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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:48:15

Orbital Elements for A1765

WDS:	A1765	WDS ID/Discoverer
P:	28.060	Orbital period (years)
a:	0.179	Semi-major axis (arcseconds)
i:	117.2	Inclination (degrees)
Ω:	131.5	Longitude of ascending node (degrees)
T:	1994.860	Epoch of periastron passage (year)
e:	0.408	Eccentricity
ω:	268.3	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 A1765

Position:	093751.67+455413.1	Epoch-2000 right ascension and declination
WDS-ID:	09379+4554	WDS designation
Discoverer Code:	A1765	Discover designation and components
ADS number:	7457	Aitken Double Star catalog
HD number:	83158	HD catalog number
Hipparcos number:	47250	Hipparcos catalog number
V1:	9.40	Magnitude of the primary
V2:	8.85	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2001	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1765

WDS 6th Orbit including measures of A1765

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

Ephemeris of A1765

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.112    146.2
-------------------------
2011.0     0.121     18.6
2012.0     0.128      7.5
2013.0     0.137    357.7
2014.0     0.147    349.2
2015.0     0.155    341.7
2016.0     0.162    334.9
2017.0     0.166    328.5
2018.0     0.164    322.2
2019.0     0.156    315.6
2020.0     0.138    307.7
2021.0     0.110    296.5
2022.0     0.072    274.9
2023.0     0.048    219.4
2024.0     0.075    166.5
2025.0     0.112    146.2
2026.0     0.141    135.5
2027.0     0.159    127.9
2028.0     0.168    121.5
2029.0     0.170    115.6
2030.0     0.167    109.5
2031.0     0.161    103.2
2032.0     0.152     96.2
2033.0     0.143     88.3
2034.0     0.133     79.3
2035.0     0.125     68.9
2036.0     0.118     57.2
2037.0     0.115     44.6
2038.0     0.116     31.7

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.