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

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 18:12:49

Orbital Elements for A1851

WDS:	A1851	WDS ID/Discoverer
P:	61.300	Orbital period (years)
a:	0.415	Semi-major axis (arcseconds)
i:	26.0	Inclination (degrees)
Ω:	129.8	Longitude of ascending node (degrees)
T:	1959.300	Epoch of periastron passage (year)
e:	0.252	Eccentricity
ω:	319.5	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 A1851

Position:	124210.75+262139.5	Epoch-2000 right ascension and declination
WDS-ID:	12422+2622	WDS designation
Discoverer Code:	A1851	Discover designation and components
ADS number:	8635	Aitken Double Star catalog
HD number:	110465	HD catalog number
Hipparcos number:	61986	Hipparcos catalog number
V1:	10.09	Magnitude of the primary
V2:	10.08	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for A1851

WDS 6th Orbit including measures of A1851

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

Ephemeris of A1851

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.328    132.1
-------------------------
1995.0     0.504    289.9
1996.0     0.502    293.3
1997.0     0.499    296.8
1998.0     0.495    300.4
1999.0     0.491    304.0
2000.0     0.485    307.7
2001.0     0.477    311.5
2002.0     0.469    315.4
2003.0     0.460    319.5
2004.0     0.449    323.8
2005.0     0.438    328.3
2006.0     0.425    333.0
2007.0     0.412    338.0
2008.0     0.398    343.4
2009.0     0.383    349.1
2010.0     0.368    355.4
2011.0     0.354      2.1
2012.0     0.339      9.4
2013.0     0.326     17.4
2014.0     0.314     26.0
2015.0     0.304     35.2
2016.0     0.297     45.0
2017.0     0.292     55.2
2018.0     0.290     65.6
2019.0     0.291     76.0
2020.0     0.295     86.3
2021.0     0.300     96.2
2022.0     0.306    105.8
2023.0     0.314    115.0
2024.0     0.321    123.7
2025.0     0.328    132.1
2026.0     0.335    140.1
2027.0     0.342    147.8
2028.0     0.348    155.2
2029.0     0.354    162.3
2030.0     0.360    169.2
2031.0     0.366    175.9
2032.0     0.372    182.3
2033.0     0.378    188.6
2034.0     0.385    194.6
2035.0     0.392    200.5
2036.0     0.399    206.1
2037.0     0.406    211.5
2038.0     0.413    216.8
2039.0     0.421    221.8
2040.0     0.428    226.7
2041.0     0.436    231.4
2042.0     0.444    236.0
2043.0     0.451    240.4
2044.0     0.458    244.6
2045.0     0.465    248.7
2046.0     0.472    252.8
2047.0     0.478    256.7
2048.0     0.484    260.5
2049.0     0.489    264.2
2050.0     0.493    267.8
2051.0     0.497    271.4
2052.0     0.500    274.9
2053.0     0.503    278.4
2054.0     0.504    281.9

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.