Double Star Calculator - Orbit

Orbital Elements for A2167
WDS: A2167 WDS ID/Discoverer
P: 109.400 Orbital period (years)
a: 0.228 Semi-major axis (arcseconds)
i: 119.5 Inclination (degrees)
Ω: 246.9 Longitude of ascending node (degrees)
T: 1924.800 Epoch of periastron passage (year)
e: 0.612 Eccentricity
ω: 270.3 Longitude of periastron (degrees)
Start-Year: 1970.3 Year
End-Year: 2079.7 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A2167
Position: 135820.02+021314.5 Epoch-2000 right ascension and declination
WDS-ID: 13583+0213 WDS designation
Discoverer Code: A2167 Discover designation and components
ADS number: 9073 Aitken Double Star catalog
HD number: 121908 HD catalog number
Hipparcos number: 68250 Hipparcos catalog number
V1: 9.27 Magnitude of the primary
V2: 9.64 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2009 Date of last observation
Orbit grade: 3 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Hrt2010a Reference

Double Star Orbit for A2167



WDS 6th Orbit including measures of A2167

-- 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 A2167
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.145    67.54
--------------------------
1970.30    0.184   174.81
1971.30    0.183   172.83
1972.30    0.183   170.85
1973.30    0.182   168.85
1974.30    0.182   166.84
1975.30    0.182   164.82
1976.30    0.181   162.79
1977.30    0.181   160.76
1978.30    0.181   158.73
1979.30    0.181   156.70
1980.30    0.181   154.66
1981.30    0.181   152.63
1982.30    0.181   150.61
1983.30    0.182   148.59
1984.30    0.182   146.58
1985.30    0.183   144.58
1986.30    0.183   142.59
1987.30    0.184   140.61
1988.30    0.185   138.65
1989.30    0.185   136.70
1990.30    0.186   134.77
1991.30    0.187   132.85
1992.30    0.188   130.96
1993.30    0.189   129.08
1994.30    0.190   127.22
1995.30    0.191   125.39
1996.30    0.192   123.57
1997.30    0.193   121.76
1998.30    0.194   119.98
1999.30    0.195   118.22
2000.30    0.196   116.47
2001.30    0.197   114.74
2002.30    0.198   113.03
2003.30    0.198   111.33
2004.30    0.199   109.65
2005.30    0.200   107.97
2006.30    0.200   106.31
2007.30    0.201   104.66
2008.30    0.201   103.01
2009.30    0.201   101.36
2010.30    0.201    99.72
2011.30    0.201    98.07
2012.30    0.201    96.42
2013.30    0.200    94.76
2014.30    0.199    93.09
2015.30    0.198    91.39
2016.30    0.196    89.67
2017.30    0.194    87.92
2018.30    0.191    86.13
2019.30    0.189    84.28
2020.30    0.185    82.37
2021.30    0.181    80.38
2022.30    0.176    78.29
2023.30    0.170    76.07
2024.30    0.164    73.68
2025.30    0.156    71.07
2026.30    0.147    68.16
2027.30    0.137    64.85
2028.30    0.125    60.96
2029.30    0.111    56.18
2030.30    0.096    49.97
2031.30    0.080    41.28
2032.30    0.063    27.88
2033.30    0.049     5.65
2034.30    0.044   332.79
2035.30    0.051   301.85
2036.30    0.066   282.09
2037.30    0.083   270.06
2038.30    0.100   262.07
2039.30    0.114   256.25
2040.30    0.128   251.70
2041.30    0.139   247.95
2042.30    0.149   244.73
2043.30    0.157   241.89
2044.30    0.165   239.32
2045.30    0.171   236.96
2046.30    0.176   234.75
2047.30    0.181   232.66
2048.30    0.185   230.67
2049.30    0.188   228.76
2050.30    0.191   226.91
2051.30    0.193   225.11
2052.30    0.195   223.34
2053.30    0.197   221.61
2054.30    0.198   219.90
2055.30    0.199   218.20
2056.30    0.199   216.52
2057.30    0.200   214.85
2058.30    0.200   213.18
2059.30    0.200   211.51
2060.30    0.200   209.84
2061.30    0.199   208.16
2062.30    0.199   206.48
2063.30    0.198   204.79
2064.30    0.197   203.08
2065.30    0.197   201.37
2066.30    0.196   199.64
2067.30    0.195   197.90
2068.30    0.194   196.14
2069.30    0.193   194.36
2070.30    0.192   192.56
2071.30    0.191   190.75
2072.30    0.190   188.92
2073.30    0.189   187.07
2074.30    0.188   185.20
2075.30    0.187   183.32
2076.30    0.187   181.41
2077.30    0.186   179.49
2078.30    0.185   177.55
2079.30    0.184   175.59






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This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.


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 17:00:39



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