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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:59:49

Orbital Elements for HDS566AA,AB

WDS:	HDS566AA,AB	WDS ID/Discoverer
P:	55.000	Orbital period (years)
a:	0.342	Semi-major axis (arcseconds)
i:	114.5	Inclination (degrees)
Ω:	19.2	Longitude of ascending node (degrees)
T:	2035.135	Epoch of periastron passage (year)
e:	0.677	Eccentricity
ω:	231.8	Longitude of periastron (degrees)
Start-Year:	1998.0	Year
End-Year:	2052.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HDS566AA,AB

Position:	042448.05+155229.0	Epoch-2000 right ascension and declination
WDS-ID:	04248+1552	WDS designation
Discoverer Code:	HDS566AA,AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	.	HD catalog number
Hipparcos number:	20605	Hipparcos catalog number
V1:	12.13	Magnitude of the primary
V2:	13.10	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2017	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HDS566AA,AB

WDS 6th Orbit including measures of HDS566AA,AB

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

Ephemeris of HDS566AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.165    290.0
-------------------------
1998.0     0.449      3.4
1999.0     0.449      2.3
2000.0     0.448      1.1
2001.0     0.445    359.9
2002.0     0.442    358.8
2003.0     0.437    357.5
2004.0     0.431    356.3
2005.0     0.424    355.0
2006.0     0.416    353.7
2007.0     0.407    352.3
2008.0     0.397    350.9
2009.0     0.387    349.4
2010.0     0.375    347.7
2011.0     0.363    346.0
2012.0     0.350    344.2
2013.0     0.337    342.2
2014.0     0.323    340.1
2015.0     0.308    337.7
2016.0     0.293    335.1
2017.0     0.278    332.3
2018.0     0.263    329.1
2019.0     0.247    325.5
2020.0     0.231    321.4
2021.0     0.216    316.7
2022.0     0.202    311.4
2023.0     0.188    305.2
2024.0     0.176    298.1
2025.0     0.165    290.0
2026.0     0.157    281.0
2027.0     0.151    271.1
2028.0     0.149    260.7
2029.0     0.149    250.1
2030.0     0.151    239.7
2031.0     0.154    229.7
2032.0     0.154    219.8
2033.0     0.148    209.6
2034.0     0.127    197.4
2035.0     0.084    176.3
2036.0     0.050    110.6
2037.0     0.094     53.7
2038.0     0.152     37.4
2039.0     0.204     29.9
2040.0     0.248     25.3
2041.0     0.284     22.0
2042.0     0.316     19.4
2043.0     0.342     17.3
2044.0     0.365     15.4
2045.0     0.384     13.7
2046.0     0.400     12.2
2047.0     0.413     10.8
2048.0     0.424      9.5
2049.0     0.432      8.2
2050.0     0.439      7.0
2051.0     0.444      5.8

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.