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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:32:52

Orbital Elements for ALPTUC

WDS:	ALPTUC	WDS ID/Discoverer
P:	11.494	Orbital period (years)
a:	0.03234	Semi-major axis (arcseconds)
i:	113.0	Inclination (degrees)
Ω:	262.0	Longitude of ascending node (degrees)
T:	1989.920	Epoch of periastron passage (year)
e:	0.38	Eccentricity
ω:	76.0	Longitude of periastron (degrees)
Start-Year:	2020.0	Year
End-Year:	2030.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for ALPTUC

Position:	221830.18-601534.2	Epoch-2000 right ascension and declination
WDS-ID:	22185-6016	WDS designation
Discoverer Code:	ALPTUC	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	211416	HD catalog number
Hipparcos number:	110130	Hipparcos catalog number
V1:	2.86	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:		Equinox
Date:	1991	Date of last observation
Orbit grade:	9	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for ALPTUC

WDS 6th Orbit including measures of ALPTUC

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

Ephemeris of ALPTUC

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.013    117.4
-------------------------
2020.0     0.017    334.5
2021.0     0.022    302.1
2022.0     0.026    281.7
2023.0     0.027    265.6
2024.0     0.015    239.6
2025.0     0.013    117.4
2026.0     0.028     86.3
2027.0     0.033     74.1
2028.0     0.032     63.3
2029.0     0.027     49.8

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.