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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:10:06

Orbital Elements for YR2AA,AB

WDS:	YR2AA,AB	WDS ID/Discoverer
P:	54.080	Orbital period (years)
a:	0.141	Semi-major axis (arcseconds)
i:	113.0	Inclination (degrees)
Ω:	216.7	Longitude of ascending node (degrees)
T:	2016.900	Epoch of periastron passage (year)
e:	0.484	Eccentricity
ω:	259.9	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 YR2AA,AB

Position:	195537.82+522620.5	Epoch-2000 right ascension and declination
WDS-ID:	19556+5226	WDS designation
Discoverer Code:	YR2AA,AB	Discover designation and components
ADS number:	13148	Aitken Double Star catalog
HD number:	189037	HD catalog number
Hipparcos number:	98055	Hipparcos catalog number
V1:	5.6	Magnitude of the primary
V2:	6.1	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2010	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for YR2AA,AB

WDS 6th Orbit including measures of YR2AA,AB

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

Ephemeris of YR2AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.129    212.4
-------------------------
1998.0     0.086     97.2
1999.0     0.089     91.3
2000.0     0.092     85.7
2001.0     0.096     80.5
2002.0     0.099     75.8
2003.0     0.103     71.3
2004.0     0.107     67.2
2005.0     0.110     63.4
2006.0     0.112     59.7
2007.0     0.114     56.2
2008.0     0.115     52.7
2009.0     0.115     49.3
2010.0     0.113     45.8
2011.0     0.109     42.1
2012.0     0.102     38.1
2013.0     0.093     33.3
2014.0     0.080     27.2
2015.0     0.063     18.3
2016.0     0.044      2.1
2017.0     0.030    326.3
2018.0     0.033    275.1
2019.0     0.051    247.7
2020.0     0.070    235.0
2021.0     0.087    227.6
2022.0     0.101    222.5
2023.0     0.113    218.5
2024.0     0.122    215.2
2025.0     0.129    212.4
2026.0     0.134    209.7
2027.0     0.137    207.3
2028.0     0.139    204.9
2029.0     0.140    202.6
2030.0     0.139    200.2
2031.0     0.138    197.9
2032.0     0.136    195.5
2033.0     0.133    193.0
2034.0     0.130    190.4
2035.0     0.127    187.6
2036.0     0.123    184.7
2037.0     0.118    181.6
2038.0     0.114    178.2
2039.0     0.109    174.6
2040.0     0.105    170.6
2041.0     0.100    166.3
2042.0     0.096    161.6
2043.0     0.092    156.4
2044.0     0.088    150.9
2045.0     0.085    144.8
2046.0     0.083    138.4
2047.0     0.081    131.7
2048.0     0.080    124.8
2049.0     0.080    117.8
2050.0     0.081    110.8
2051.0     0.083    104.1

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.