Re: Question about caldate_mjd()
John Peacock <[email protected]> Mon, 15 Sep 2003 09:41:53 -0400
| Newsgroups | gmane.comp.lib.libtai |
|---|---|
| Organization | Rowman & Littlefield Publishing Group |
| Message-ID | <[email protected]> |
Bart Grantham wrote: > Ooops .. let me restate that... Something, 111AD? (1859 years before > 1970 if I calculate right) My confustion stems from this line: > > d = cd->day - 678882L; > mjd = Modified Julian Date http://www.faqs.org/faqs/astronomy/faq/part3/section-6.html I cannot locate anything to explain where that constant comes from, though... HTH John -- John Peacock Director of Information Research and Technology Rowman & Littlefield Publishing Group 4501 Forbes Boulevard Suite H Lanham, MD 20706 301-459-3366 x.5010 fax 301-429-5748