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The Handbook of the British Astronomical Association THE HANDBOOK OF THE BRITISH ASTRONOMICAL ASSOCIATION 2012 Saturn’s great white spot of 2011 2011 October ISSN 0068-130-X CONTENTS CALENDAR 2012 . 2 PREFACE. 3 HIGHLIGHTS FOR 2012. 4 SKY DIARY . .. 5 VISIBILITY OF PLANETS. 6 RISING AND SETTING OF THE PLANETS IN LATITUDES 52°N AND 35°S. 7-8 ECLIPSES . 9-15 TIME. 16-17 EARTH AND SUN. 18-20 MOON . 21 SUN’S SELENOGRAPHIC COLONGITUDE. 22 MOONRISE AND MOONSET . 23-27 LUNAR OCCULTATIONS . 28-34 GRAZING LUNAR OCCULTATIONS. 35-36 PLANETS – EXPLANATION OF TABLES. 37 APPEARANCE OF PLANETS. 38 MERCURY. 39-40 VENUS. 41 MARS. 42-43 ASTEROIDS AND DWARF PLANETS. 44-60 JUPITER . 61-64 SATELLITES OF JUPITER . 65-79 SATURN. 80-83 SATELLITES OF SATURN . 84-87 URANUS. 88 NEPTUNE. 89 COMETS. 90-96 METEOR DIARY . 97-99 VARIABLE STARS . 100-105 Algol; λ Tauri; RZ Cassiopeiae; Mira Stars; eta Geminorum EPHEMERIDES OF DOUBLE STARS . 106-107 BRIGHT STARS . 108 ACTIVE GALAXIES . 109 INTERNET RESOURCES. 110-111 GREEK ALPHABET. 111 ERRATA . 112 Front Cover: Saturn’s great white spot of 2011: Image taken on 2011 March 21 00:10 UT by Damian Peach using a 356mm reflector and PGR Flea3 camera from Selsey, UK. Processed with Registax and Photoshop. British Astronomical Association HANDBOOK FOR 2012 NINETY-FIRST YEAR OF PUBLICATION BURLINGTON HOUSE, PICCADILLY, LONDON, W1J 0DU Telephone 020 7734 4145 2 CALENDAR 2012 January February March April May June July August September October November December Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day Day of of of of of of of of of of of of of of of of of of of of of of of of of Month Week Year Week Year Week Year Week Year Week Year Week Year Week Year Week Year Week Year Week Year Week Year Week Year 1 Sun. 1 Wed. 32 Thu. 61 Sun. 92 Tue. 122 Fri. 153 Sun. 183 Wed. 214 Sat. 245 Mon. 275 Thu. 306 Sat. 336 2 Mon. 2 Thu. 33 Fri. 62 Mon. 93 Wed. 123 Sat. 154 Mon. 184 Thu. 215 Sun. 246 Tue. 276 Fri. 307 Sun. 337 3 Tue. 3 Fri. 34 Sat. 63 Tue. 94 Thu. 124 Sun. 155 Tue. 185 Fri. 216 Mon. 247 Wed. 277 Sat. 308 Mon. 338 4 Wed. 4 Sat. 35 Sun. 64 Wed. 95 Fri. 125 Mon. 156 Wed. 186 Sat. 217 Tue. 248 Thu. 278 Sun. 309 Tue. 339 5 Thu. 5 Sun. 36 Mon. 65 Thu. 96 Sat. 126 Tue. 157 Thu. 187 Sun. 218 Wed. 249 Fri. 279 Mon. 310 Wed. 340 6 Fri. 6 Mon. 37 Tue. 66 Fri. 97 Sun. 127 Wed. 158 Fri. 188 Mon. 219 Thu. 250 Sat. 280 Tue. 311 Thu. 341 7 Sat. 7 Tue. 38 Wed. 67 Sat. 98 Mon. 128 Thu. 159 Sat. 189 Tue. 220 Fri. 251 Sun. 281 Wed. 312 Fri. 342 8 Sun. 8 Wed. 39 Thu. 68 Sun. 99 Tue. 129 Fri. 160 Sun. 190 Wed. 221 Sat. 252 Mon. 282 Thu. 313 Sat. 343 9 Mon. 9 Thu. 40 Fri. 69 Mon. 100 Wed. 130 Sat. 161 Mon. 191 Thu. 222 Sun. 253 Tue. 283 Fri. 314 Sun. 344 10 Tue. 10 Fri. 41 Sat. 70 Tue. 101 Thu. 131 Sun. 162 Tue. 192 Fri. 223 Mon. 254 Wed. 284 Sat. 315 Mon. 345 Mon. 163 Wed. 193 Sat. 224 Tue. 255 Thu. 285 Sun. 316 Tue. 346 11 Wed. 11 Sat. 42 Sun. 71 Wed. 102 Fri. 132 Calendar 12 Thu. 12 Sun. 43 Mon. 72 Thu. 103 Sat. 133 Tue. 164 Thu. 194 Sun. 225 Wed. 256 Fri. 286 Mon. 317 Wed. 347 13 Fri. 13 Mon. 44 Tue. 73 Fri. 104 Sun. 134 Wed. 165 Fri. 195 Mon. 226 Thu. 257 Sat. 287 Tue. 318 Thu. 348 14 Sat. 14 Tue. 45 Wed. 74 Sat. 105 Mon. 135 Thu. 166 Sat. 196 Tue. 227 Fri. 258 Sun. 288 Wed. 319 Fri. 349 Fri. 167 Sun. 197 Wed. 228 Sat. 259 Mon. 289 Thu. 320 Sat. 350 15 Sun. 15 Wed. 46 Thu. 75 Sun. 106 Tue. 136 16 Mon. 16 Thu. 47 Fri. 76 Mon. 107 Wed. 137 Sat. 168 Mon. 198 Thu. 229 Sun. 260 Tue. 290 Fri. 321 Sun. 351 17 Tue. 17 Fri. 48 Sat. 77 Tue. 108 Thu. 138 Sun. 169 Tue. 199 Fri. 230 Mon. 261 Wed. 291 Sat. 322 Mon. 352 18 Wed. 18 Sat. 49 Sun. 78 Wed. 109 Fri. 139 Mon. 170 Wed. 200 Sat. 231 Tue. 262 Thu. 292 Sun. 323 Tue. 353 19 Thu. 19 Sun. 50 Mon. 79 Thu. 110 Sat. 140 Tue. 171 Thu. 201 Sun. 232 Wed. 263 Fri. 293 Mon. 324 Wed. 354 20 Fri. 20 Mon. 51 Tue. 80 Fri. 111 Sun. 141 Wed. 172 Fri. 202 Mon. 233 Thu. 264 Sat. 294 Tue. 325 Thu. 355 21 Sat. 21 Tue. 52 Wed. 81 Sat. 112 Mon. 142 Thu. 173 Sat. 203 Tue. 234 Fri. 265 Sun. 295 Wed. 326 Fri. 356 22 Sun. 22 Wed. 53 Thu. 82 Sun. 113 Tue. 143 Fri. 174 Sun. 204 Wed. 235 Sat. 266 Mon. 296 Thu. 327 Sat. 357 BAA Handbook 2012 BAA 23 Mon. 23 Thu. 54 Fri. 83 Mon. 114 Wed. 144 Sat. 175 Mon. 205 Thu. 236 Sun. 267 Tue. 297 Fri. 328 Sun. 358 24 Tue. 24 Fri. 55 Sat. 84 Tue. 115 Thu. 145 Sun. 176 Tue. 206 Fri. 237 Mon. 268 Wed. 298 Sat. 329 Mon. 359 25 Wed. 25 Sat. 56 Sun. 85 Wed. 116 Fri. 146 Mon. 177 Wed. 207 Sat. 238 Tue. 269 Thu. 299 Sun. 330 Tue. 360 26 Thu. 26 Sun. 57 Mon. 86 Thu. 117 Sat. 147 Tue. 178 Thu. 208 Sun. 239 Wed. 270 Fri. 300 Mon. 331 Wed. 361 27 Fri. 27 Mon. 58 Tue. 87 Fri. 118 Sun. 148 Wed. 179 Fri. 209 Mon. 240 Thu. 271 Sat. 301 Tue. 332 Thu. 362 28 Sat. 28 Tue. 59 Wed. 88 Sat. 119 Mon. 149 Thu. 180 Sat. 210 Tue. 241 Fri. 272 Sun. 302 Wed. 333 Fri. 363 29 Sun. 29 Wed. 60 Thu. 89 Sun. 120 Tue. 150 Fri. 181 Sun. 211 Wed. 242 Sat. 273 Mon. 303 Thu. 334 Sat. 364 30 Mon. 30 Fri. 90 Mon. 121 Wed. 151 Sat. 182 Mon. 212 Thu. 243 Sun. 274 Tue. 304 Fri. 335 Sun. 365 31 Tue. 31 Sat. 91 Thu. 152 Tue. 213 Fri. 244 Wed. 305 Mon. 366 PREFACE The Handbook has settled down into a fairly standard format and remains similar to that of 2011. In previous years my work as Director was greatly eased with the help of the Editor, Valerie White, whose death was a great loss. As we could not find a new editor in time, this Handbook has been edited by me in addition to my other tasks. I am particularly grateful to Andrew White who has once again typeset, proofread and assembled the manuscript for the printers, making this issue even more professional looking than before. I am also grateful to all the proofreaders, for checking their parts of the manuscript before printing. The Computing Section website now has a great many new and useful additions to help observers, and full details can be found on the outside back cover. As before it also contains the following constant and unchanging information: Bright Galaxies; Sun, Moon and Planets - Physical Data; Planetary Satellites - Physical and Orbital Data; Radio Time Signals; Conversion Formulae; Telescope Data; Astronomical and Physical Constants; and Miscellaneous Data. For those without access, printed copies are available from the BAA Office. Andrew Sinclair provided all the tables and diagrams for Saturn’s satellites, the two diagrams for the rising and setting of planets, and the diagram of the appearance of the planets. Lunar occultation and graze predictions were previously generated by Andrew Elliott, however following his untimely death these are now done by Tim Haymes and Dr Eberhard Riedel of the International Occultation Timing Association (IOTA/ES). Lunar libration data is from Ken Hall. Barry Leggett prepared the table of the satellites of Jupiter from data supplied by William Thuillot of the Institut de Mécanique Céleste et de Calcul des Ephémérides, who also supplied the diagrams of Jupiter’s satellites. Similar diagrams for the satellites of Saturn, Uranus and Neptune, are not included but can be readily obtained from other sources e.g. WinJupos software, which can be freely downloaded from the internet. In addition, the revised Computing Section website has an applet showing the positions of the main satellites of Saturn. In future, if there is a demand, it may be possible to include similar applets for the satellites of Uranus and Neptune. Solar and lunar eclipse maps and diagrams were provided by Fred Espenak, previously of the NASA/ Goddard Space Flight Center who also provided the Venus Transit world map. Xavier Jubier provided the Geocentric view of the Venus Transit. Richard Miles provided the data on minor planets and dwarf planets. Jonathan Shanklin contributed the comet data and John Mason prepared the Meteor Diary. Des Loughney prepared the information on eclipsing binaries. The information for variable stars was provided by John Toone. John Isles contributed the data on Mira and double stars. Tony Evans provided the ephemerides for Mercury, Venus and Mars and the data for Mars’ central meridian. Graham Relf (the Computing Section webmaster) produced the path diagrams for Uranus and Neptune which have been revamped to produce more detail. Gordon Taylor has also stepped back into his previous role and provided much of the data that I had taken over for the 2011 issue, for this I.
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