| WDS: | A2989 | WDS ID/Discoverer |
| P: | 175.000 | Orbital period (years) |
| a: | 0.74 | Semi-major axis (arcseconds) |
| i: | 78.7 | Inclination (degrees) |
| Ω: | 80.9 | Longitude of ascending node (degrees) |
| T: | 1968.300 | Epoch of periastron passage (year) |
| e: | 0.978 | Eccentricity |
| ω: | 281.3 | Longitude of periastron (degrees) |
| Start-Year: | 1937.5 | Year |
| End-Year: | 2112.5 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for A2989 |
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| Position: | 185324.53+255305.3 | Epoch-2000 right ascension and declination |
| WDS-ID: | 18534+2553 | WDS designation |
| Discoverer Code: | A2989 | Discover designation and components |
| ADS number: | 11802 | Aitken Double Star catalog |
| HD number: | 337117 | HD catalog number |
| Hipparcos number: | . | Hipparcos catalog number |
| V1: | 8.9 | Magnitude of the primary |
| V2: | 9.9 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 1995 | 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: | USN2002 | 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 0.323 206.29 -------------------------- 1937.50 0.390 231.36 1938.50 0.387 231.67 1939.50 0.383 231.98 1940.50 0.380 232.30 1941.50 0.376 232.62 1942.50 0.372 232.95 1943.50 0.368 233.28 1944.50 0.363 233.63 1945.50 0.358 233.98 1946.50 0.353 234.35 1947.50 0.348 234.72 1948.50 0.343 235.11 1949.50 0.337 235.51 1950.50 0.331 235.92 1951.50 0.324 236.35 1952.50 0.317 236.80 1953.50 0.310 237.27 1954.50 0.302 237.76 1955.50 0.294 238.28 1956.50 0.285 238.83 1957.50 0.275 239.42 1958.50 0.265 240.05 1959.50 0.254 240.73 1960.50 0.242 241.49 1961.50 0.228 242.32 1962.50 0.214 243.26 1963.50 0.197 244.36 1964.50 0.178 245.67 1965.50 0.155 247.33 1966.50 0.126 249.66 1967.50 0.084 253.84 1968.50 0.034 84.38 1969.50 0.066 101.15 1970.50 0.077 110.04 1971.50 0.084 117.14 1972.50 0.089 123.28 1973.50 0.094 128.77 1974.50 0.098 133.74 1975.50 0.103 138.28 1976.50 0.107 142.46 1977.50 0.112 146.30 1978.50 0.116 149.86 1979.50 0.121 153.15 1980.50 0.125 156.20 1981.50 0.130 159.04 1982.50 0.134 161.68 1983.50 0.139 164.14 1984.50 0.144 166.44 1985.50 0.149 168.60 1986.50 0.153 170.62 1987.50 0.158 172.52 1988.50 0.163 174.30 1989.50 0.168 175.99 1990.50 0.173 177.58 1991.50 0.177 179.08 1992.50 0.182 180.51 1993.50 0.187 181.86 1994.50 0.192 183.15 1995.50 0.196 184.38 1996.50 0.201 185.54 1997.50 0.206 186.66 1998.50 0.210 187.72 1999.50 0.215 188.74 2000.50 0.219 189.72 2001.50 0.224 190.66 2002.50 0.228 191.56 2003.50 0.233 192.42 2004.50 0.237 193.26 2005.50 0.242 194.06 2006.50 0.246 194.84 2007.50 0.250 195.58 2008.50 0.255 196.31 2009.50 0.259 197.01 2010.50 0.263 197.68 2011.50 0.267 198.34 2012.50 0.271 198.97 2013.50 0.275 199.59 2014.50 0.279 200.19 2015.50 0.283 200.77 2016.50 0.287 201.34 2017.50 0.291 201.89 2018.50 0.295 202.43 2019.50 0.298 202.95 2020.50 0.302 203.46 2021.50 0.306 203.96 2022.50 0.309 204.45 2023.50 0.313 204.92 2024.50 0.317 205.39 2025.50 0.320 205.84 2026.50 0.323 206.29 2027.50 0.327 206.72 2028.50 0.330 207.15 2029.50 0.334 207.57 2030.50 0.337 207.98 2031.50 0.340 208.38 2032.50 0.343 208.77 2033.50 0.346 209.16 2034.50 0.349 209.54 2035.50 0.352 209.92 2036.50 0.355 210.29 2037.50 0.358 210.65 2038.50 0.361 211.00 2039.50 0.364 211.35 2040.50 0.366 211.70 2041.50 0.369 212.04 2042.50 0.372 212.38 2043.50 0.374 212.71 2044.50 0.377 213.03 2045.50 0.379 213.36 2046.50 0.382 213.67 2047.50 0.384 213.99 2048.50 0.386 214.30 2049.50 0.389 214.60 2050.50 0.391 214.91 2051.50 0.393 215.21 2052.50 0.395 215.50 2053.50 0.397 215.80 2054.50 0.399 216.09 2055.50 0.401 216.38 2056.50 0.403 216.66 2057.50 0.405 216.94 2058.50 0.407 217.22 2059.50 0.408 217.50 2060.50 0.410 217.77 2061.50 0.412 218.05 2062.50 0.413 218.32 2063.50 0.414 218.59 2064.50 0.416 218.85 2065.50 0.417 219.12 2066.50 0.419 219.38 2067.50 0.420 219.65 2068.50 0.421 219.91 2069.50 0.422 220.17 2070.50 0.423 220.42 2071.50 0.424 220.68 2072.50 0.425 220.94 2073.50 0.426 221.19 2074.50 0.426 221.44 2075.50 0.427 221.70 2076.50 0.428 221.95 2077.50 0.428 222.20 2078.50 0.429 222.45 2079.50 0.429 222.70 2080.50 0.429 222.95 2081.50 0.430 223.20 2082.50 0.430 223.45 2083.50 0.430 223.70 2084.50 0.430 223.95 2085.50 0.430 224.20 2086.50 0.430 224.45 2087.50 0.430 224.70 2088.50 0.429 224.95 2089.50 0.429 225.20 2090.50 0.428 225.45 2091.50 0.428 225.70 2092.50 0.427 225.95 2093.50 0.426 226.20 2094.50 0.425 226.46 2095.50 0.425 226.71 2096.50 0.423 226.97 2097.50 0.422 227.22 2098.50 0.421 227.48 2099.50 0.420 227.74 2100.50 0.418 228.01 2101.50 0.417 228.27 2102.50 0.415 228.54 2103.50 0.413 228.81 2104.50 0.411 229.08 2105.50 0.409 229.35 2106.50 0.407 229.63 2107.50 0.404 229.91 2108.50 0.402 230.19 2109.50 0.399 230.48 2110.50 0.396 230.77 2111.50 0.393 231.07
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| Report created: |
2026-06-25 17:57:03 |