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

Double Star Calculator - Orbit

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

Orbital Elements for YR18

WDS:	YR18	WDS ID/Discoverer
P:	82.100	Orbital period (years)
a:	0.291	Semi-major axis (arcseconds)
i:	120.4	Inclination (degrees)
Ω:	91.7	Longitude of ascending node (degrees)
T:	2023.510	Epoch of periastron passage (year)
e:	0.382	Eccentricity
ω:	317.2	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 YR18

Position:	233944.85-004426.1	Epoch-2000 right ascension and declination
WDS-ID:	23397-0044	WDS designation
Discoverer Code:	YR18	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	222342	HD catalog number
Hipparcos number:	116756	Hipparcos catalog number
V1:	8.92	Magnitude of the primary
V2:	11.68	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YR18

WDS 6th Orbit including measures of YR18

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

Ephemeris of YR18

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.167    106.2
-------------------------
1984.0     0.336    294.4
1985.0     0.342    292.9
1986.0     0.347    291.4
1987.0     0.352    290.0
1988.0     0.356    288.6
1989.0     0.359    287.2
1990.0     0.362    285.9
1991.0     0.364    284.6
1992.0     0.366    283.3
1993.0     0.367    282.0
1994.0     0.367    280.7
1995.0     0.366    279.4
1996.0     0.364    278.1
1997.0     0.362    276.8
1998.0     0.359    275.4
1999.0     0.354    274.1
2000.0     0.349    272.7
2001.0     0.343    271.2
2002.0     0.336    269.7
2003.0     0.328    268.1
2004.0     0.319    266.5
2005.0     0.309    264.7
2006.0     0.297    262.8
2007.0     0.285    260.8
2008.0     0.271    258.5
2009.0     0.256    256.0
2010.0     0.240    253.2
2011.0     0.224    250.0
2012.0     0.206    246.2
2013.0     0.187    241.7
2014.0     0.168    236.2
2015.0     0.149    229.3
2016.0     0.132    220.4
2017.0     0.116    209.0
2018.0     0.105    194.6
2019.0     0.099    177.6
2020.0     0.101    160.2
2021.0     0.110    144.4
2022.0     0.123    131.5
2023.0     0.138    121.2
2024.0     0.153    113.0
2025.0     0.167    106.2
2026.0     0.179    100.4
2027.0     0.189     95.3
2028.0     0.196     90.6
2029.0     0.200     86.2
2030.0     0.202     81.9
2031.0     0.202     77.6
2032.0     0.201     73.4
2033.0     0.198     69.0
2034.0     0.194     64.4
2035.0     0.189     59.7
2036.0     0.184     54.7
2037.0     0.180     49.5
2038.0     0.175     44.0
2039.0     0.171     38.2
2040.0     0.168     32.2
2041.0     0.166     25.9
2042.0     0.165     19.6
2043.0     0.166     13.3
2044.0     0.167      7.0
2045.0     0.170      0.9
2046.0     0.174    355.0
2047.0     0.180    349.5
2048.0     0.186    344.3
2049.0     0.193    339.5
2050.0     0.201    335.0
2051.0     0.209    330.9
2052.0     0.218    327.0
2053.0     0.227    323.5
2054.0     0.236    320.3
2055.0     0.245    317.3
2056.0     0.255    314.5
2057.0     0.264    311.9
2058.0     0.273    309.5
2059.0     0.282    307.3
2060.0     0.291    305.1
2061.0     0.299    303.1
2062.0     0.307    301.2
2063.0     0.315    299.4
2064.0     0.322    297.7
2065.0     0.329    296.1

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.