Ascendant corresponds with S.T. 14h 6m. The difference is 4h 32m before noon, or 7h 28m
local civil or mean time - which varies by only a few minutes from the sunrise time given in
the almanac. This local mean time should be further corrected to Standard Time by 4m per
degree to the nearest Standard meridian. The rising time of any planet can be determined by
the same method. v. Table of Houses.
The following formula can also be employed:
From Ephemeris take:
...(1) Sidereal Time on MC at Midnight of desired day.
...(2) Add or subtract 12 = ST at Noon.
...(3) Degree occupied by Sun on the same day.
From Table of Houses for desired Latitude, locate in Ascendant
column the degree occupied by the Sun, and take from the first
column (4) the equivalent ST.
Then: (4) - (1) = the arc from Noon to Sunrise, stated in
hours;
..................hence the approximate time of Sunrise;
......(2) - (4) = approximate hour of Sunset.
Example: For Dec. 17, 1946 at Lat. 40° N
...(1) ST at Midnight, 5h 40m + 12 = (2) ST at Noon, 17h 40m
...(3) Long. 24°26'
...(4) Equivalent S.T. 13h 2m
.........Sunrise..............Sunset