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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 16:19:59

Orbital Elements for YR4

WDS:	YR4	WDS ID/Discoverer
P:	42.300	Orbital period (years)
a:	0.255	Semi-major axis (arcseconds)
i:	162.1	Inclination (degrees)
Ω:	35.2	Longitude of ascending node (degrees)
T:	2026.170	Epoch of periastron passage (year)
e:	0.617	Eccentricity
ω:	16.1	Longitude of periastron (degrees)
Start-Year:	2004.0	Year
End-Year:	2046.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for YR4

Position:	002608.64-112236.8	Epoch-2000 right ascension and declination
WDS-ID:	00261-1123	WDS designation
Discoverer Code:	YR4	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	2237	HD catalog number
Hipparcos number:	2066	Hipparcos catalog number
V1:	8.33	Magnitude of the primary
V2:	11.32	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for YR4

WDS 6th Orbit including measures of YR4

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

Ephemeris of YR4

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.111     66.4
-------------------------
2004.0     0.411    202.3
2005.0     0.411    199.9
2006.0     0.410    197.4
2007.0     0.407    194.9
2008.0     0.403    192.4
2009.0     0.398    189.8
2010.0     0.391    187.2
2011.0     0.383    184.4
2012.0     0.373    181.5
2013.0     0.362    178.5
2014.0     0.350    175.2
2015.0     0.335    171.7
2016.0     0.320    167.8
2017.0     0.302    163.5
2018.0     0.283    158.7
2019.0     0.261    153.1
2020.0     0.238    146.4
2021.0     0.214    138.3
2022.0     0.187    128.0
2023.0     0.160    114.2
2024.0     0.133     94.7
2025.0     0.111     66.4
2026.0     0.098     27.2
2027.0     0.102    344.5
2028.0     0.123    310.8
2029.0     0.151    288.3
2030.0     0.181    273.1
2031.0     0.209    262.2
2032.0     0.236    253.8
2033.0     0.261    247.1
2034.0     0.283    241.5
2035.0     0.303    236.6
2036.0     0.321    232.4
2037.0     0.338    228.6
2038.0     0.352    225.1
2039.0     0.365    221.9
2040.0     0.376    218.9
2041.0     0.385    216.0
2042.0     0.393    213.3
2043.0     0.400    210.6
2044.0     0.405    208.1
2045.0     0.408    205.6

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.