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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:47:23

Orbital Elements for HU1181

WDS:	HU1181	WDS ID/Discoverer
P:	23.300	Orbital period (years)
a:	0.16	Semi-major axis (arcseconds)
i:	70.0	Inclination (degrees)
Ω:	157.0	Longitude of ascending node (degrees)
T:	1992.000	Epoch of periastron passage (year)
e:	0.26	Eccentricity
ω:	205.0	Longitude of periastron (degrees)
Start-Year:	2014.0	Year
End-Year:	2036.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HU1181

Position:	173234.08+344447.6	Epoch-2000 right ascension and declination
WDS-ID:	17326+3445	WDS designation
Discoverer Code:	HU1181	Discover designation and components
ADS number:	10624	Aitken Double Star catalog
HD number:	159304	HD catalog number
Hipparcos number:	85846	Hipparcos catalog number
V1:	8.62	Magnitude of the primary
V2:	9.11	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 HU1181

WDS 6th Orbit including measures of HU1181

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

Ephemeris of HU1181

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.197    159.2
-------------------------
2014.0     0.121    333.7
2015.0     0.114    342.9
2016.0     0.091    355.2
2017.0     0.060     19.3
2018.0     0.047     72.6
2019.0     0.071    115.6
2020.0     0.106    133.1
2021.0     0.138    142.0
2022.0     0.164    147.7
2023.0     0.182    152.1
2024.0     0.193    155.8
2025.0     0.197    159.2
2026.0     0.194    162.6
2027.0     0.184    166.3
2028.0     0.169    170.4
2029.0     0.149    175.6
2030.0     0.124    182.6
2031.0     0.097    193.5
2032.0     0.072    212.3
2033.0     0.057    245.3
2034.0     0.064    282.9
2035.0     0.086    307.0

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.