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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:25:30

Orbital Elements for HDS135AB

WDS:	HDS135AB	WDS ID/Discoverer
P:	28.230	Orbital period (years)
a:	0.461	Semi-major axis (arcseconds)
i:	144.8	Inclination (degrees)
Ω:	268.6	Longitude of ascending node (degrees)
T:	2002.690	Epoch of periastron passage (year)
e:	0.671	Eccentricity
ω:	22.1	Longitude of periastron (degrees)
Start-Year:	2011.0	Year
End-Year:	2039.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS135AB

Position:	010224.56+050341.2	Epoch-2000 right ascension and declination
WDS-ID:	01024+0504	WDS designation
Discoverer Code:	HDS135AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	6101	HD catalog number
Hipparcos number:	4849	Hipparcos catalog number
V1:	8.49	Magnitude of the primary
V2:	10.07	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS135AB

WDS 6th Orbit including measures of HDS135AB

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

Ephemeris of HDS135AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.504     38.3
-------------------------
2011.0     0.675     88.1
2012.0     0.705     84.6
2013.0     0.727     81.4
2014.0     0.743     78.4
2015.0     0.752     75.5
2016.0     0.754     72.6
2017.0     0.751     69.7
2018.0     0.741     66.7
2019.0     0.726     63.7
2020.0     0.704     60.5
2021.0     0.677     57.0
2022.0     0.643     53.3
2023.0     0.603     49.0
2024.0     0.557     44.2
2025.0     0.504     38.3
2026.0     0.445     31.0
2027.0     0.379     21.3
2028.0     0.309      7.3
2029.0     0.240    345.1
2030.0     0.183    306.9
2031.0     0.146    244.2
2032.0     0.175    171.5
2033.0     0.271    136.2
2034.0     0.366    119.7
2035.0     0.449    109.8
2036.0     0.519    102.8
2037.0     0.578     97.4
2038.0     0.627     92.8

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.