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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:57:46

Orbital Elements for HDS2615AB

WDS:	HDS2615AB	WDS ID/Discoverer
P:	43.480	Orbital period (years)
a:	0.383	Semi-major axis (arcseconds)
i:	100.0	Inclination (degrees)
Ω:	173.5	Longitude of ascending node (degrees)
T:	1985.420	Epoch of periastron passage (year)
e:	0.5	Eccentricity
ω:	80.1	Longitude of periastron (degrees)
Start-Year:	2004.0	Year
End-Year:	2046.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2615AB

Position:	182806.17-264525.8	Epoch-2000 right ascension and declination
WDS-ID:	18281-2645	WDS designation
Discoverer Code:	HDS2615AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	169938	HD catalog number
Hipparcos number:	90510	Hipparcos catalog number
V1:	6.40	Magnitude of the primary
V2:	9.31	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for HDS2615AB

WDS 6th Orbit including measures of HDS2615AB

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

Ephemeris of HDS2615AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.275    174.4
-------------------------
2004.0     0.215    328.1
2005.0     0.190    323.6
2006.0     0.166    317.8
2007.0     0.143    310.1
2008.0     0.122    299.6
2009.0     0.107    285.5
2010.0     0.099    267.9
2011.0     0.100    249.2
2012.0     0.111    232.7
2013.0     0.129    219.9
2014.0     0.150    210.4
2015.0     0.173    203.3
2016.0     0.197    198.0
2017.0     0.220    193.8
2018.0     0.242    190.4
2019.0     0.262    187.5
2020.0     0.279    185.0
2021.0     0.292    182.8
2022.0     0.300    180.7
2023.0     0.301    178.7
2024.0     0.294    176.7
2025.0     0.275    174.4
2026.0     0.241    171.7
2027.0     0.189    167.7
2028.0     0.117    159.6
2029.0     0.041    118.9
2030.0     0.078     18.2
2031.0     0.158      3.6
2032.0     0.225    358.5
2033.0     0.277    355.6
2034.0     0.314    353.5
2035.0     0.340    351.8
2036.0     0.357    350.3
2037.0     0.366    348.9
2038.0     0.368    347.6
2039.0     0.365    346.2
2040.0     0.358    344.8
2041.0     0.346    343.3
2042.0     0.332    341.7
2043.0     0.314    340.0
2044.0     0.295    338.0
2045.0     0.273    335.8

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.