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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:44:35

Orbital Elements for CHR257

WDS:	CHR257	WDS ID/Discoverer
P:	80.900	Orbital period (years)
a:	0.201	Semi-major axis (arcseconds)
i:	79.2	Inclination (degrees)
Ω:	106.2	Longitude of ascending node (degrees)
T:	2030.060	Epoch of periastron passage (year)
e:	0.55	Eccentricity
ω:	170.7	Longitude of periastron (degrees)
Start-Year:	1985.0	Year
End-Year:	2065.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for CHR257

Position:	090744.82+104005.6	Epoch-2000 right ascension and declination
WDS-ID:	09077+1040	WDS designation
Discoverer Code:	CHR257	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	78316	HD catalog number
Hipparcos number:	44798	Hipparcos catalog number
V1:	5.29	Magnitude of the primary
V2:	8.75	Magnitude of the secondary
Equinox:		Equinox
Date:	2019	Date of last observation
Orbit grade:	3	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for CHR257

WDS 6th Orbit including measures of CHR257

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

Ephemeris of CHR257

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.026    225.7
-------------------------
1985.0     0.296    103.0
1986.0     0.300    103.3
1987.0     0.303    103.7
1988.0     0.305    104.0
1989.0     0.307    104.3
1990.0     0.308    104.6
1991.0     0.309    104.9
1992.0     0.309    105.1
1993.0     0.309    105.4
1994.0     0.309    105.7
1995.0     0.307    106.0
1996.0     0.306    106.3
1997.0     0.304    106.6
1998.0     0.301    106.9
1999.0     0.298    107.3
2000.0     0.294    107.6
2001.0     0.290    107.9
2002.0     0.285    108.2
2003.0     0.280    108.6
2004.0     0.274    109.0
2005.0     0.267    109.4
2006.0     0.260    109.8
2007.0     0.252    110.2
2008.0     0.244    110.6
2009.0     0.235    111.1
2010.0     0.225    111.7
2011.0     0.215    112.2
2012.0     0.204    112.9
2013.0     0.192    113.6
2014.0     0.180    114.4
2015.0     0.166    115.4
2016.0     0.152    116.5
2017.0     0.138    117.8
2018.0     0.122    119.5
2019.0     0.106    121.6
2020.0     0.089    124.6
2021.0     0.072    129.0
2022.0     0.055    136.1
2023.0     0.038    149.7
2024.0     0.026    179.5
2025.0     0.026    225.7
2026.0     0.039    254.6
2027.0     0.054    268.0
2028.0     0.069    275.5
2029.0     0.082    280.4
2030.0     0.089    284.2
2031.0     0.091    287.7
2032.0     0.088    291.2
2033.0     0.080    295.1
2034.0     0.069    300.2
2035.0     0.057    307.3
2036.0     0.044    318.7
2037.0     0.033    338.2
2038.0     0.029      9.1
2039.0     0.033     40.2
2040.0     0.044     60.0
2041.0     0.057     71.2
2042.0     0.072     78.1
2043.0     0.086     82.7
2044.0     0.100     86.0
2045.0     0.114     88.4
2046.0     0.128     90.3
2047.0     0.141     91.9
2048.0     0.154     93.2
2049.0     0.166     94.3
2050.0     0.178     95.2
2051.0     0.189     96.1
2052.0     0.200     96.8
2053.0     0.210     97.5
2054.0     0.219     98.1
2055.0     0.229     98.7
2056.0     0.237     99.2
2057.0     0.245     99.7
2058.0     0.253    100.1
2059.0     0.260    100.5
2060.0     0.267    101.0
2061.0     0.273    101.3
2062.0     0.279    101.7
2063.0     0.284    102.1
2064.0     0.289    102.4

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.