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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:58:30

Orbital Elements for CHR74

WDS:	CHR74	WDS ID/Discoverer
P:	68.400	Orbital period (years)
a:	0.1684	Semi-major axis (arcseconds)
i:	116.6	Inclination (degrees)
Ω:	40.2	Longitude of ascending node (degrees)
T:	2042.100	Epoch of periastron passage (year)
e:	0.0	Eccentricity
ω:	139.0	Longitude of periastron (degrees)
Start-Year:	1991.0	Year
End-Year:	2059.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR74

Position:	183512.59+181212.2	Epoch-2000 right ascension and declination
WDS-ID:	18352+1812	WDS designation
Discoverer Code:	CHR74	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	171623	HD catalog number
Hipparcos number:	91118	Hipparcos catalog number
V1:	5.78	Magnitude of the primary
V2:	.	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2014	Date of last observation
Orbit grade:	4	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:		Flags

Double Star Orbit for CHR74

WDS 6th Orbit including measures of CHR74

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

Ephemeris of CHR74

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.124     12.9
-------------------------
1991.0     0.123    192.1
1992.0     0.114    187.3
1993.0     0.106    181.8
1994.0     0.097    175.2
1995.0     0.090    167.6
1996.0     0.083    158.6
1997.0     0.079    148.4
1998.0     0.076    137.1
1999.0     0.076    125.4
2000.0     0.078    114.0
2001.0     0.082    103.5
2002.0     0.089     94.3
2003.0     0.096     86.4
2004.0     0.104     79.7
2005.0     0.113     74.0
2006.0     0.121     69.1
2007.0     0.129     64.9
2008.0     0.137     61.1
2009.0     0.144     57.7
2010.0     0.151     54.7
2011.0     0.156     51.8
2012.0     0.161     49.2
2013.0     0.164     46.6
2014.0     0.167     44.2
2015.0     0.168     41.8
2016.0     0.168     39.5
2017.0     0.167     37.1
2018.0     0.165     34.7
2019.0     0.162     32.2
2020.0     0.158     29.6
2021.0     0.153     26.8
2022.0     0.147     23.9
2023.0     0.140     20.6
2024.0     0.132     17.0
2025.0     0.124     12.9
2026.0     0.116      8.3
2027.0     0.107      2.9
2028.0     0.099    356.6
2029.0     0.091    349.2
2030.0     0.085    340.5
2031.0     0.079    330.5
2032.0     0.076    319.4
2033.0     0.075    307.7
2034.0     0.077    296.2
2035.0     0.081    285.5
2036.0     0.087    276.1
2037.0     0.094    267.9
2038.0     0.102    261.0
2039.0     0.111    255.1
2040.0     0.119    250.1
2041.0     0.128    245.7
2042.0     0.136    241.8
2043.0     0.143    238.4
2044.0     0.149    235.3
2045.0     0.155    232.4
2046.0     0.160    229.7
2047.0     0.164    227.1
2048.0     0.166    224.7
2049.0     0.168    222.3
2050.0     0.168    219.9
2051.0     0.168    217.6
2052.0     0.166    215.2
2053.0     0.163    212.7
2054.0     0.159    210.1
2055.0     0.154    207.4
2056.0     0.148    204.5
2057.0     0.141    201.3
2058.0     0.134    197.8

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.