July 7, 2010
6:41 a.m.
Yes, delta-T is very important in all astronomical calculations Clive D.W. Feather wrote:
David Patte said:
Though its true that no one was wondering about daylight saving and zone offsets 10000 years ago, the dates we compute for 10000 years ago, give users a 'feel' for the time of an event that happened that long ago. Most people don't know the difference between apparent time and mean time, but saying that an event likely happend near 6PM EST June 1st 8000BC is something that most people can relate to.
Except that, that far back, leap seconds probably make a significant difference as well.
That far back, the required correction (i.e. TAI - UT1) is about 86 hours (that is, 3.5 days).