:	7.96	Magnitude of the primary
V2:	8.07	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:	n	Flags

Double Star Orbit for HDS1556

WDS 6th Orbit including measures of HDS1556

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

Ephemeris of HDS1556

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.174    280.0
-------------------------
2018.0     0.094    107.9
2019.0     0.025    315.2
2020.0     0.132    291.9
2021.0     0.188    288.6
2022.0     0.210    286.4
2023.0     0.212    284.5
2024.0     0.198    282.5
2025.0     0.174    280.0
2026.0     0.142    276.6
2027.0     0.104    270.8
2028.0     0.063    257.6
2029.0     0.032    209.8
2030.0     0.050    142.2
2031.0     0.088    122.9

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.