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Observer's Handbook 1973 the OBSERVER’S HANDBOOK 1973 sixty-fifth year of publication the ROYAL ASTRONOMICAL SOCIETY of CANADA THE ROYAL ASTRONOMICAL SOCIETY OF CANADA Incorporated 1890 - Royal Charter 1903 Federally Incorporated 1968 The National Office of the Society is located at 252 College Street, Toronto 130, Ontario; the business office, reading room and astronomical library are housed here. Membership is open to anyone interested in astronomy and applicants may affiliate with one of the eighteen Centres across Canada established in St. John’s, Halifax, Quebec, Montreal, Ottawa, Kingston, Hamilton, Niagara Falls, London, Windsor, Winnipeg, Saskatoon, Edmonton, Calgary, Vancouver, Victoria and Toronto, or join the National Society direct. Publications of the Society are free to members, and include the J o u r n a l (6 issues per year) and the O b s e r v e r ’s H a n d b o o k (published annually in November). Annual fees of $10.00 ($5.00 for full-time students) are payable October 1 and include the publications for the following calendar year. VISITING HOURS AT SOME CANADIAN OBSERVATORIES David Dunlap Observatory, Richmond Hill, Ontario. Wednesday mornings throughout the year, 10:00 a.m. Saturday evenings, April through October (by reservations, tel. 884-2112). Dominion Astrophysical Observatory, Victoria, B.C. May-August: Daily, 9:15 a.m.-4:30 p.m. (Guide, Monday to Friday). Sept-April: Monday to Friday, 9:15 a.m.-4:30 p.m. Public Observing: Saturday evenings, April-November. Dominion Observatory, Ottawa, Ontario, K1A-0E4. Monday-Friday, daytime, rotunda only. Saturday evenings, April through October. Week nights, school classes (by reservation). Dominion Radio Astrophysical Observatory, Penticton, B.C. Sunday, July and August only (2:00-5:00 p.m.). Planetariums The Calgary Centennial Planetarium, Mewata Park, Calgary 2, Alberta. Winter: Wed.-Fri., 7:15 and 8:45 p.m.; Sat. and Sun., 3:00, 7:15, 8:45 p.m. Closed Christmas day, New Year’s day, and Good Friday. Summer: Daily (except Tues.) 1:45, 3:00,4:15, 7:15 and 8:45 p.m. Current program information: tel. 264-4060. Dow Planetarium, 1000 St. Jacques St. W., Montreal, P.Q. In English: Tues. through Fri. 12:15 p.m.; Sat. 1:00 and 3:30 p.m.; Sun 2:15 p.m. Evenings (except Mon.) 8:15 p.m. In French: Tues. through Sat. 2:15 p.m., also Sat. 4:30 p.m ; Sun 1:00, 3:30, and 4:30 p.m. Evenings (except Mon.) 9:30 p.m. H. R. MacMillan Planetarium, 1100 Chestnut St., Vancouver 9, B.C. Sept-June: Tues.-Thurs., 4:00 and 8:00 p.m., Fri. 4:00, 7:30, 9:00 p.m. Sat. and holidays, 1:00, 2:30, 4:00, 7:30, 9:00 p.m. Sun., 1:00, 2:30,4:00,7:30 p.m. July-August: Tues.-Sat., 1:00, 2:30, 4:00, 7:30, 9:00 p.m. Sun., 1:00, 2:30, 4:00, 7:30 p.m. (including Christmas and Easter weeks). Closed on Mondays except holidays. Manitoba Museum of Man & Nature Planetarium, 190 Rupert Ave., Winnipeg 2, Man. S ept-June: Sun., 1:00, 2:30, 4:00 p.m.; Tues.-Fri., 3:15, 8:30 p.m. Sat. and holidays, 1:00, 2:30, 4:00, 7:30, 9:00 p.m. July-August: Sat., Sun., and holidays, same as above; Mon., 3:30 p.m. Tues.-Fri., 11:30 a.m., 3:30, 7:30, 9:00 p.m. Open all holidays except Christmas and Good Friday. McLaughlin Planetarium. 100 Queen’s Park, Toronto 5, Ontario. Tues.-Fri., 3:00, 8:00 p.m.; Sat., 2:00, 3:30, 7:30, 9:00 p.m. Sun., 2:00, 3:30, 5:00, 7:30 p.m. (During July and August weekday shows at 2:00, 3:30, and 8:00 p.m.) McMaster University, School of Adult Education, GH-136, Hamilton, Ontario. Group reservations only. Queen Elizabeth Planetarium, Edmonton, Alberta. Winter: Tues.-Fri., 8:00 p.m., Sat., 3:30 p.m., Sun., 3:00 and 8:00 p.m. Summer: Mon.-Sat., 3:00, 8:00 p.m., Sun. and holidays, 2:00, 4:00, and 8:00 p.m. The University of Manitoba Planetarium, 394 University College, 500 Dysart Rd., Winnipeg 19, Man. Wed. and Fri., 12:40 and 8:00 p.m. the OBSERVER’S HANDBOOK 1973 sixty-fifth year of publication the ROYAL ASTRONOMICAL SOCIETY of CANADA 252 College Street, Toronto 130, Canada editor: JOHN R. PERCY INDEX PAGE Anniversaries and F estivals ..............................................................................................3 Asteroids—Ephemerides at Opposition......................................................................... 70 C lu ste rs.................................................................................................................................96 C o n stellatio n s.......................................................................................................................5 E clipses.................................................................................................................................57 Galaxies ....................................................... 100 Julian Day C alendar.......................................................................................................... 3 Jupiter—Belts and Zones ............................................................................................71 —Longitude of Central M erid ian ...................................................................72 —Phenomena of S atellites ............................................................................... 73 Mars—Longitude of Central M eridian .........................................................................70 Messier’s C atalogue ........................................................................................................95 Meteors, Fireballs and M eteorites ............................................................................... 75 Miscellaneous Astronomical D a t a ................................................................................. 6 Moon—Observation ........................................................................................................58 —M a p .................................................................................................................... 69 Moonrise and Moons e t ..................................................................................................20 Nebulae—G alactic ........................................................................................................98 Occultations—L u n a r ................................................................... 59 —G r a z i n g ..................................................................................................65 —Planetary, A ppulses ............................................................................... 69 Planets—G eneral..............................................................................................................26 —E lem ents................................................................................................................ 8 Precession for 50 Y e a rs ..................................................................................................77 Radio Sources.................................................................................................................... 99 Satellites of Solar System ....................................................................................................9 Saturn—Satellites.............................................................................................................. 76 Sky and Astronomical Phenomena Month by M o n th .......................................... 32 Solar System—Elem ents ....................................................................................................8 —List of S a te llite s....................................................................................... 9 Star M a p s .........................................................................................................................102 Stars—B rightest .............................................................................................................. 79 —Double and M ultiple ........................................................................................... 94 —Names, Finding L is t ............................................................................................78 —N e a re st.................................................................................................................... 90 —V a r i a b l e .............................................................................................................. 92 Sun—Ephem eris ................................................................................................................ 7 —Physical Observations............................................................................................56 —Sun-spot C ycle ........................................................................................................26 Sunrise and S u n se t ........................................................................................................ 13 Symbols and A b b re v ia tio n s..............................................................................................4 Time—Correction to S u n -d ial ........................................................................................7 —Radio Time S ignals ............................................................................................11 —Solar, Sidereal, Universal, Standard, Ephemeris . .... 10 —Map of Time Z o n es ............................................................................... facing 12 T w ilight.................................................................................................................................19 PRINTED IN CANADA BY THE UNIVERSITY OF TORONTO PRESS th e obser ver’s h a n d b o
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