Double Star Calculator - Orbit

Orbital Elements for A2171

WDS:	A2171	WDS ID/Discoverer
P:	131.300	Orbital period (years)
a:	0.295	Semi-major axis (arcseconds)
i:	104.4	Inclination (degrees)
Ω:	111.5	Longitude of ascending node (degrees)
T:	2021.400	Epoch of periastron passage (year)
e:	0.065	Eccentricity
ω:	97.7	Longitude of periastron (degrees)
Start-Year:	1959.35	Year
End-Year:	2090.65	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A2171
Position:	145523.54+000950.6	Epoch-2000 right ascension and declination
WDS-ID:	14554+0010	WDS designation
Discoverer Code:	A2171	Discover designation and components
ADS number:	9436	Aitken Double Star catalog
HD number:	131749	HD catalog number
Hipparcos number:	.	Hipparcos catalog number
V1:	9.6	Magnitude of the primary
V2:	9.7	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2022	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	Tok2022g	Reference

Double Star Orbit for A2171

WDS 6th Orbit including measures of A2171

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

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of A2171

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.127   321.11
--------------------------
1959.35    0.116   151.72
1960.35    0.125   147.64
1961.35    0.135   144.13
1962.35    0.145   141.09
1963.35    0.154   138.44
1964.35    0.164   136.10
1965.35    0.174   134.03
1966.35    0.184   132.17
1967.35    0.193   130.50
1968.35    0.202   128.98
1969.35    0.211   127.60
1970.35    0.220   126.32
1971.35    0.228   125.14
1972.35    0.236   124.04
1973.35    0.244   123.01
1974.35    0.251   122.04
1975.35    0.257   121.12
1976.35    0.264   120.25
1977.35    0.269   119.42
1978.35    0.275   118.62
1979.35    0.279   117.84
1980.35    0.284   117.10
1981.35    0.287   116.37
1982.35    0.290   115.66
1983.35    0.293   114.96
1984.35    0.295   114.28
1985.35    0.296   113.60
1986.35    0.297   112.93
1987.35    0.297   112.26
1988.35    0.296   111.58
1989.35    0.295   110.91
1990.35    0.294   110.22
1991.35    0.291   109.53
1992.35    0.288   108.83
1993.35    0.284   108.10
1994.35    0.280   107.36
1995.35    0.275   106.59
1996.35    0.270   105.79
1997.35    0.264   104.96
1998.35    0.257   104.09
1999.35    0.250   103.16
2000.35    0.242   102.18
2001.35    0.233   101.13
2002.35    0.224   100.00
2003.35    0.215    98.77
2004.35    0.205    97.43
2005.35    0.195    95.95
2006.35    0.184    94.31
2007.35    0.173    92.45
2008.35    0.162    90.35
2009.35    0.151    87.94
2010.35    0.140    85.12
2011.35    0.128    81.81
2012.35    0.117    77.85
2013.35    0.106    73.06
2014.35    0.096    67.20
2015.35    0.086    60.01
2016.35    0.078    51.22
2017.35    0.072    40.75
2018.35    0.069    28.86
2019.35    0.069    16.34
2020.35    0.072     4.26
2021.35    0.077   353.47
2022.35    0.085   344.34
2023.35    0.094   336.85
2024.35    0.104   330.75
2025.35    0.115   325.77
2026.35    0.126   321.66
2027.35    0.137   318.23
2028.35    0.149   315.32
2029.35    0.160   312.83
2030.35    0.171   310.67
2031.35    0.182   308.77
2032.35    0.193   307.08
2033.35    0.203   305.57
2034.35    0.213   304.19
2035.35    0.222   302.94
2036.35    0.231   301.78
2037.35    0.239   300.71
2038.35    0.247   299.71
2039.35    0.254   298.76
2040.35    0.261   297.87
2041.35    0.267   297.02
2042.35    0.272   296.20
2043.35    0.277   295.42
2044.35    0.281   294.66
2045.35    0.284   293.92
2046.35    0.287   293.19
2047.35    0.289   292.48
2048.35    0.291   291.78
2049.35    0.292   291.08
2050.35    0.292   290.38
2051.35    0.291   289.69
2052.35    0.290   288.99
2053.35    0.289   288.28
2054.35    0.286   287.56
2055.35    0.283   286.83
2056.35    0.280   286.09
2057.35    0.276   285.32
2058.35    0.271   284.53
2059.35    0.266   283.71
2060.35    0.260   282.85
2061.35    0.254   281.96
2062.35    0.247   281.02
2063.35    0.240   280.02
2064.35    0.233   278.96
2065.35    0.225   277.83
2066.35    0.217   276.62
2067.35    0.208   275.30
2068.35    0.199   273.87
2069.35    0.190   272.31
2070.35    0.180   270.58
2071.35    0.171   268.65
2072.35    0.161   266.50
2073.35    0.151   264.07
2074.35    0.141   261.30
2075.35    0.132   258.12
2076.35    0.122   254.45
2077.35    0.113   250.17
2078.35    0.105   245.16
2079.35    0.097   239.30
2080.35    0.090   232.48
2081.35    0.084   224.64
2082.35    0.080   215.88
2083.35    0.078   206.44
2084.35    0.078   196.75
2085.35    0.080   187.31
2086.35    0.084   178.55
2087.35    0.090   170.73
2088.35    0.097   163.91
2089.35    0.105   158.07
2090.35    0.113   153.07

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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.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 17:10:19