| WDS: | A2181 | WDS ID/Discoverer |
| P: | 285.690 | Orbital period (years) |
| a: | 0.4331 | Semi-major axis (arcseconds) |
| i: | 11.94 | Inclination (degrees) |
| Ω: | 137.33 | Longitude of ascending node (degrees) |
| T: | 1962.370 | Epoch of periastron passage (year) |
| e: | 0.1259 | Eccentricity |
| ω: | 245.12 | Longitude of periastron (degrees) |
| Start-Year: | 1882.155 | Year |
| End-Year: | 2167.845 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for A2181 |
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| Position: | 161652.42+011317.3 | Epoch-2000 right ascension and declination |
| WDS-ID: | 16169+0113 | WDS designation |
| Discoverer Code: | A2181 | Discover designation and components |
| ADS number: | 9989 | Aitken Double Star catalog |
| HD number: | 146564 | HD catalog number |
| Hipparcos number: | 79774 | Hipparcos catalog number |
| V1: | 10.12 | Magnitude of the primary |
| V2: | 10.20 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 1981 | Date of last observation |
| Orbit grade: | 5 | Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate |
| Flags: | Flags | |
| Ephemerides: | Ephemerides | |
| Code: | Pop1995d | Reference |
-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --
| Green plus signs: | Visual (micrometric) measures |
| Violet asterisks: | Photographic measures |
| Blue symbols: | Various interferometric techniques |
| Dot-dash line: | Indicates the line of nodes |
Year Sep[“] PA[°] --------------------------------------------- 2026.50 0.430 118.11 -------------------------- 1882.15 0.444 268.38 1883.15 0.443 269.54 1884.15 0.442 270.71 1885.15 0.442 271.88 1886.15 0.441 273.06 1887.15 0.440 274.25 1888.15 0.439 275.44 1889.15 0.438 276.63 1890.15 0.437 277.83 1891.15 0.436 279.03 1892.15 0.435 280.24 1893.15 0.434 281.46 1894.15 0.433 282.68 1895.15 0.432 283.91 1896.15 0.431 285.14 1897.15 0.430 286.38 1898.15 0.429 287.62 1899.15 0.428 288.87 1900.15 0.427 290.13 1901.15 0.426 291.39 1902.15 0.425 292.66 1903.15 0.424 293.93 1904.15 0.423 295.21 1905.15 0.422 296.50 1906.15 0.421 297.79 1907.15 0.420 299.09 1908.15 0.418 300.40 1909.15 0.417 301.71 1910.15 0.416 303.03 1911.15 0.415 304.36 1912.15 0.414 305.69 1913.15 0.413 307.03 1914.15 0.412 308.38 1915.15 0.411 309.74 1916.15 0.410 311.10 1917.15 0.409 312.47 1918.15 0.408 313.85 1919.15 0.406 315.23 1920.15 0.405 316.63 1921.15 0.404 318.03 1922.15 0.403 319.43 1923.15 0.402 320.85 1924.15 0.401 322.27 1925.15 0.400 323.70 1926.15 0.399 325.14 1927.15 0.398 326.59 1928.15 0.397 328.04 1929.15 0.396 329.50 1930.15 0.395 330.97 1931.15 0.394 332.45 1932.15 0.393 333.94 1933.15 0.391 335.43 1934.15 0.390 336.93 1935.15 0.389 338.44 1936.15 0.389 339.95 1937.15 0.388 341.48 1938.15 0.387 343.01 1939.15 0.386 344.55 1940.15 0.385 346.09 1941.15 0.384 347.65 1942.15 0.383 349.21 1943.15 0.382 350.77 1944.15 0.381 352.35 1945.15 0.381 353.93 1946.15 0.380 355.52 1947.15 0.379 357.11 1948.15 0.378 358.71 1949.15 0.378 0.32 1950.15 0.377 1.93 1951.15 0.376 3.54 1952.15 0.376 5.17 1953.15 0.375 6.79 1954.15 0.375 8.43 1955.15 0.374 10.06 1956.15 0.374 11.70 1957.15 0.373 13.35 1958.15 0.373 14.99 1959.15 0.373 16.64 1960.15 0.372 18.30 1961.15 0.372 19.95 1962.15 0.372 21.61 1963.15 0.372 23.27 1964.15 0.372 24.93 1965.15 0.372 26.59 1966.15 0.371 28.26 1967.15 0.371 29.92 1968.15 0.372 31.58 1969.15 0.372 33.24 1970.15 0.372 34.90 1971.15 0.372 36.56 1972.15 0.372 38.22 1973.15 0.372 39.87 1974.15 0.373 41.53 1975.15 0.373 43.18 1976.15 0.374 44.82 1977.15 0.374 46.46 1978.15 0.375 48.10 1979.15 0.375 49.73 1980.15 0.376 51.36 1981.15 0.376 52.99 1982.15 0.377 54.60 1983.15 0.378 56.22 1984.15 0.378 57.82 1985.15 0.379 59.42 1986.15 0.380 61.01 1987.15 0.381 62.60 1988.15 0.382 64.18 1989.15 0.383 65.75 1990.15 0.384 67.31 1991.15 0.385 68.87 1992.15 0.386 70.41 1993.15 0.387 71.95 1994.15 0.388 73.48 1995.15 0.389 75.00 1996.15 0.390 76.52 1997.15 0.391 78.02 1998.15 0.392 79.52 1999.15 0.394 81.00 2000.15 0.395 82.48 2001.15 0.396 83.95 2002.15 0.397 85.41 2003.15 0.399 86.85 2004.15 0.400 88.29 2005.15 0.401 89.72 2006.15 0.402 91.15 2007.15 0.404 92.56 2008.15 0.405 93.96 2009.15 0.406 95.35 2010.15 0.408 96.74 2011.15 0.409 98.11 2012.15 0.411 99.48 2013.15 0.412 100.83 2014.15 0.413 102.18 2015.15 0.415 103.52 2016.15 0.416 104.85 2017.15 0.417 106.17 2018.15 0.419 107.48 2019.15 0.420 108.79 2020.15 0.422 110.08 2021.15 0.423 111.37 2022.15 0.424 112.65 2023.15 0.426 113.92 2024.15 0.427 115.18 2025.15 0.428 116.43 2026.15 0.430 117.68 2027.15 0.431 118.92 2028.15 0.432 120.15 2029.15 0.434 121.37 2030.15 0.435 122.59 2031.15 0.436 123.80 2032.15 0.438 125.00 2033.15 0.439 126.19 2034.15 0.440 127.38 2035.15 0.441 128.56 2036.15 0.442 129.74 2037.15 0.444 130.91 2038.15 0.445 132.07 2039.15 0.446 133.23 2040.15 0.447 134.38 2041.15 0.448 135.52 2042.15 0.449 136.66 2043.15 0.451 137.79 2044.15 0.452 138.92 2045.15 0.453 140.04 2046.15 0.454 141.16 2047.15 0.455 142.27 2048.15 0.456 143.38 2049.15 0.457 144.48 2050.15 0.458 145.58 2051.15 0.459 146.67 2052.15 0.460 147.76 2053.15 0.460 148.84 2054.15 0.461 149.92 2055.15 0.462 151.00 2056.15 0.463 152.07 2057.15 0.464 153.14 2058.15 0.465 154.20 2059.15 0.465 155.26 2060.15 0.466 156.32 2061.15 0.467 157.38 2062.15 0.468 158.43 2063.15 0.468 159.47 2064.15 0.469 160.52 2065.15 0.470 161.56 2066.15 0.470 162.60 2067.15 0.471 163.63 2068.15 0.471 164.67 2069.15 0.472 165.70 2070.15 0.473 166.73 2071.15 0.473 167.75 2072.15 0.474 168.78 2073.15 0.474 169.80 2074.15 0.475 170.82 2075.15 0.475 171.84 2076.15 0.475 172.85 2077.15 0.476 173.87 2078.15 0.476 174.88 2079.15 0.477 175.89 2080.15 0.477 176.90 2081.15 0.477 177.91 2082.15 0.477 178.91 2083.15 0.478 179.92 2084.15 0.478 180.92 2085.15 0.478 181.93 2086.15 0.478 182.93 2087.15 0.479 183.93 2088.15 0.479 184.93 2089.15 0.479 185.93 2090.15 0.479 186.93 2091.15 0.479 187.93 2092.15 0.479 188.93 2093.15 0.479 189.93 2094.15 0.479 190.93 2095.15 0.480 191.93 2096.15 0.480 192.92 2097.15 0.480 193.92 2098.15 0.480 194.92 2099.15 0.479 195.92 2100.15 0.479 196.91 2101.15 0.479 197.91 2102.15 0.479 198.91 2103.15 0.479 199.91 2104.15 0.479 200.91 2105.15 0.479 201.91 2106.15 0.479 202.91 2107.15 0.479 203.91 2108.15 0.478 204.91 2109.15 0.478 205.91 2110.15 0.478 206.92 2111.15 0.478 207.92 2112.15 0.478 208.93 2113.15 0.477 209.93 2114.15 0.477 210.94 2115.15 0.477 211.95 2116.15 0.476 212.96 2117.15 0.476 213.97 2118.15 0.476 214.98 2119.15 0.475 216.00 2120.15 0.475 217.01 2121.15 0.475 218.03 2122.15 0.474 219.05 2123.15 0.474 220.07 2124.15 0.474 221.09 2125.15 0.473 222.11 2126.15 0.473 223.14 2127.15 0.472 224.17 2128.15 0.472 225.20 2129.15 0.471 226.23 2130.15 0.471 227.26 2131.15 0.470 228.30 2132.15 0.470 229.34 2133.15 0.469 230.38 2134.15 0.469 231.42 2135.15 0.468 232.46 2136.15 0.468 233.51 2137.15 0.467 234.56 2138.15 0.466 235.62 2139.15 0.466 236.67 2140.15 0.465 237.73 2141.15 0.465 238.79 2142.15 0.464 239.86 2143.15 0.463 240.92 2144.15 0.463 241.99 2145.15 0.462 243.07 2146.15 0.461 244.14 2147.15 0.461 245.22 2148.15 0.460 246.30 2149.15 0.459 247.39 2150.15 0.459 248.48 2151.15 0.458 249.57 2152.15 0.457 250.67 2153.15 0.456 251.77 2154.15 0.456 252.87 2155.15 0.455 253.98 2156.15 0.454 255.09 2157.15 0.453 256.20 2158.15 0.452 257.32 2159.15 0.452 258.44 2160.15 0.451 259.57 2161.15 0.450 260.70 2162.15 0.449 261.84 2163.15 0.448 262.98 2164.15 0.448 264.12 2165.15 0.447 265.27 2166.15 0.446 266.42 2167.15 0.445 267.58
| Double Star Calculator: | Version 1.2 ($Rev: 2397 $) |
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| Report created: |
2026-06-25 17:24:49 |