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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 17:32:37

Orbital Elements for A2855

WDS:	A2855	WDS ID/Discoverer
P:	64.440	Orbital period (years)
a:	0.349	Semi-major axis (arcseconds)
i:	148.3	Inclination (degrees)
Ω:	56.3	Longitude of ascending node (degrees)
T:	1958.360	Epoch of periastron passage (year)
e:	0.178	Eccentricity
ω:	329.2	Longitude of periastron (degrees)
Start-Year:	1993.0	Year
End-Year:	2057.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2855

Position:	071647.50+005846.3	Epoch-2000 right ascension and declination
WDS-ID:	07168+0059	WDS designation
Discoverer Code:	A2855	Discover designation and components
ADS number:	5949	Aitken Double Star catalog
HD number:	56361	HD catalog number
Hipparcos number:	35221	Hipparcos catalog number
V1:	9.53	Magnitude of the primary
V2:	9.25	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2006	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A2855

WDS 6th Orbit including measures of A2855

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

Ephemeris of A2855

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.287     67.4
-------------------------
1993.0     0.402    254.6
1994.0     0.404    251.1
1995.0     0.404    247.6
1996.0     0.404    244.1
1997.0     0.402    240.6
1998.0     0.400    237.0
1999.0     0.396    233.4
2000.0     0.392    229.7
2001.0     0.386    226.0
2002.0     0.380    222.1
2003.0     0.373    218.1
2004.0     0.365    213.9
2005.0     0.356    209.5
2006.0     0.346    204.9
2007.0     0.336    200.0
2008.0     0.326    194.8
2009.0     0.315    189.2
2010.0     0.305    183.3
2011.0     0.295    177.0
2012.0     0.285    170.2
2013.0     0.277    163.0
2014.0     0.270    155.3
2015.0     0.264    147.3
2016.0     0.260    139.0
2017.0     0.258    130.6
2018.0     0.258    122.0
2019.0     0.260    113.5
2020.0     0.263    105.2
2021.0     0.267     97.1
2022.0     0.272     89.3
2023.0     0.277     81.7
2024.0     0.282     74.4
2025.0     0.287     67.4
2026.0     0.291     60.6
2027.0     0.294     53.9
2028.0     0.297     47.4
2029.0     0.298     41.0
2030.0     0.300     34.6
2031.0     0.300     28.3
2032.0     0.300     22.0
2033.0     0.301     15.6
2034.0     0.301      9.3
2035.0     0.301      3.1
2036.0     0.302    356.8
2037.0     0.304    350.6
2038.0     0.306    344.5
2039.0     0.308    338.4
2040.0     0.312    332.5
2041.0     0.316    326.7
2042.0     0.321    321.1
2043.0     0.326    315.6
2044.0     0.332    310.4
2045.0     0.338    305.3
2046.0     0.345    300.4
2047.0     0.351    295.7
2048.0     0.358    291.2
2049.0     0.364    286.8
2050.0     0.371    282.6
2051.0     0.377    278.5
2052.0     0.382    274.5
2053.0     0.387    270.7
2054.0     0.392    266.9
2055.0     0.396    263.3
2056.0     0.399    259.7

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.