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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:12:40

Orbital Elements for HJ4539AB

WDS:	HJ4539AB	WDS ID/Discoverer
P:	83.570	Orbital period (years)
a:	0.869	Semi-major axis (arcseconds)
i:	113.7	Inclination (degrees)
Ω:	2.6	Longitude of ascending node (degrees)
T:	1931.250	Epoch of periastron passage (year)
e:	0.793	Eccentricity
ω:	187.9	Longitude of periastron (degrees)
Start-Year:	1984.0	Year
End-Year:	2066.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for HJ4539AB

Position:	124131.01-485734.6	Epoch-2000 right ascension and declination
WDS-ID:	12415-4858	WDS designation
Discoverer Code:	HJ4539AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	110304	HD catalog number
Hipparcos number:	61932	Hipparcos catalog number
V1:	2.82	Magnitude of the primary
V2:	2.88	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2013	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for HJ4539AB

WDS 6th Orbit including measures of HJ4539AB

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

Ephemeris of HJ4539AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.764     15.7
-------------------------
1984.0     1.429    355.5
1985.0     1.410    355.1
1986.0     1.388    354.7
1987.0     1.365    354.3
1988.0     1.341    353.9
1989.0     1.315    353.4
1990.0     1.287    353.0
1991.0     1.257    352.5
1992.0     1.226    351.9
1993.0     1.193    351.4
1994.0     1.158    350.8
1995.0     1.121    350.2
1996.0     1.082    349.6
1997.0     1.041    348.8
1998.0     0.998    348.1
1999.0     0.952    347.2
2000.0     0.904    346.3
2001.0     0.854    345.3
2002.0     0.801    344.1
2003.0     0.746    342.8
2004.0     0.687    341.2
2005.0     0.626    339.4
2006.0     0.562    337.1
2007.0     0.494    334.3
2008.0     0.423    330.4
2009.0     0.350    325.1
2010.0     0.275    316.8
2011.0     0.203    302.4
2012.0     0.148    275.1
2013.0     0.139    233.6
2014.0     0.172    199.8
2015.0     0.173    174.8
2016.0     0.122    137.3
2017.0     0.129     78.4
2018.0     0.209     47.9
2019.0     0.302     35.3
2020.0     0.392     28.5
2021.0     0.477     24.3
2022.0     0.556     21.3
2023.0     0.630     19.0
2024.0     0.699     17.2
2025.0     0.764     15.7
2026.0     0.825     14.4
2027.0     0.883     13.3
2028.0     0.937     12.4
2029.0     0.987     11.5
2030.0     1.035     10.7
2031.0     1.080     10.0
2032.0     1.122      9.4
2033.0     1.162      8.8
2034.0     1.199      8.2
2035.0     1.234      7.7
2036.0     1.267      7.1
2037.0     1.297      6.7
2038.0     1.326      6.2
2039.0     1.353      5.8
2040.0     1.377      5.3
2041.0     1.400      4.9
2042.0     1.422      4.5
2043.0     1.441      4.1
2044.0     1.459      3.7
2045.0     1.475      3.4
2046.0     1.489      3.0
2047.0     1.502      2.7
2048.0     1.513      2.3
2049.0     1.522      2.0
2050.0     1.530      1.6
2051.0     1.537      1.3
2052.0     1.542      0.9
2053.0     1.545      0.6
2054.0     1.547      0.3
2055.0     1.548    359.9
2056.0     1.547    359.6
2057.0     1.545    359.3
2058.0     1.541    358.9
2059.0     1.535    358.6
2060.0     1.529    358.3
2061.0     1.520    357.9
2062.0     1.511    357.6
2063.0     1.499    357.2
2064.0     1.487    356.9
2065.0     1.473    356.5

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.