Is this a valid method for determining the angle of the moon at a given time and place?

Question

Moon On April 11th 1979, longitude 86oW 12h58pm

1 angle from greenwich at 0h
april 11th, midnight 02LI41
april 12th, midnight 15LI05

A - Get the difference between these two days
(15-2)o + (5-41)'' = 13o - 36''
= 12o24
= 12o + 24'' *1o/60''
= 12.4o

B - Get the offset at 12h58
12h58 = 12h + 58min * 1h/60min
= 12.96h
12.96h * 12.4o / 24h = 6.696o --> difference added to value at midnight
War time not in effect.

C - Add the offset to basic value of the day
Libra's spawn is between 270o and 300o
And starts at 270o
2Li41 = 270o + 2o41
= 272o41
272o + 41'' * 1o/60'' = 272.683o
+ 6.696
= 279.379o

2. adjustment for longitude
+86o --> earth spins from east to west
would be -86o if the longitude was 86o East
= 365.379o

3 adjustment of moon's position during that offset of time
365.379o * 1 lunar cycle / 27.32 terrestral cycles = 13,374048316251830161054172767204o
365.379o + 13.374o = 378.753o

4. Delay of light from moon to earth
1.2 seconds approx.
1.2s * 1h/3600s = 0.0002777....h
0.00027h * 15o/h on earth = 0.004166...o
378.753o + 0.004o = 378.757o
Nearly negligible

5 angle translated to sign
378.753o > 360o
Therefore the cycle is completed once
378.757o - 1cycle * 360o/cycle = 18.757o

6 Spawn of capricorn 0o to 30o

Hence 18.753o means 18.757o capricorn
Or
18o + 0.757'' * 1o/60'' = 18o45 capricorn

The Moon hits earth with a 18CP45 angle type
at longitude 86o, 12h58pm

Minou: It is to get a relative angle instead of a constellation.

Answer 1

It's a lot cheaper and easier just to buy an ephemeris. Raphael's is good, Rosicrucian is also good. Or you can check our Nasa's website. I'm just curious why you would need all the calculations. There are lots of web sites that will give you the exact phase of the moon on any given day.
As a general rule, the moon will move 1 degree every 2 hours. Sometimes it moves faster, sometimes it moves a tad slower. But you can get all that in an ephemeris.
Or you could post this in the astronomy section. They just love scientific calculations.

Answer 2

Ever heard of putting her in a 45 degree angle and shooting her to the moon? That's how you determine the correct angle of the moon. Bend her over and shoot for the wet spot. lol