| WDS: | HDS781 | WDS ID/Discoverer |
| P: | 105.000 | Orbital period (years) |
| a: | 0.195 | Semi-major axis (arcseconds) |
| i: | 46.9 | Inclination (degrees) |
| Ω: | 100.1 | Longitude of ascending node (degrees) |
| T: | 1991.940 | Epoch of periastron passage (year) |
| e: | 0.277 | Eccentricity |
| ω: | 205.8 | Longitude of periastron (degrees) |
| Start-Year: | 1972.5 | Year |
| End-Year: | 2077.5 | Year |
| Epoch: | 2026.5 | Besselian Epoch |
Further data from the WDS Sixth Catalog of Orbits for HDS781 |
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| Position: | 054839.68-141851.7 | Epoch-2000 right ascension and declination |
| WDS-ID: | 05487-1419 | WDS designation |
| Discoverer Code: | HDS781 | Discover designation and components |
| ADS number: | . | Aitken Double Star catalog |
| HD number: | 38931 | HD catalog number |
| Hipparcos number: | 27444 | Hipparcos catalog number |
| V1: | 7.16 | Magnitude of the primary |
| V2: | 8.55 | Magnitude of the secondary |
| Equinox: | 2000 | Equinox |
| Date: | 2021 | 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: | Tok2021c | 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 0.227 91.54 -------------------------- 1972.50 0.135 214.44 1973.50 0.135 219.16 1974.50 0.135 223.85 1975.50 0.136 228.49 1976.50 0.137 233.06 1977.50 0.139 237.55 1978.50 0.140 241.96 1979.50 0.141 246.28 1980.50 0.143 250.51 1981.50 0.144 254.67 1982.50 0.145 258.77 1983.50 0.146 262.81 1984.50 0.146 266.83 1985.50 0.146 270.83 1986.50 0.146 274.86 1987.50 0.144 278.93 1988.50 0.143 283.07 1989.50 0.141 287.32 1990.50 0.138 291.71 1991.50 0.135 296.29 1992.50 0.132 301.10 1993.50 0.128 306.18 1994.50 0.124 311.56 1995.50 0.120 317.29 1996.50 0.117 323.38 1997.50 0.114 329.84 1998.50 0.111 336.66 1999.50 0.109 343.76 2000.50 0.108 351.06 2001.50 0.108 358.43 2002.50 0.109 5.75 2003.50 0.111 12.88 2004.50 0.114 19.70 2005.50 0.117 26.13 2006.50 0.122 32.12 2007.50 0.127 37.66 2008.50 0.132 42.75 2009.50 0.138 47.42 2010.50 0.144 51.71 2011.50 0.151 55.64 2012.50 0.157 59.26 2013.50 0.163 62.60 2014.50 0.169 65.69 2015.50 0.176 68.56 2016.50 0.182 71.25 2017.50 0.187 73.77 2018.50 0.193 76.14 2019.50 0.198 78.38 2020.50 0.203 80.51 2021.50 0.208 82.53 2022.50 0.212 84.47 2023.50 0.216 86.33 2024.50 0.220 88.13 2025.50 0.224 89.86 2026.50 0.227 91.54 2027.50 0.230 93.18 2028.50 0.233 94.77 2029.50 0.235 96.34 2030.50 0.237 97.87 2031.50 0.239 99.38 2032.50 0.241 100.86 2033.50 0.242 102.33 2034.50 0.243 103.79 2035.50 0.243 105.24 2036.50 0.243 106.69 2037.50 0.243 108.13 2038.50 0.243 109.58 2039.50 0.243 111.03 2040.50 0.242 112.49 2041.50 0.241 113.96 2042.50 0.239 115.44 2043.50 0.238 116.95 2044.50 0.236 118.47 2045.50 0.234 120.02 2046.50 0.232 121.60 2047.50 0.229 123.21 2048.50 0.226 124.86 2049.50 0.223 126.55 2050.50 0.220 128.29 2051.50 0.217 130.08 2052.50 0.214 131.93 2053.50 0.210 133.84 2054.50 0.206 135.81 2055.50 0.202 137.87 2056.50 0.198 140.00 2057.50 0.194 142.22 2058.50 0.190 144.54 2059.50 0.186 146.96 2060.50 0.182 149.50 2061.50 0.177 152.16 2062.50 0.173 154.95 2063.50 0.169 157.87 2064.50 0.165 160.95 2065.50 0.161 164.18 2066.50 0.157 167.57 2067.50 0.153 171.12 2068.50 0.150 174.84 2069.50 0.147 178.73 2070.50 0.144 182.78 2071.50 0.141 186.98 2072.50 0.139 191.33 2073.50 0.138 195.80 2074.50 0.136 200.37 2075.50 0.135 205.02 2076.50 0.135 209.72
| Double Star Calculator: | Version 1.2 ($Rev: 2397 $) |
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| Report created: |
2026-06-25 15:41:08 |