# Coscott comments on Harry Potter and the Methods of Rationality discussion thread, March 2015, chapter 119 - Less Wrong

4 10 March 2015 06:10PM

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Comment author: 10 March 2015 11:18:36PM *  -1 points [-]

Another close figure: The sidereal day is 3 minutes, 56 seconds shorter than the solar day. If the solar day has a negative leap second, the difference is 3'55".

Comment author: 11 March 2015 01:49:11AM 0 points [-]

I do not know what some terms mean, but I think that is not another close figure, that is the same figure.

Comment author: 11 March 2015 03:45:48AM -1 points [-]

I mean, close to 3'54".

Comment author: 11 March 2015 04:21:21AM 0 points [-]

If the sidereal day and the solar day mean what I am guessing they mean, your 3:55 and Lumifer's 3:55 come from the same place.

Comment author: 11 March 2015 05:02:31AM *  -1 points [-]

No, what he did was divide the sidereal day by 366,24 and got 235 seconds, so there would be as many Stone's periods in a day as there are days in a year.

Comment author: 11 March 2015 03:26:46PM 1 point [-]

Yes, and my claim is that that is what you did too without knowing it. Think about what sidereal and solar day mean, and how you would calculate one from the other.