| WDS: | A998 | WDS ID/Discoverer |
| P: | 158.245 | Orbital period (years) |
| a: | 0.2814 | Semi-major axis (arcseconds) |
| i: | 123.76 | Inclination (degrees) |
| Ω: | 170.76 | Longitude of ascending node (degrees) |
| T: | 2010.160 | Epoch of periastron passage (year) |
| e: | 0.6922 | Eccentricity |
| ω: | 46.91 | Longitude of periastron (degrees) |
| Start-Year: | 1945.8775 | Year |
| End-Year: | 2104.1225 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for A998 |
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| Position: | 040854.55+461340.2 | Epoch-2000 right ascension and declination |
| WDS-ID: | 04089+4614 | WDS designation |
| Discoverer Code: | A998 | Discover designation and components |
| ADS number: | 3007 | Aitken Double Star catalog |
| HD number: | 25987 | HD catalog number |
| Hipparcos number: | 19366 | Hipparcos catalog number |
| V1: | 7.87 | Magnitude of the primary |
| V2: | 8.50 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 1989 | Date of last observation |
| Orbit grade: | 3 | Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate |
| Flags: | Flags | |
| Ephemerides: | Ephemerides | |
| Code: | Pop2000a | 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 0.230 356.76 -------------------------- 1945.88 0.338 311.74 1946.88 0.335 311.10 1947.88 0.331 310.44 1948.88 0.328 309.78 1949.88 0.324 309.10 1950.88 0.320 308.40 1951.88 0.317 307.69 1952.88 0.313 306.96 1953.88 0.309 306.21 1954.88 0.305 305.45 1955.88 0.301 304.66 1956.88 0.297 303.85 1957.88 0.293 303.02 1958.88 0.289 302.16 1959.88 0.284 301.28 1960.88 0.280 300.37 1961.88 0.276 299.44 1962.88 0.271 298.47 1963.88 0.267 297.47 1964.88 0.262 296.44 1965.88 0.258 295.37 1966.88 0.253 294.26 1967.88 0.248 293.11 1968.88 0.244 291.92 1969.88 0.239 290.67 1970.88 0.234 289.38 1971.88 0.230 288.04 1972.88 0.225 286.64 1973.88 0.220 285.18 1974.88 0.215 283.66 1975.88 0.211 282.06 1976.88 0.206 280.39 1977.88 0.201 278.65 1978.88 0.196 276.82 1979.88 0.192 274.90 1980.88 0.187 272.89 1981.88 0.183 270.77 1982.88 0.178 268.55 1983.88 0.174 266.22 1984.88 0.170 263.77 1985.88 0.165 261.19 1986.88 0.161 258.48 1987.88 0.157 255.64 1988.88 0.154 252.65 1989.88 0.150 249.52 1990.88 0.147 246.25 1991.88 0.144 242.83 1992.88 0.141 239.26 1993.88 0.138 235.54 1994.88 0.136 231.68 1995.88 0.133 227.68 1996.88 0.131 223.55 1997.88 0.129 219.29 1998.88 0.127 214.91 1999.88 0.126 210.39 2000.88 0.124 205.75 2001.88 0.122 200.97 2002.88 0.120 196.01 2003.88 0.117 190.84 2004.88 0.113 185.37 2005.88 0.108 179.47 2006.88 0.102 172.93 2007.88 0.094 165.37 2008.88 0.083 156.15 2009.88 0.072 144.16 2010.88 0.061 127.69 2011.88 0.054 105.47 2012.88 0.054 80.17 2013.88 0.062 58.25 2014.88 0.075 42.50 2015.88 0.089 31.65 2016.88 0.105 23.97 2017.88 0.121 18.26 2018.88 0.136 13.84 2019.88 0.150 10.30 2020.88 0.164 7.36 2021.88 0.177 4.87 2022.88 0.190 2.72 2023.88 0.202 0.83 2024.88 0.213 359.15 2025.88 0.224 357.63 2026.88 0.234 356.25 2027.88 0.244 354.99 2028.88 0.253 353.81 2029.88 0.262 352.72 2030.88 0.270 351.70 2031.88 0.278 350.74 2032.88 0.286 349.83 2033.88 0.293 348.97 2034.88 0.300 348.15 2035.88 0.307 347.36 2036.88 0.313 346.61 2037.88 0.319 345.89 2038.88 0.325 345.19 2039.88 0.330 344.52 2040.88 0.335 343.86 2041.88 0.340 343.23 2042.88 0.345 342.61 2043.88 0.349 342.01 2044.88 0.353 341.43 2045.88 0.357 340.85 2046.88 0.361 340.29 2047.88 0.365 339.74 2048.88 0.368 339.21 2049.88 0.371 338.68 2050.88 0.374 338.16 2051.88 0.377 337.64 2052.88 0.379 337.14 2053.88 0.382 336.64 2054.88 0.384 336.15 2055.88 0.386 335.66 2056.88 0.388 335.18 2057.88 0.390 334.70 2058.88 0.391 334.22 2059.88 0.393 333.75 2060.88 0.394 333.29 2061.88 0.395 332.82 2062.88 0.396 332.36 2063.88 0.397 331.90 2064.88 0.398 331.44 2065.88 0.398 330.99 2066.88 0.399 330.53 2067.88 0.399 330.08 2068.88 0.399 329.62 2069.88 0.399 329.17 2070.88 0.399 328.72 2071.88 0.399 328.26 2072.88 0.399 327.81 2073.88 0.398 327.35 2074.88 0.398 326.90 2075.88 0.397 326.44 2076.88 0.396 325.98 2077.88 0.396 325.52 2078.88 0.395 325.06 2079.88 0.394 324.59 2080.88 0.392 324.13 2081.88 0.391 323.65 2082.88 0.390 323.18 2083.88 0.388 322.70 2084.88 0.387 322.22 2085.88 0.385 321.74 2086.88 0.383 321.25 2087.88 0.381 320.75 2088.88 0.379 320.25 2089.88 0.377 319.75 2090.88 0.375 319.24 2091.88 0.373 318.72 2092.88 0.370 318.19 2093.88 0.368 317.66 2094.88 0.365 317.13 2095.88 0.363 316.58 2096.88 0.360 316.03 2097.88 0.357 315.47 2098.88 0.354 314.90 2099.88 0.351 314.32 2100.88 0.348 313.73 2101.88 0.345 313.13 2102.88 0.342 312.51 2103.88 0.339 311.89
| Double Star Calculator: | Version 1.2 ($Rev: 2397 $) |
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| Report created: |
2026-06-25 15:18:09 |