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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:29:30

Orbital Elements for HDS2146

WDS:	HDS2146	WDS ID/Discoverer
P:	31.224	Orbital period (years)
a:	0.129	Semi-major axis (arcseconds)
i:	34.6	Inclination (degrees)
Ω:	165.0	Longitude of ascending node (degrees)
T:	2014.313	Epoch of periastron passage (year)
e:	0.75	Eccentricity
ω:	242.8	Longitude of periastron (degrees)
Start-Year:	2010.0	Year
End-Year:	2040.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2146

Position:	151558.53-702448.9	Epoch-2000 right ascension and declination
WDS-ID:	15160-7025	WDS designation
Discoverer Code:	HDS2146	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	134735	HD catalog number
Hipparcos number:	74701	Hipparcos catalog number
V1:	7.31	Magnitude of the primary
V2:	7.92	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2018	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS2146

WDS 6th Orbit including measures of HDS2146

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

Ephemeris of HDS2146

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.189    209.4
-------------------------
2010.0     0.111    270.1
2011.0     0.096    279.8
2012.0     0.079    293.6
2013.0     0.059    316.0
2014.0     0.034      7.5
2015.0     0.039    120.7
2016.0     0.072    156.8
2017.0     0.099    171.3
2018.0     0.119    180.2
2019.0     0.136    186.6
2020.0     0.150    191.7
2021.0     0.161    196.0
2022.0     0.171    199.8
2023.0     0.178    203.2
2024.0     0.184    206.4
2025.0     0.189    209.4
2026.0     0.192    212.2
2027.0     0.195    215.0
2028.0     0.196    217.8
2029.0     0.196    220.5
2030.0     0.195    223.2
2031.0     0.193    226.0
2032.0     0.190    228.9
2033.0     0.185    231.8
2034.0     0.180    235.0
2035.0     0.174    238.3
2036.0     0.167    241.9
2037.0     0.159    245.8
2038.0     0.150    250.2
2039.0     0.139    255.2

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.