Double Star Calculator - Orbit

Orbital Elements for A361
WDS: A361 WDS ID/Discoverer
P: 189.800 Orbital period (years)
a: 0.321 Semi-major axis (arcseconds)
i: 126.8 Inclination (degrees)
Ω: 95.5 Longitude of ascending node (degrees)
T: 1979.800 Epoch of periastron passage (year)
e: 0.822 Eccentricity
ω: 254.5 Longitude of periastron (degrees)
Start-Year: 1930.1 Year
End-Year: 2119.9 Year
Epoch: 2026.5 Besselian Epoch
Further data from the WDS Sixth Catalog of Orbits for A361
Position: 190725.31+081059.1 Epoch-2000 right ascension and declination
WDS-ID: 19074+0811 WDS designation
Discoverer Code: A361 Discover designation and components
ADS number: 12054 Aitken Double Star catalog
HD number: 178216 HD catalog number
Hipparcos number: . Hipparcos catalog number
V1: 10.0 Magnitude of the primary
V2: 10.2 Magnitude of the secondary
Equinox: 2000 Equinox
Date: 2018 Date of last observation
Orbit grade: 4 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 A361



WDS 6th Orbit including measures of A361

-- 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 A361
Click to expand/collapse ephemeris:
Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.355    53.27
--------------------------
1930.10    0.294     3.83
1931.10    0.292     3.05
1932.10    0.289     2.26
1933.10    0.287     1.46
1934.10    0.284     0.64
1935.10    0.281   359.81
1936.10    0.279   358.96
1937.10    0.276   358.09
1938.10    0.273   357.20
1939.10    0.270   356.30
1940.10    0.267   355.37
1941.10    0.264   354.43
1942.10    0.261   353.46
1943.10    0.258   352.48
1944.10    0.255   351.46
1945.10    0.252   350.43
1946.10    0.249   349.36
1947.10    0.246   348.27
1948.10    0.242   347.15
1949.10    0.239   346.00
1950.10    0.236   344.82
1951.10    0.232   343.60
1952.10    0.229   342.35
1953.10    0.225   341.05
1954.10    0.222   339.72
1955.10    0.218   338.34
1956.10    0.214   336.91
1957.10    0.210   335.43
1958.10    0.206   333.90
1959.10    0.202   332.30
1960.10    0.198   330.64
1961.10    0.194   328.91
1962.10    0.190   327.10
1963.10    0.185   325.21
1964.10    0.181   323.22
1965.10    0.176   321.12
1966.10    0.171   318.91
1967.10    0.166   316.56
1968.10    0.160   314.05
1969.10    0.155   311.36
1970.10    0.148   308.46
1971.10    0.142   305.29
1972.10    0.135   301.80
1973.10    0.127   297.90
1974.10    0.118   293.44
1975.10    0.108   288.20
1976.10    0.096   281.78
1977.10    0.082   273.35
1978.10    0.065   260.93
1979.10    0.046   238.79
1980.10    0.035   194.34
1981.10    0.044   147.07
1982.10    0.065   123.58
1983.10    0.085   111.53
1984.10    0.104   104.06
1985.10    0.121    98.79
1986.10    0.136    94.76
1987.10    0.150    91.51
1988.10    0.163    88.79
1989.10    0.174    86.44
1990.10    0.185    84.38
1991.10    0.195    82.54
1992.10    0.205    80.87
1993.10    0.213    79.34
1994.10    0.222    77.93
1995.10    0.229    76.62
1996.10    0.237    75.39
1997.10    0.244    74.24
1998.10    0.250    73.15
1999.10    0.257    72.11
2000.10    0.263    71.12
2001.10    0.268    70.18
2002.10    0.274    69.27
2003.10    0.279    68.40
2004.10    0.284    67.56
2005.10    0.289    66.75
2006.10    0.294    65.96
2007.10    0.298    65.20
2008.10    0.302    64.46
2009.10    0.306    63.74
2010.10    0.310    63.04
2011.10    0.314    62.35
2012.10    0.317    61.68
2013.10    0.321    61.03
2014.10    0.324    60.39
2015.10    0.327    59.76
2016.10    0.330    59.14
2017.10    0.333    58.54
2018.10    0.336    57.94
2019.10    0.339    57.36
2020.10    0.341    56.78
2021.10    0.344    56.21
2022.10    0.346    55.65
2023.10    0.348    55.10
2024.10    0.351    54.55
2025.10    0.353    54.01
2026.10    0.355    53.48
2027.10    0.357    52.95
2028.10    0.358    52.43
2029.10    0.360    51.92
2030.10    0.362    51.40
2031.10    0.363    50.90
2032.10    0.365    50.39
2033.10    0.366    49.89
2034.10    0.367    49.40
2035.10    0.369    48.91
2036.10    0.370    48.42
2037.10    0.371    47.93
2038.10    0.372    47.45
2039.10    0.373    46.97
2040.10    0.374    46.49
2041.10    0.375    46.02
2042.10    0.376    45.54
2043.10    0.376    45.07
2044.10    0.377    44.60
2045.10    0.378    44.13
2046.10    0.378    43.66
2047.10    0.379    43.20
2048.10    0.379    42.73
2049.10    0.379    42.27
2050.10    0.380    41.81
2051.10    0.380    41.35
2052.10    0.380    40.88
2053.10    0.380    40.42
2054.10    0.380    39.96
2055.10    0.381    39.50
2056.10    0.381    39.04
2057.10    0.380    38.58
2058.10    0.380    38.12
2059.10    0.380    37.66
2060.10    0.380    37.20
2061.10    0.380    36.74
2062.10    0.380    36.27
2063.10    0.379    35.81
2064.10    0.379    35.35
2065.10    0.378    34.88
2066.10    0.378    34.42
2067.10    0.377    33.95
2068.10    0.377    33.48
2069.10    0.376    33.01
2070.10    0.376    32.54
2071.10    0.375    32.06
2072.10    0.374    31.59
2073.10    0.373    31.11
2074.10    0.373    30.63
2075.10    0.372    30.15
2076.10    0.371    29.67
2077.10    0.370    29.18
2078.10    0.369    28.69
2079.10    0.368    28.20
2080.10    0.367    27.71
2081.10    0.366    27.21
2082.10    0.365    26.71
2083.10    0.363    26.20
2084.10    0.362    25.70
2085.10    0.361    25.19
2086.10    0.360    24.67
2087.10    0.358    24.16
2088.10    0.357    23.64
2089.10    0.356    23.11
2090.10    0.354    22.58
2091.10    0.353    22.05
2092.10    0.351    21.51
2093.10    0.350    20.96
2094.10    0.348    20.42
2095.10    0.346    19.86
2096.10    0.345    19.30
2097.10    0.343    18.74
2098.10    0.341    18.17
2099.10    0.339    17.59
2100.10    0.338    17.01
2101.10    0.336    16.42
2102.10    0.334    15.83
2103.10    0.332    15.23
2104.10    0.330    14.62
2105.10    0.328    14.00
2106.10    0.326    13.38
2107.10    0.324    12.75
2108.10    0.322    12.11
2109.10    0.320    11.46
2110.10    0.318    10.80
2111.10    0.315    10.14
2112.10    0.313     9.46
2113.10    0.311     8.78
2114.10    0.309     8.08
2115.10    0.306     7.38
2116.10    0.304     6.66
2117.10    0.301     5.93
2118.10    0.299     5.19
2119.10    0.296     4.44






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 18:00:26



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