Navigationsstjerner

Navigationsstjerner er et samlingsnavn på de 58 stjerner som udnyttes ved astronomisk navigation. Stjernerne samt de astronomiske koordinater, deklinationen og timevinklen (SHA) findes i Nautikalalmanakken, the Nautical Almanac, som bruges når navigatørens position skal bestemmes. Allerede 1802 blev navigationsstjernerne omtalt af Nathaniel Bowditch i the American Practical Navigator og siden da har de været anvendt til denne navigationsmetode.
Navigationsstjerner
I tabellen er stjernerne nummereret fra vest til øst med mindskende timevinkel. Navnet gengives som det skrives i Nautikalalmanakken.
| Nr. | Navn | Tilsyneladende størrelsesklasse |
SHA | Deklination |
|---|---|---|---|---|
| 7 | Acamar | 3,20 | 316 | S 40° |
| 5 | Achernar | 0,50 | 336 | S 57° |
| 30 | Acrux | 1,40 | 174 | S 63° |
| 19 | Adhara | 1,51 | 256 | S 29° |
| 10 | Aldebaran | 0,85 | 291 | N 16° |
| 32 | Alioth | 1,76 | 167 | N 56° |
| 34 | Alkaid | 1,85 | 153 | N 49° |
| 55 | Al Na'ir | 1,74 | 028 | S 47° |
| 15 | Alnilam | 1,70 | 276 | S 01° |
| 25 | Alphard | 2,00 | 218 | S 09° |
| 41 | Alphecca | 2,24 | 127 | N 27° |
| 1 | Alpheratz | 2,06 | 358 | N 29° |
| 51 | Altair | 0,77 | 063 | N 09° |
| 2 | Ankaa | 2,37 | 354 | S 42° |
| 42 | Antares | 1,09 | 113 | S 26° |
| 37 | Arcturus | -0,04 | 146 | N 19° |
| 43 | Atria | 1,92 | 108 | S 69° |
| 22 | Avior | 2,40 | 234 | S 59° |
| 13 | Bellatrix | 1,64 | 279 | N 09° |
| 16 | Betelgeuse | 0,58 | 271 | N 07° |
| 17 | Canopus | -0,72 | 264 | S 53° |
| 12 | Capella | 0,71 | 281 | N 46° |
| 53 | Deneb | 1,25 | 050 | N 45° |
| 28 | Denebola | 2,14 | 183 | N 15° |
| 4 | Diphida | 2,04 | 349 | S 18° |
| 27 | Dubhe | 1,87 | 194 | N 62° |
| 14 | Elnath | 1,68 | 279 | N 29° |
| 47 | Eltanin | 2,23 | 091 | N 51° |
| 54 | Enif | 2,40 | 034 | N 10° |
| 56 | Fomalhaut | 1,16 | 016 | S 30° |
| 31 | Gacrux | 1,63 | 172 | S 57° |
| 29 | Gienah | 2,80 | 176 | S 17° |
| 35 | Hadar | 0,60 | 149 | S 60° |
| 6 | Hamal | 2,00 | 328 | N 23° |
| 48 | Kaus Australis | 1,80 | 084 | S 34° |
| 40 | Kochab | 2,08 | 137 | N 74° |
| 57 | Markab | 2,49 | 014 | N 15° |
| 8 | Menkar | 2,50 | 315 | N 04° |
| 36 | Menkent | 2,06 | 149 | S 36° |
| 24 | Miaplacidus | 1,70 | 222 | S 70° |
| 9 | Mirfak | 1,82 | 309 | N 50° |
| 50 | Nunki | 2,06 | 076 | S 26° |
| 52 | Peacock | 1,91 | 054 | S 57° |
| 21 | Pollux | 1,15 | 244 | N 28° |
| 20 | Procyon | 0,34 | 245 | N 05° |
| 46 | Rasalhague | 2,10 | 096 | N 13° |
| 26 | Regulus | 1,35 | 208 | N 12° |
| 11 | Rigel | 0,12 | 282 | S 08° |
| 38 | Rigel Kentaurus | -0,01 | 140 | S 61° |
| 44 | Sabik | 2,43 | 103 | S 16° |
| 3 | Schedar | 2,25 | 350 | N 56° |
| 45 | Shaula | 1,62 | 097 | S 37° |
| 18 | Sirius | -1,47 | 259 | S 17° |
| 33 | Spica | 1,04 | 159 | S 11° |
| 23 | Suhail | 2,23 | 223 | S 43° |
| 49 | Vega | 0,03 | 081 | N 39° |
| 39 | Zuben'ubi | 3,28 | 138 | S 16° |
Se også
Kilder
- Chefen för Marinen (1983). Navigation 2. Astronomisk navigation, tidvattenlära. ISBN 91-38-07858-9. (1983). Chefen för Marinen (1983). Navigation 2. Astronomisk navigation, tidvattenlära. ISBN 91-38-07858-9.
- Government Printing Office (2007). Astronomical almanac for the year 2009 and its companion The astronomical almanac online: : data for astronomy, space sciences, geodesy, surveying, navigation and other applications. ISBN 978-0-11-887342-0. (2007). Government Printing Office (2007). Astronomical almanac for the year 2009 and its companion The astronomical almanac online: : data for astronomy, space sciences, geodesy, surveying, navigation and other applications. ISBN 978-0-11-887342-0.
Eksterne links
- American Practical Navigator Arkiveret 1. december 2009 hos Wayback Machine U.S. National Geospatial-Intelligence Agency (engelsk)
- Navigational Star Chart Arkiveret 5. september 2015 hos Wayback Machine U.S. Naval Observatory (engelsk)
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