How do I divide hours by ten seconds?

Question

I'm working on a birth chart for my own astrological curiousities, but that's not really important. What is, is that I've been asked to divide my GMT birth time by 10 seconds, to make up for the difference between the 24-hour day and the sidereal day. You don't really have to know what those mean... the point is, how do I divide the time 13:19 by ten seconds?

Oh no wait.... MULTIPLY 13:19 by ten seconds... great...

Answer 1

OK: 60 seconds in one minute, therefore 13 x 60 = 780 seconds.
780 + 19 = 797 seconds or 13 minutes 19 seconds
797 / 10 = 79.7, correct?

OR did you mean 13 hours and 19 minutes???
13 hours x 3600 seconds per hour = 46800 seconds
19 minutes x 60 seconds per minute = 1140 seconds
46800 + 1140 = 47940 seconds
47940 / 10 = 4794

Answer 2

I don't see how dividing by 10 seconds is going to convert the 24 hour day to the sidereal day and I do know that the difference is in the 10 second range. Anyway, to solve your problem what you have to do is convert the time of your birth to the number of seconds after midnight which you can then divide by 10. To do this you need to know there are 60 seconds in a minute, 60 minutes in an hour and that you were born at 13 hours and 19 minutes after midnight. 13 x 60 x 60 for the hours and 19 x 60 for the minutes.

Recheck the instructions, however, because At what point do the sidereal and 24 hour days match up.

Answer 3

I think you mean "reduce by 10 seconds per hour"
not divide by 10 seconds.

If the sidereal day is 23 h 56 m 4.1 seconds
and the GMT system is 24 h, then
the sidereal day is shorter by 236 seconds.

Are you trying to evenly subtract the 236 seconds over the 24 hours in a GMT day, making each hour shorter by 9.8 seconds in comparison? This would be applying the 24:00 system to a sidereal day, which would seem the opposite of taking the sidereal system of measurement and applying to a 24 hour time period in which you were born at 13:19.

But if that is what you are doing, then 13 hours would mean subtracting 130 seconds; and 19/60 min. or about 1/3 of an a hour would mean subtracting about 3 seconds (1/3 x 9.8). If this is right, my guess is to subtract about 133 seconds.

But I don't think this is what you want.

Technically, to get the date and time right, you would have to start at the beginning of both calendars, and recalculate all the days from then to your birth to translate completely into sidereal days, hours, minutes and seconds.

I don't think you can just take one day out of context and compare it to another day length. Are you sure this is right?