Double Star Calculator - Orbit

Orbital Elements for SMN9AB
WDS: SMN9AB WDS ID/Discoverer
P: 271.000 Orbital period (years)
a: 0.272 Semi-major axis (arcseconds)
i: 19.7 Inclination (degrees)
Ω: 18.0 Longitude of ascending node (degrees)
T: 2035.730 Epoch of periastron passage (year)
e: 0.168 Eccentricity
ω: 138.0 Longitude of periastron (degrees)
Start-Year: 1889.5 Year
End-Year: 2160.5 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for SMN9AB
Position: 042202.14+265731.2 Epoch-2000 right ascension and declination
WDS-ID: 04220+2658 WDS designation
Discoverer Code: SMN9AB Discover designation and components
ADS number: . Aitken Double Star catalog
HD number: . HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 14.1 Magnitude of the primary
V2: 16.8 Magnitude of the secondary
Equinox: Equinox
Date: 2001 Date of last observation
Orbit grade: 5 Orbit grade, ranging from :
1 = Definitive
2 = Good
3 = Reliable
4 = Preliminary
5 = Indeterminate
Flags: n Flags
Ephemerides: Ephemerides
Code: Tam2002 Reference

Double Star Orbit for SMN9AB



WDS 6th Orbit including measures of SMN9AB

-- 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 SMN9AB
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.218   140.15
--------------------------
1889.50    0.305   327.36
1890.50    0.306   328.34
1891.50    0.306   329.31
1892.50    0.307   330.29
1893.50    0.307   331.25
1894.50    0.307   332.22
1895.50    0.308   333.18
1896.50    0.308   334.15
1897.50    0.309   335.11
1898.50    0.309   336.06
1899.50    0.309   337.02
1900.50    0.310   337.97
1901.50    0.310   338.92
1902.50    0.310   339.87
1903.50    0.310   340.82
1904.50    0.311   341.76
1905.50    0.311   342.71
1906.50    0.311   343.65
1907.50    0.311   344.59
1908.50    0.311   345.53
1909.50    0.312   346.47
1910.50    0.312   347.41
1911.50    0.312   348.35
1912.50    0.312   349.29
1913.50    0.312   350.23
1914.50    0.312   351.17
1915.50    0.312   352.11
1916.50    0.312   353.04
1917.50    0.312   353.98
1918.50    0.312   354.92
1919.50    0.312   355.86
1920.50    0.311   356.80
1921.50    0.311   357.74
1922.50    0.311   358.68
1923.50    0.311   359.63
1924.50    0.311     0.57
1925.50    0.310     1.52
1926.50    0.310     2.46
1927.50    0.310     3.41
1928.50    0.309     4.37
1929.50    0.309     5.32
1930.50    0.309     6.27
1931.50    0.308     7.23
1932.50    0.308     8.19
1933.50    0.307     9.16
1934.50    0.307    10.12
1935.50    0.306    11.09
1936.50    0.306    12.07
1937.50    0.305    13.04
1938.50    0.305    14.02
1939.50    0.304    15.01
1940.50    0.303    16.00
1941.50    0.303    16.99
1942.50    0.302    17.99
1943.50    0.301    18.99
1944.50    0.301    20.00
1945.50    0.300    21.01
1946.50    0.299    22.03
1947.50    0.298    23.05
1948.50    0.297    24.08
1949.50    0.296    25.12
1950.50    0.295    26.16
1951.50    0.295    27.21
1952.50    0.294    28.26
1953.50    0.293    29.32
1954.50    0.292    30.39
1955.50    0.291    31.47
1956.50    0.289    32.55
1957.50    0.288    33.65
1958.50    0.287    34.75
1959.50    0.286    35.86
1960.50    0.285    36.98
1961.50    0.284    38.10
1962.50    0.283    39.24
1963.50    0.281    40.39
1964.50    0.280    41.54
1965.50    0.279    42.71
1966.50    0.278    43.89
1967.50    0.276    45.08
1968.50    0.275    46.28
1969.50    0.274    47.49
1970.50    0.272    48.71
1971.50    0.271    49.95
1972.50    0.270    51.19
1973.50    0.268    52.45
1974.50    0.267    53.73
1975.50    0.266    55.01
1976.50    0.264    56.31
1977.50    0.263    57.63
1978.50    0.261    58.95
1979.50    0.260    60.30
1980.50    0.259    61.65
1981.50    0.257    63.02
1982.50    0.256    64.41
1983.50    0.254    65.81
1984.50    0.253    67.23
1985.50    0.252    68.67
1986.50    0.250    70.12
1987.50    0.249    71.58
1988.50    0.247    73.06
1989.50    0.246    74.56
1990.50    0.245    76.08
1991.50    0.243    77.61
1992.50    0.242    79.16
1993.50    0.241    80.73
1994.50    0.239    82.31
1995.50    0.238    83.91
1996.50    0.237    85.53
1997.50    0.236    87.16
1998.50    0.234    88.81
1999.50    0.233    90.48
2000.50    0.232    92.16
2001.50    0.231    93.87
2002.50    0.230    95.58
2003.50    0.229    97.31
2004.50    0.228    99.06
2005.50    0.227   100.82
2006.50    0.226   102.60
2007.50    0.225   104.39
2008.50    0.224   106.19
2009.50    0.224   108.01
2010.50    0.223   109.84
2011.50    0.222   111.68
2012.50    0.222   113.53
2013.50    0.221   115.39
2014.50    0.221   117.26
2015.50    0.220   119.14
2016.50    0.220   121.03
2017.50    0.219   122.92
2018.50    0.219   124.82
2019.50    0.219   126.73
2020.50    0.218   128.64
2021.50    0.218   130.56
2022.50    0.218   132.47
2023.50    0.218   134.39
2024.50    0.218   136.31
2025.50    0.218   138.23
2026.50    0.218   140.15
2027.50    0.218   142.07
2028.50    0.218   143.99
2029.50    0.218   145.90
2030.50    0.219   147.81
2031.50    0.219   149.71
2032.50    0.219   151.62
2033.50    0.220   153.51
2034.50    0.220   155.40
2035.50    0.220   157.28
2036.50    0.221   159.15
2037.50    0.221   161.02
2038.50    0.222   162.88
2039.50    0.222   164.73
2040.50    0.223   166.57
2041.50    0.223   168.40
2042.50    0.224   170.23
2043.50    0.225   172.04
2044.50    0.225   173.84
2045.50    0.226   175.63
2046.50    0.227   177.42
2047.50    0.227   179.19
2048.50    0.228   180.95
2049.50    0.229   182.70
2050.50    0.229   184.44
2051.50    0.230   186.17
2052.50    0.231   187.89
2053.50    0.231   189.60
2054.50    0.232   191.30
2055.50    0.233   192.99
2056.50    0.234   194.66
2057.50    0.234   196.33
2058.50    0.235   197.99
2059.50    0.236   199.63
2060.50    0.236   201.27
2061.50    0.237   202.90
2062.50    0.238   204.52
2063.50    0.239   206.12
2064.50    0.239   207.72
2065.50    0.240   209.31
2066.50    0.241   210.89
2067.50    0.241   212.46
2068.50    0.242   214.02
2069.50    0.243   215.57
2070.50    0.243   217.12
2071.50    0.244   218.65
2072.50    0.245   220.18
2073.50    0.246   221.69
2074.50    0.246   223.20
2075.50    0.247   224.70
2076.50    0.248   226.20
2077.50    0.248   227.68
2078.50    0.249   229.16
2079.50    0.250   230.63
2080.50    0.250   232.09
2081.50    0.251   233.54
2082.50    0.252   234.99
2083.50    0.252   236.42
2084.50    0.253   237.85
2085.50    0.254   239.28
2086.50    0.254   240.69
2087.50    0.255   242.10
2088.50    0.256   243.50
2089.50    0.256   244.89
2090.50    0.257   246.28
2091.50    0.258   247.66
2092.50    0.258   249.03
2093.50    0.259   250.40
2094.50    0.260   251.75
2095.50    0.260   253.10
2096.50    0.261   254.45
2097.50    0.262   255.78
2098.50    0.262   257.11
2099.50    0.263   258.44
2100.50    0.264   259.75
2101.50    0.264   261.06
2102.50    0.265   262.36
2103.50    0.266   263.66
2104.50    0.266   264.94
2105.50    0.267   266.22
2106.50    0.268   267.50
2107.50    0.269   268.77
2108.50    0.269   270.03
2109.50    0.270   271.28
2110.50    0.271   272.53
2111.50    0.272   273.77
2112.50    0.272   275.00
2113.50    0.273   276.23
2114.50    0.274   277.45
2115.50    0.274   278.66
2116.50    0.275   279.87
2117.50    0.276   281.07
2118.50    0.277   282.27
2119.50    0.277   283.46
2120.50    0.278   284.64
2121.50    0.279   285.81
2122.50    0.280   286.98
2123.50    0.280   288.14
2124.50    0.281   289.30
2125.50    0.282   290.45
2126.50    0.283   291.60
2127.50    0.283   292.73
2128.50    0.284   293.87
2129.50    0.285   294.99
2130.50    0.286   296.11
2131.50    0.286   297.23
2132.50    0.287   298.34
2133.50    0.288   299.44
2134.50    0.289   300.54
2135.50    0.289   301.63
2136.50    0.290   302.71
2137.50    0.291   303.79
2138.50    0.292   304.87
2139.50    0.292   305.94
2140.50    0.293   307.01
2141.50    0.294   308.07
2142.50    0.294   309.12
2143.50    0.295   310.17
2144.50    0.296   311.22
2145.50    0.296   312.26
2146.50    0.297   313.29
2147.50    0.298   314.32
2148.50    0.298   315.35
2149.50    0.299   316.37
2150.50    0.300   317.39
2151.50    0.300   318.41
2152.50    0.301   319.42
2153.50    0.301   320.42
2154.50    0.302   321.42
2155.50    0.303   322.42
2156.50    0.303   323.42
2157.50    0.304   324.41
2158.50    0.304   325.40
2159.50    0.305   326.38






Disclaimer
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 15:22:09



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