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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:43:15

Orbital Elements for NHR9AB

WDS:	NHR9AB	WDS ID/Discoverer
P:	67.500	Orbital period (years)
a:	1.467	Semi-major axis (arcseconds)
i:	119.3	Inclination (degrees)
Ω:	18.04	Longitude of ascending node (degrees)
T:	1991.605	Epoch of periastron passage (year)
e:	0.4112	Eccentricity
ω:	161.01	Longitude of periastron (degrees)
Start-Year:	1992.0	Year
End-Year:	2058.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for NHR9AB

Position:	233920.98+773755.1	Epoch-2000 right ascension and declination
WDS-ID:	23393+7738	WDS designation
Discoverer Code:	NHR9AB	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	222404	HD catalog number
Hipparcos number:	116727	Hipparcos catalog number
V1:	1.04k	Magnitude of the primary
V2:	7.3 k	Magnitude of the secondary
Equinox:		Equinox
Date:	2006	Date of last observation
Orbit grade:	5	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for NHR9AB

WDS 6th Orbit including measures of NHR9AB

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

Ephemeris of NHR9AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     1.977     28.1
-------------------------
1992.0     0.847    204.7
1993.0     0.878    197.9
1994.0     0.886    191.3
1995.0     0.873    184.7
1996.0     0.843    177.8
1997.0     0.804    170.2
1998.0     0.760    161.9
1999.0     0.719    152.5
2000.0     0.687    142.1
2001.0     0.669    130.9
2002.0     0.669    119.4
2003.0     0.688    108.2
2004.0     0.725     97.9
2005.0     0.776     88.8
2006.0     0.838     80.9
2007.0     0.908     74.2
2008.0     0.983     68.4
2009.0     1.060     63.5
2010.0     1.139     59.3
2011.0     1.217     55.6
2012.0     1.294     52.3
2013.0     1.369     49.5
2014.0     1.441     46.9
2015.0     1.510     44.5
2016.0     1.576     42.4
2017.0     1.638     40.4
2018.0     1.696     38.5
2019.0     1.750     36.8
2020.0     1.799     35.2
2021.0     1.844     33.6
2022.0     1.885     32.2
2023.0     1.921     30.8
2024.0     1.951     29.4
2025.0     1.977     28.1
2026.0     1.998     26.8
2027.0     2.014     25.5
2028.0     2.024     24.2
2029.0     2.029     23.0
2030.0     2.028     21.7
2031.0     2.022     20.5
2032.0     2.011     19.2
2033.0     1.993     18.0
2034.0     1.970     16.7
2035.0     1.941     15.3
2036.0     1.905     13.9
2037.0     1.864     12.5
2038.0     1.816     11.0
2039.0     1.761      9.4
2040.0     1.701      7.7
2041.0     1.633      5.8
2042.0     1.559      3.8
2043.0     1.479      1.6
2044.0     1.392    359.1
2045.0     1.299    356.3
2046.0     1.200    353.0
2047.0     1.096    349.1
2048.0     0.989    344.4
2049.0     0.879    338.5
2050.0     0.772    331.0
2051.0     0.671    321.0
2052.0     0.587    308.0
2053.0     0.532    291.4
2054.0     0.518    272.6
2055.0     0.547    254.2
2056.0     0.608    238.7
2057.0     0.684    226.4

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.