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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:37:22

Orbital Elements for HDS1149

WDS:	HDS1149	WDS ID/Discoverer
P:	12.950	Orbital period (years)
a:	0.1977	Semi-major axis (arcseconds)
i:	145.2	Inclination (degrees)
Ω:	80.4	Longitude of ascending node (degrees)
T:	2011.680	Epoch of periastron passage (year)
e:	0.551	Eccentricity
ω:	61.3	Longitude of periastron (degrees)
Start-Year:	2019.0	Year
End-Year:	2031.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS1149

Position:	080319.66+525036.0	Epoch-2000 right ascension and declination
WDS-ID:	08033+5251	WDS designation
Discoverer Code:	HDS1149	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	39402	Hipparcos catalog number
V1:	12.03	Magnitude of the primary
V2:	12.34	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2009	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS1149

WDS 6th Orbit including measures of HDS1149

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

Ephemeris of HDS1149

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.080    336.6
-------------------------
2019.0     0.256    194.9
2020.0     0.238    182.7
2021.0     0.215    168.3
2022.0     0.187    149.9
2023.0     0.154    124.3
2024.0     0.110     81.3
2025.0     0.080    336.6
2026.0     0.153    274.3
2027.0     0.210    251.7
2028.0     0.245    237.4
2029.0     0.263    226.0
2030.0     0.269    215.5

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.