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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:57:56

Orbital Elements for CHR72AA,AB

WDS:	CHR72AA,AB	WDS ID/Discoverer
P:	70.800	Orbital period (years)
a:	0.143	Semi-major axis (arcseconds)
i:	57.7	Inclination (degrees)
Ω:	44.0	Longitude of ascending node (degrees)
T:	2008.300	Epoch of periastron passage (year)
e:	0.784	Eccentricity
ω:	101.2	Longitude of periastron (degrees)
Start-Year:	1990.0	Year
End-Year:	2060.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR72AA,AB

Position:	183005.12+040355.3	Epoch-2000 right ascension and declination
WDS-ID:	18301+0404	WDS designation
Discoverer Code:	CHR72AA,AB	Discover designation and components
ADS number:	11399	Aitken Double Star catalog
HD number:	170580	HD catalog number
Hipparcos number:	90676	Hipparcos catalog number
V1:	6.7	Magnitude of the primary
V2:	9.6	Magnitude of the secondary
Equinox:		Equinox
Date:	2021	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CHR72AA,AB

WDS 6th Orbit including measures of CHR72AA,AB

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

Ephemeris of CHR72AA,AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.113    295.2
-------------------------
1990.0     0.145      1.6
1991.0     0.144      3.2
1992.0     0.142      4.9
1993.0     0.141      6.6
1994.0     0.139      8.4
1995.0     0.136     10.2
1996.0     0.133     12.2
1997.0     0.130     14.1
1998.0     0.126     16.2
1999.0     0.122     18.5
2000.0     0.117     20.9
2001.0     0.111     23.6
2002.0     0.104     26.6
2003.0     0.096     30.0
2004.0     0.086     34.2
2005.0     0.074     39.6
2006.0     0.059     47.5
2007.0     0.039     62.4
2008.0     0.017    118.0
2009.0     0.031    203.2
2010.0     0.049    225.4
2011.0     0.062    236.6
2012.0     0.070    244.4
2013.0     0.077    250.8
2014.0     0.082    256.2
2015.0     0.087    261.0
2016.0     0.090    265.4
2017.0     0.094    269.5
2018.0     0.097    273.3
2019.0     0.099    276.9
2020.0     0.102    280.3
2021.0     0.104    283.5
2022.0     0.107    286.6
2023.0     0.109    289.6
2024.0     0.111    292.4
2025.0     0.113    295.2
2026.0     0.115    297.8
2027.0     0.117    300.4
2028.0     0.119    302.9
2029.0     0.121    305.3
2030.0     0.123    307.6
2031.0     0.124    309.9
2032.0     0.126    312.1
2033.0     0.128    314.2
2034.0     0.129    316.3
2035.0     0.131    318.3
2036.0     0.132    320.3
2037.0     0.134    322.3
2038.0     0.135    324.2
2039.0     0.137    326.0
2040.0     0.138    327.9
2041.0     0.139    329.7
2042.0     0.141    331.4
2043.0     0.142    333.1
2044.0     0.143    334.8
2045.0     0.144    336.5
2046.0     0.145    338.2
2047.0     0.146    339.8
2048.0     0.146    341.4
2049.0     0.147    343.0
2050.0     0.148    344.6
2051.0     0.148    346.2
2052.0     0.149    347.7
2053.0     0.149    349.3
2054.0     0.149    350.9
2055.0     0.149    352.4
2056.0     0.149    354.0
2057.0     0.148    355.5
2058.0     0.148    357.1
2059.0     0.147    358.7

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.