Disk Set 20: dates and times

[Stupendous Man <richmond@a188-l009.rit.edu>]

  Mike G. asked:

>  I don't have access to
>  disk 20 or 19 here.  Can someone run the same calculations using the data
>  out of a header file in one of those files?

  Just one example: image file hvra2239818.fits has in its header

> DATE-OBS= '2001-11-27T07:38:36' / UT date-time of exposure start
> UTSTART = '07:38:36'           / Universal time of #1 exposure (I) start

The Julian Date corresponding to this time is 2,452,240.818.  Note
that the file name has "2239818" instead of the expected "2240818".
So that particular file (which comes from Disk 7 or 8) has a file
name which is off by one day.

                                   Michael Richmond