| WDS: | A1808 | WDS ID/Discoverer |
| P: | 112.400 | Orbital period (years) |
| a: | 0.121 | Semi-major axis (arcseconds) |
| i: | 17.8 | Inclination (degrees) |
| Ω: | 163.1 | Longitude of ascending node (degrees) |
| T: | 1975.990 | Epoch of periastron passage (year) |
| e: | 0.827 | Eccentricity |
| ω: | 231.9 | Longitude of periastron (degrees) |
| Start-Year: | 1968.8 | Year |
| End-Year: | 2081.2 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for A1808 |
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| Position: | 005136.99+223724.4 | Epoch-2000 right ascension and declination |
| WDS-ID: | 00516+2237 | WDS designation |
| Discoverer Code: | A1808 | Discover designation and components |
| ADS number: | 701 | Aitken Double Star catalog |
| HD number: | 4934 | HD catalog number |
| Hipparcos number: | 4030 | Hipparcos catalog number |
| V1: | 7.93 | Magnitude of the primary |
| V2: | 8.22 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 2004 | Date of last observation |
| Orbit grade: | 3 | Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate |
| Flags: | n | Flags |
| Ephemerides: | Ephemerides | |
| Code: | Doc2005b | 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 0.214 210.52 -------------------------- 1968.80 0.077 265.90 1969.80 0.070 270.54 1970.80 0.062 276.30 1971.80 0.054 283.79 1972.80 0.045 294.11 1973.80 0.036 309.58 1974.80 0.027 335.55 1975.80 0.021 22.25 1976.80 0.023 79.64 1977.80 0.032 114.75 1978.80 0.042 133.44 1979.80 0.052 144.85 1980.80 0.061 152.69 1981.80 0.070 158.53 1982.80 0.078 163.11 1983.80 0.086 166.86 1984.80 0.093 170.01 1985.80 0.100 172.72 1986.80 0.106 175.10 1987.80 0.112 177.21 1988.80 0.118 179.12 1989.80 0.123 180.85 1990.80 0.128 182.43 1991.80 0.133 183.90 1992.80 0.138 185.26 1993.80 0.143 186.53 1994.80 0.147 187.73 1995.80 0.151 188.86 1996.80 0.155 189.93 1997.80 0.159 190.95 1998.80 0.163 191.92 1999.80 0.166 192.85 2000.80 0.169 193.74 2001.80 0.172 194.60 2002.80 0.176 195.43 2003.80 0.178 196.23 2004.80 0.181 197.01 2005.80 0.184 197.76 2006.80 0.186 198.50 2007.80 0.189 199.21 2008.80 0.191 199.91 2009.80 0.193 200.59 2010.80 0.195 201.25 2011.80 0.197 201.91 2012.80 0.199 202.55 2013.80 0.201 203.18 2014.80 0.202 203.79 2015.80 0.204 204.40 2016.80 0.205 205.00 2017.80 0.206 205.60 2018.80 0.208 206.18 2019.80 0.209 206.76 2020.80 0.210 207.33 2021.80 0.211 207.90 2022.80 0.211 208.47 2023.80 0.212 209.03 2024.80 0.213 209.58 2025.80 0.213 210.13 2026.80 0.214 210.68 2027.80 0.214 211.23 2028.80 0.214 211.78 2029.80 0.215 212.33 2030.80 0.215 212.87 2031.80 0.215 213.42 2032.80 0.214 213.96 2033.80 0.214 214.51 2034.80 0.214 215.05 2035.80 0.214 215.60 2036.80 0.213 216.15 2037.80 0.213 216.71 2038.80 0.212 217.26 2039.80 0.211 217.83 2040.80 0.210 218.39 2041.80 0.209 218.96 2042.80 0.208 219.53 2043.80 0.207 220.12 2044.80 0.206 220.70 2045.80 0.205 221.30 2046.80 0.203 221.90 2047.80 0.202 222.51 2048.80 0.200 223.13 2049.80 0.199 223.76 2050.80 0.197 224.41 2051.80 0.195 225.06 2052.80 0.193 225.73 2053.80 0.191 226.41 2054.80 0.189 227.11 2055.80 0.186 227.82 2056.80 0.184 228.55 2057.80 0.181 229.31 2058.80 0.179 230.08 2059.80 0.176 230.88 2060.80 0.173 231.71 2061.80 0.170 232.56 2062.80 0.167 233.45 2063.80 0.163 234.37 2064.80 0.160 235.33 2065.80 0.156 236.33 2066.80 0.153 237.38 2067.80 0.149 238.49 2068.80 0.145 239.65 2069.80 0.141 240.88 2070.80 0.136 242.20 2071.80 0.132 243.60 2072.80 0.127 245.10 2073.80 0.122 246.72 2074.80 0.117 248.48 2075.80 0.111 250.41 2076.80 0.106 252.55 2077.80 0.100 254.92 2078.80 0.094 257.61 2079.80 0.087 260.69 2080.80 0.080 264.28
| Double Star Calculator: | Version 1.2 ($Rev: 2397 $) |
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| Report created: |
2026-06-25 14:44:05 |