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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:16:48

Orbital Elements for A2657

WDS:	A2657	WDS ID/Discoverer
P:	60.430	Orbital period (years)
a:	0.137	Semi-major axis (arcseconds)
i:	18.9	Inclination (degrees)
Ω:	20.1	Longitude of ascending node (degrees)
T:	1964.860	Epoch of periastron passage (year)
e:	0.466	Eccentricity
ω:	350.4	Longitude of periastron (degrees)
Start-Year:	1995.0	Year
End-Year:	2055.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2657

Position:	054814.65+013635.1	Epoch-2000 right ascension and declination
WDS-ID:	05482+0137	WDS designation
Discoverer Code:	A2657	Discover designation and components
ADS number:	4396	Aitken Double Star catalog
HD number:	38769	HD catalog number
Hipparcos number:	27410	Hipparcos catalog number
V1:	7.93	Magnitude of the primary
V2:	7.91	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1999	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2657

WDS 6th Orbit including measures of A2657

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

Ephemeris of A2657

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.073      5.9
-------------------------
1995.0     0.201    190.8
1996.0     0.201    193.2
1997.0     0.200    195.5
1998.0     0.199    197.8
1999.0     0.198    200.2
2000.0     0.197    202.6
2001.0     0.195    205.0
2002.0     0.193    207.5
2003.0     0.190    210.1
2004.0     0.187    212.7
2005.0     0.184    215.4
2006.0     0.180    218.2
2007.0     0.176    221.2
2008.0     0.172    224.2
2009.0     0.167    227.5
2010.0     0.162    231.0
2011.0     0.156    234.7
2012.0     0.150    238.7
2013.0     0.144    243.0
2014.0     0.137    247.8
2015.0     0.130    253.0
2016.0     0.123    258.9
2017.0     0.115    265.5
2018.0     0.108    273.0
2019.0     0.100    281.7
2020.0     0.093    291.7
2021.0     0.087    303.4
2022.0     0.081    316.8
2023.0     0.077    331.9
2024.0     0.074    348.5
2025.0     0.073      5.9
2026.0     0.074     23.4
2027.0     0.076     40.1
2028.0     0.080     55.6
2029.0     0.084     69.5
2030.0     0.090     81.8
2031.0     0.096     92.6
2032.0     0.103    102.0
2033.0     0.110    110.3
2034.0     0.117    117.5
2035.0     0.124    123.9
2036.0     0.131    129.7
2037.0     0.138    134.9
2038.0     0.144    139.6
2039.0     0.150    144.0
2040.0     0.156    148.0
2041.0     0.161    151.7
2042.0     0.166    155.2
2043.0     0.171    158.5
2044.0     0.175    161.6
2045.0     0.179    164.6
2046.0     0.183    167.4
2047.0     0.186    170.2
2048.0     0.189    172.8
2049.0     0.192    175.4
2050.0     0.194    177.9
2051.0     0.196    180.4
2052.0     0.198    182.8
2053.0     0.199    185.1
2054.0     0.200    187.5

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.