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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:43:32

Orbital Elements for HU1176AB

WDS:	HU1176AB	WDS ID/Discoverer
P:	8.136	Orbital period (years)
a:	0.10863	Semi-major axis (arcseconds)
i:	121.221	Inclination (degrees)
Ω:	309.3	Longitude of ascending node (degrees)
T:	1975.424	Epoch of periastron passage (year)
e:	0.5338	Eccentricity
ω:	233.81	Longitude of periastron (degrees)
Start-Year:	2021.0	Year
End-Year:	2029.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU1176AB

Position:	170802.08+355606.8	Epoch-2000 right ascension and declination
WDS-ID:	17080+3556	WDS designation
Discoverer Code:	HU1176AB	Discover designation and components
ADS number:	10360	Aitken Double Star catalog
HD number:	155103	HD catalog number
Hipparcos number:	83838	Hipparcos catalog number
V1:	6.1	Magnitude of the primary
V2:	6.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	1	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HU1176AB

WDS 6th Orbit including measures of HU1176AB

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

Ephemeris of HU1176AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.070    328.1
-------------------------
2021.0     0.099    258.2
2022.0     0.074    226.5
2023.0     0.066    176.5
2024.0     0.054    121.5
2025.0     0.070    328.1
2026.0     0.124    304.3
2027.0     0.137    291.4
2028.0     0.127    278.6

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.