1{22KKRDATRTITLEKSETOFFCURSEOFCUDDUMMPPD18PERPERILASCNODPERIOSEMAXIECCEINCLDYVFFPRTRUUQQQQQELMYBHIJJNDDRKHMMDAHMIAMIILALTSCCSJTTUERERRCHSEZT@@A @@ @  !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefg ****************** HALLEY HUNTER ** BY *(* HARRY HAMMOND *2*****************<Fh6-@6-@=;,;@,9,;@,T6.٠Ҡ^ A1h+@P_-@6(AAD%;-O:&@,_-P:H:,$@,P:H:,$@#,%Z$(@.  6-##$ d?A@S#-@)-?(@7<,nK2@@'-@@+ / 92G-AK xf-@!-(@analog computing;-APA F:B7p,T fA @}-@@*(@LOADING<-@@ W(@ CHARACTER SETi-@@(@ _&;@1,;@,;@u,4-@18"D67,.>:,H Q6-C:,_-@K"67,.>:,  6-C:,.-@u2">67,.>:,B K6-C:,OAA4++AY=A A7OAAD6-F:@,!A',6-&A(8@DB7tr%6-F:A`,%AV$F:Aa,@%@F:%@,%X-%@%@(d@h r A203@K:,F:Ad,AU3)(>:A%,HALLEY EPHEMERIS6-@6-'A6-A6-Ap6-@XS6-@v6-@5"6-?rg,6-Ab#6( HALLEY HUNTER(@$$( an atari owner's guideJ&&( to the 1985-86 apparitionT%"( of HALLEY'S COMET%(h( byr( HARRY HAMMOND((6-?:<, A  A0A(>:A%,(>(&crunching numbers for r;a; and dec;;;;A( 6-6-A%A6-A A6-AA6- A6- A@ 6-6-+A`',$+'Ae%, 6- Ap 6-$ 6-& 6-06-&$G:,&:O:,=AD6-'+&$E:,,N 6-&X A`b&&6-M:+%,'+&,,$+G:','E:',,l6-$D:,v6-$A' 6-%6-$+&$,'+%$E:,, 6-& 6- 6-$ 6-$6-G:,$G:,6-D:'M:6$%,,6-D:+G:,'E:,,$E:,,6-$A'%'@*Ap'6-%A  6-%A` 6-$6-$E:, 6-Au 6-Ar   6-Av* 6-4  6-> A@H%%6-+A`'Ae%,$+'@@,R 6-\ Apf 6-p 6-$z6-?g $$6-%+A`',$$G:&?C,6-%@SC!A`6-&A`  6-%A`6-+&AQ@,$6-+&$,'+%$E:,,6-+&,$6-+&,$ A@6-$G:,6-'+&$E:,, 6-D:,6-$A'% A6-$G:,6-'+&+$E:,,,$ 6-D:,.6-$A'%%A8!A`6-&A`B  6-%A`L 6-$V6-$+G:,'E:,,$G:&,`6-'+$G:,,j 6-D:,t6-?@0d~6-G:,$E:,6-%E:,$G:,$G:,6-D:'M:6$%,,6-$A'6-+G:,'E:,,$E:,!!6-&++G:,'E:,,$G:,,'E:, 6-D:,6-$A'6-P:'@,6-P:'@,%&"@)&"%6-%A`%&")&"@%6-%A &"6@ 6-%A` &"66-&A 6-'@6-$%$6-&$$$E:,( 6-M:,26-'E:,< 6-F A`P 6-6-Z6-'@d A`n6-$@x6-@6-@!  6-@!6-@D6-%@$?CC$K:, 6-%$@P$?CC$K:,6-P:@$,'@9-@9(%0;k;;;now for altitude and azimuth;;; A$0SCREEN OUTPUT(>:A%,6-?:,,)(!HALLEY'S COMET for date indicated,(88(date: //  hrs;  min;--(%days before(-) or after(+) perihelion+(((closest approach to sun): P:,+(--(%coordinates**************************EE(right ascension: P:A$%?P,'A hours"GG(declination: P:$A%?P,'A degrees,KK(: P:@$+',%?P,'@ degrees6NK(: P:@$+',%?P,'@ degreesN(J--(%distances****************************T,,(comet to sun:  a;u;^( (approx; P:@$,h( million mi;)(r,,(comet to earth:  a;u;|( (approx; P:@$,( million mi;)(##(predicted magnitude**** --(%^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^NC(;PRESS 'CTRL-P' FOR PRINTOUT, ANY OTHER KEY FOR ANOTHER DATEN6-?:<,* )"@ A3* A A6-+&,'@6-P:%,6-Ae$+&%,%P:,A!+"* @),)"!6-&!A0 6-&6-@1$ AP& 6-%06-P:@0`$,&@c:6-%%&Ae$D$N AX!A`A b6-%A`l  $v A6-&A`A`$ A 6-$A6-P:%?P,6-'A$VALID DATE SUBROUTINE,( ( (,( enter a valid date:$-@@$( (mo/dy/yr)6-@6-@ A!INPUT DATE -@@( $*ENTER VALID DATE4 ->(xx-xx-xxH -(>:AS,R A#0MONTH\ 6-A:,f )!@A!p67<,.67@,./z(>:@1, A#0DAY 6-A:, A!"*!@)A!AA+"@)"@)"@ )"@,*!@0A!!@1A! 6-+67@<@,.+67@,./(>:@1, A#0YEAR 6-A:, )!@A!67@<@,. AdAU$ INPUT TWO DIGITS -$  )68,-. BACKSPACE MEANS RESTART8 "A&' A!B IGNORE NONDIGIT ENTRIESL !! @H)!@WA#@V  (>:,ECHO INPUT`  j 6.>:8,,67,.>:8,,t $~ ALTITUDE AND AZIMUTH 6-@e6-'A  A&6-$@$ 6- 6-$@$ 6- 6-$ 6($(input latitude, longitude*06-66-  6-$6-$  6-&%LHA 6-G:,$G:, 6-%E:,$E:,$E:, 6-&$  !6-M:, A% 6-D:', A& 6-N:,$'( 6-E:,$G:,2 6-&G:,$E:,$E:,< 6-6E:,$G:,F  "6-N:,$'P "A&pZ 6-D:',d   6-%n   6-%%x $ ""GREENWICH MEAN SIDEREAL TIME FROM JULIAN DATE A( 6-&CEE 6-'Be%6-P:, 6-$Be%%CEE 6-+&%?P,'Be% 6-BAT%A(f$ 6-%Cd$ 6-%? 1$$ 6-&= $$$ 6-'Bd6-&P:, ''6-@$$+%+&?P,$@'7,   6-%@$ !@$6-&@$ $"  6-P:,6-@`$+&,,  6-P:,6-@`$+&,6 H=HRS, M=MIN., S=SEC. GMST@ GREGORIAN INPUT FOR HALLEYJ  6-P:,6-&&?PT 666-6P:@$+P:+%@ ,'@,%,'@,^ %6-N:&@ ,%6-O:&@ ,h 6-P:%%P:'@,,r $$6-6P:+P:'A,%,$?u,| ""6-%P:Au$'@ ,%% 6-%Cr)%Ag$ A)  6-%6-& 44J IS INT(JULIAN DAY NO.), F IS FRACTIONAL PART $ FIND UT Y-@!-(time to observe (hr,min)3C!@$) O-@!Y A0 C(>:A%,(<(#is that daylight savings time (y/n)C) 1-@.(what time zone are you in?1( !!( (1) eastern (2) central ""( (3) mountain (4) pacific ( (5) other 8((select:)8 @I)!@SA00 -@(  '6-&@D"@ ' A1P "@6-&& - 6-%@$%6-&@$-6-%0   6-@$%6-&: 6-%'@$%'A@D $N j( (j(\what is the hour difference between your time zone and greenwich (west is +, east is -)X b $l ERROR HANDLERv R6-F:A,46-F:A,%AV$F:A,R"@)"@A2  V++(UH-OH! ERROR # HAPPENED...I(CHECK IT OUT AND RERUN...NSV (>:AS, A1  LOAD CHARACTER SET $$6-+F:A,&@,$AV %-@I"%6-%$@ ;-@"%)!@;%&A% "  AV'AV"$ OUTPUT TO PRINTER !@P:(!( ))( DATA FOR HALLEY'S COMET 50(%^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^5( (Latitude & Longitude: +(O:, !( S + A3p ( N * ((O:, ( W( A34 ( E> @(@(Date: //  hrs.  min.H 00(%Days before(-) or after(+) perihelionR 4/((closest approach to the sun): P:,4(f 22('Coordinates----------------------------p GG(Right ascention: P:A$%?P,'A hoursz II(Declination: P:$A%?P,'A degrees MM(ALTITUDE: P:@$+',%?P,'@ degrees MM(AZIMUTH: P:@$+',%?P,'@ degrees 22('DISTANCES------------------------------ ..(Comet to sun:  a.u. 33( (approx. P:@$, million miles) ..(Comet to earth:  a.u. 83( (approx. P:@$, million miles)8( @$(Predicted magnitude----)(.(3(8(=@$mm104,169,0,141,7,212,169,4,141,111,2,104,170,104,168,169,7,32,92,228,169,58,141,47,2,169,2,141,29,208,96BB104,169,0,141,2,208,141,240,2,169,7,160,98,162,228,76,92,228WW216,169,1,141,240,2,169,58,141,47,2,169,0,170,157,0,6,202,208,250,165,85,10,10,24XX105,48,141,2,208,165,84,10,10,10,24,105,1,105,31,168,162,8,169,240,153,0,6,200,202SS208,247,230,0,165,0,74,74,74,41,1,208,4,165,1,208,2,165,2,141,194,2,76,98,228X0,0,0,0,0,0,0,0,07,16,16,0,0,0,0,0,08,16,64,64,64,64,64,64,169,64,16,16,16,16,16,16,6410,0,85,85,0,85,85,0,011,0,32,32,32,168,32,32,012,0,0,0,0,0,32,32,12813,0,0,0,168,0,0,0,014,0,0,0,0,0,32,32,015,0,4,4,16,16,64,64,0,16!!0,168,136,136,136,136,168,0 17,0,160,32,32,32,32,168,0!!18,0,168,8,40,160,128,168,0 19,0,168,8,168,8,8,168,0 20,0,8,40,136,168,8,8,0,21 0,168,128,168,8,136,168,0*""22,0,168,128,168,136,136,1684""0,23,0,168,8,32,32,128,128,0>""24,0,168,136,168,136,136,168H 0,25,0,168,136,168,8,8,8,0R26,0,0,16,0,0,16,0,0\27,0,0,0,0,0,16,16,031,0,84,68,4,20,0,16,097,0,16,84,68,68,84,68,0"98,0,80,68,80,68,68,80,0,99,0,16,68,64,64,68,16,06100,0,80,68,68,68,68,80,0@101,0,84,64,84,64,64,84,0J102,0,84,64,84,64,64,64,0T103,0,20,64,64,68,68,84,0^104,0,68,68,84,68,68,68,0h105,0,84,16,16,16,16,84,0r106,0,4,4,4,4,68,20,0|107,0,68,68,68,80,68,68,0108,0,64,64,64,64,64,84,0109,0,68,84,84,68,68,68,0110,0,68,68,84,84,68,68,0111,0,16,68,68,68,68,16,0112,0,80,68,68,80,64,64,0113,0,16,68,68,68,68,16,4114,0,80,68,84,80,68,68,0115,0,84,64,84,4,4,84,0116,0,84,16,16,16,16,16,0117,0,68,68,68,68,68,84,0118,0,68,68,68,68,84,16,0119,0,68,68,68,84,84,68,0120,0,68,68,16,16,68,68,0 121,0,68,68,84,16,16,16,0 122,0,84,4,16,16,64,84,0 D2:HALYHUNT@H