| WDS: | A871 | WDS ID/Discoverer |
| P: | 149.000 | Orbital period (years) |
| a: | 0.316 | Semi-major axis (arcseconds) |
| i: | 57.0 | Inclination (degrees) |
| Ω: | 72.1 | Longitude of ascending node (degrees) |
| T: | 2024.000 | Epoch of periastron passage (year) |
| e: | 0.67 | Eccentricity |
| ω: | 248.0 | Longitude of periastron (degrees) |
| Start-Year: | 1950.5 | Year |
| End-Year: | 2099.5 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for A871 |
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| Position: | 202724.67+724438.2 | Epoch-2000 right ascension and declination |
| WDS-ID: | 20274+7245 | WDS designation |
| Discoverer Code: | A871 | Discover designation and components |
| ADS number: | 13914 | Aitken Double Star catalog |
| HD number: | . | HD catalog number |
| Hipparcos number: | . | Hipparcos catalog number |
| V1: | 9.4 | Magnitude of the primary |
| V2: | 9.6 | Magnitude of the secondary |
| Equinox: | Equinox | |
| Date: | 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: | Hei1998 | 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 0.068 10.91 -------------------------- 1950.50 0.329 126.42 1951.50 0.327 127.33 1952.50 0.325 128.25 1953.50 0.322 129.18 1954.50 0.320 130.13 1955.50 0.317 131.09 1956.50 0.315 132.06 1957.50 0.312 133.06 1958.50 0.309 134.07 1959.50 0.307 135.09 1960.50 0.304 136.14 1961.50 0.302 137.20 1962.50 0.299 138.29 1963.50 0.296 139.39 1964.50 0.293 140.51 1965.50 0.291 141.65 1966.50 0.288 142.82 1967.50 0.285 144.01 1968.50 0.282 145.22 1969.50 0.280 146.45 1970.50 0.277 147.71 1971.50 0.274 148.99 1972.50 0.272 150.30 1973.50 0.269 151.64 1974.50 0.266 153.00 1975.50 0.264 154.39 1976.50 0.261 155.81 1977.50 0.258 157.25 1978.50 0.256 158.73 1979.50 0.253 160.23 1980.50 0.251 161.77 1981.50 0.248 163.33 1982.50 0.246 164.92 1983.50 0.244 166.55 1984.50 0.241 168.21 1985.50 0.239 169.90 1986.50 0.237 171.62 1987.50 0.235 173.37 1988.50 0.233 175.16 1989.50 0.231 176.98 1990.50 0.229 178.83 1991.50 0.227 180.71 1992.50 0.225 182.62 1993.50 0.223 184.57 1994.50 0.221 186.55 1995.50 0.219 188.56 1996.50 0.218 190.60 1997.50 0.216 192.68 1998.50 0.214 194.78 1999.50 0.213 196.92 2000.50 0.211 199.10 2001.50 0.209 201.30 2002.50 0.208 203.55 2003.50 0.206 205.83 2004.50 0.204 208.14 2005.50 0.202 210.50 2006.50 0.200 212.91 2007.50 0.198 215.36 2008.50 0.196 217.88 2009.50 0.193 220.45 2010.50 0.190 223.10 2011.50 0.187 225.84 2012.50 0.183 228.68 2013.50 0.179 231.64 2014.50 0.174 234.77 2015.50 0.168 238.09 2016.50 0.161 241.68 2017.50 0.153 245.61 2018.50 0.144 250.03 2019.50 0.132 255.13 2020.50 0.119 261.29 2021.50 0.104 269.11 2022.50 0.088 279.74 2023.50 0.072 295.19 2024.50 0.061 317.85 2025.50 0.059 345.99 2026.50 0.068 10.91 2027.50 0.084 28.14 2028.50 0.102 39.52 2029.50 0.121 47.39 2030.50 0.139 53.17 2031.50 0.156 57.64 2032.50 0.173 61.25 2033.50 0.188 64.26 2034.50 0.201 66.84 2035.50 0.214 69.10 2036.50 0.226 71.11 2037.50 0.238 72.92 2038.50 0.248 74.57 2039.50 0.258 76.10 2040.50 0.267 77.52 2041.50 0.275 78.85 2042.50 0.283 80.10 2043.50 0.290 81.29 2044.50 0.297 82.42 2045.50 0.303 83.50 2046.50 0.309 84.54 2047.50 0.315 85.54 2048.50 0.320 86.51 2049.50 0.325 87.44 2050.50 0.329 88.35 2051.50 0.334 89.24 2052.50 0.337 90.11 2053.50 0.341 90.96 2054.50 0.344 91.79 2055.50 0.347 92.61 2056.50 0.350 93.41 2057.50 0.353 94.20 2058.50 0.355 94.98 2059.50 0.357 95.75 2060.50 0.359 96.51 2061.50 0.360 97.26 2062.50 0.362 98.01 2063.50 0.363 98.75 2064.50 0.364 99.49 2065.50 0.365 100.22 2066.50 0.366 100.95 2067.50 0.367 101.68 2068.50 0.367 102.40 2069.50 0.368 103.13 2070.50 0.368 103.85 2071.50 0.368 104.57 2072.50 0.368 105.29 2073.50 0.368 106.01 2074.50 0.367 106.73 2075.50 0.367 107.46 2076.50 0.366 108.18 2077.50 0.366 108.91 2078.50 0.365 109.64 2079.50 0.364 110.38 2080.50 0.363 111.11 2081.50 0.362 111.86 2082.50 0.361 112.60 2083.50 0.360 113.35 2084.50 0.358 114.11 2085.50 0.357 114.88 2086.50 0.355 115.64 2087.50 0.354 116.42 2088.50 0.352 117.20 2089.50 0.350 118.00 2090.50 0.348 118.79 2091.50 0.347 119.60 2092.50 0.345 120.42 2093.50 0.343 121.24 2094.50 0.341 122.08 2095.50 0.338 122.93 2096.50 0.336 123.78 2097.50 0.334 124.65 2098.50 0.332 125.53
| Double Star Calculator: | Version 1.2 ($Rev: 2397 $) |
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| Report created: |
2026-06-25 18:15:10 |