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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:42:01

Orbital Elements for HDS2399

WDS:	HDS2399	WDS ID/Discoverer
P:	45.379	Orbital period (years)
a:	0.384	Semi-major axis (arcseconds)
i:	29.6	Inclination (degrees)
Ω:	14.1	Longitude of ascending node (degrees)
T:	2018.800	Epoch of periastron passage (year)
e:	0.83	Eccentricity
ω:	100.7	Longitude of periastron (degrees)
Start-Year:	2003.0	Year
End-Year:	2047.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS2399

Position:	165746.09+131729.2	Epoch-2000 right ascension and declination
WDS-ID:	16578+1317	WDS designation
Discoverer Code:	HDS2399	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	83010	Hipparcos catalog number
V1:	10.90	Magnitude of the primary
V2:	13.09	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 HDS2399

WDS 6th Orbit including measures of HDS2399

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

Ephemeris of HDS2399

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.372    261.6
-------------------------
2003.0     0.584    307.0
2004.0     0.573    308.7
2005.0     0.560    310.5
2006.0     0.545    312.4
2007.0     0.529    314.3
2008.0     0.510    316.4
2009.0     0.489    318.7
2010.0     0.465    321.2
2011.0     0.439    324.0
2012.0     0.409    327.1
2013.0     0.376    330.8
2014.0     0.338    335.3
2015.0     0.295    340.9
2016.0     0.245    348.8
2017.0     0.184      1.2
2018.0     0.108     29.2
2019.0     0.064    148.2
2020.0     0.138    212.7
2021.0     0.201    232.8
2022.0     0.253    243.9
2023.0     0.297    251.5
2024.0     0.337    257.1
2025.0     0.372    261.6
2026.0     0.403    265.4
2027.0     0.431    268.7
2028.0     0.457    271.6
2029.0     0.480    274.1
2030.0     0.501    276.5
2031.0     0.520    278.7
2032.0     0.537    280.7
2033.0     0.552    282.6
2034.0     0.566    284.4
2035.0     0.577    286.2
2036.0     0.587    287.8
2037.0     0.596    289.5
2038.0     0.602    291.0
2039.0     0.608    292.6
2040.0     0.612    294.1
2041.0     0.614    295.6
2042.0     0.615    297.1
2043.0     0.614    298.6
2044.0     0.612    300.1
2045.0     0.608    301.7
2046.0     0.603    303.2

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.