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epoch Prime
01-05-2018, 07:42 PM
Post: #5
RE: epoch Prime
(01-05-2018 07:30 PM)Dieter Wrote:  ... Simply calculate the Julian day number for two dates and you're done.

...

Dieter

Something like the formula used in my Astrolabio (Effemeridi), after Astrolab by Marcel Pelletier, maybe...
Code:

EXPORT julianDay(lista)
// lista like dateshortlist
BEGIN
  LOCAL y,m,d,a,b, JD;
  y:=lista(1);
  m:=lista(2);
  d:=lista(3);
  IF (m=1 OR m=2) THEN
  y:=y-1;
  m:=m+12
  END;
  IF y*100+m+d>=158225 THEN
  a:=IP(ABS(y/100));
  b:=2-a+IP(a/4);
  ELSE
  b:=0
  END;
  JD:=IP(365.25*(y+4716))+IP(30.6001*(m+1))+d+b-1524.5;
  RETURN JD;
END;

where "lista" is based on
Code:

dateshortlist:= MAKELIST(X,X,1,3);
and so on...

Salvo

∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C - DM42, DM41X - WP34s Prime Soft. Lib
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Messages In This Thread
epoch Prime - salvomic - 01-05-2018, 05:00 PM
RE: epoch Prime - pier4r - 01-05-2018, 06:03 PM
RE: epoch Prime - Dieter - 01-05-2018, 07:30 PM
RE: epoch Prime - salvomic - 01-05-2018 07:42 PM
RE: epoch Prime - Dieter - 01-05-2018, 07:51 PM
RE: epoch Prime - salvomic - 01-05-2018, 08:07 PM
RE: epoch Prime - Dieter - 01-05-2018, 08:47 PM
RE: epoch Prime - salvomic - 01-05-2018, 09:10 PM
RE: epoch Prime - Dieter - 01-05-2018, 09:27 PM
RE: epoch Prime - salvomic - 01-05-2018, 09:36 PM
RE: epoch Prime - Dieter - 01-05-2018, 10:07 PM
RE: epoch Prime - salvomic - 01-05-2018, 10:16 PM
RE: epoch Prime - Dieter - 01-05-2018, 10:48 PM
RE: epoch Prime - pier4r - 01-05-2018, 09:40 PM
RE: epoch Prime - salvomic - 01-05-2018, 09:44 PM
RE: epoch Prime - Dieter - 01-05-2018, 09:56 PM
RE: epoch Prime - salvomic - 01-05-2018, 06:17 PM
RE: epoch Prime - salvomic - 01-05-2018, 11:26 PM
RE: epoch Prime - Dieter - 01-06-2018, 08:53 AM
RE: epoch Prime - salvomic - 01-06-2018, 09:28 AM
RE: epoch Prime - Dieter - 01-06-2018, 09:41 AM
RE: epoch Prime - Didier Lachieze - 01-06-2018, 09:50 AM
RE: epoch Prime - StephenG1CMZ - 01-06-2018, 09:40 AM
RE: epoch Prime - pier4r - 01-06-2018, 10:46 AM
RE: epoch Prime - Dieter - 01-06-2018, 12:42 PM
RE: epoch Prime - salvomic - 01-06-2018, 01:07 PM
RE: epoch Prime - salvomic - 01-06-2018, 02:45 PM
RE: epoch Prime - Dieter - 01-06-2018, 06:26 PM
RE: epoch Prime - StephenG1CMZ - 01-06-2018, 08:26 PM
RE: epoch Prime - Dieter - 01-06-2018, 08:37 PM
RE: epoch Prime - pier4r - 01-06-2018, 09:59 PM
RE: epoch Prime - salvomic - 01-06-2018, 10:07 PM
RE: epoch Prime - pier4r - 01-06-2018, 10:55 PM
RE: epoch Prime - pier4r - 01-06-2018, 03:28 PM
RE: epoch Prime - salvomic - 01-06-2018, 03:45 PM
RE: epoch Prime - salvomic - 01-06-2018, 04:10 PM
RE: epoch Prime - StephenG1CMZ - 01-06-2018, 06:54 PM
RE: epoch Prime - salvomic - 01-06-2018, 07:58 PM
RE: epoch Prime - salvomic - 01-06-2018, 08:45 PM
RE: epoch Prime - Dieter - 01-06-2018, 08:59 PM
RE: epoch Prime - salvomic - 01-06-2018, 09:01 PM
RE: epoch Prime - Dieter - 01-06-2018, 11:07 PM
RE: epoch Prime - StephenG1CMZ - 01-06-2018, 11:24 PM
RE: epoch Prime - salvomic - 01-07-2018, 09:26 AM
RE: epoch Prime - Dieter - 01-07-2018, 06:22 PM
RE: epoch Prime - salvomic - 01-07-2018, 06:28 PM



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