Listed below are the computations for 2019 for
the expected dates of New Moon visibility from Israel. The
possible projected dates for the Appointed Times for 2019 are
given in a second table below the New Moons table.
PLEASE NOTE:
The "Date of Visibility" column dates are the dates on
which the New Moon is expected to be seen--beginning at sunset
of the listed day. All dates listed are to be reckoned
from sunset of listed day and date through the next
day at sunset in the following New Moon table.
|
New Moon |
Date of Visibility |
Sunset |
Moon Set |
Lag Time |
% of Illum. |
Moon Alt. |
Sun Alt. |
VN |
Sighted? |
|
11th |
Monday, January 7, 2019 | 4:51 |
6:07 |
76 min. |
2.19 % |
13.1 |
-15.3 |
166.8 |
Yes |
|
12th |
Wednesday, February 6, 2019 | 5:17 |
6:43 |
86 min. |
2.82 % |
15.6 |
-17.8 |
198.2 |
clouds |
| 13th/1st | Friday, March 8, 2019* | 5:42 |
7:20 |
98 min. |
3.82% |
19.0 |
-20.8 |
241.0 |
Yes |
|
1st/2nd |
Saturday, April 6, 2019* | 7:02 |
8:05 |
63 min. |
1.89% |
12.0 |
-13.2 |
144.7 |
1 witness* |
|
2nd/3rd |
Monday, May 6, 2019 |
7:22 |
8:55 |
93 min. |
3.50% |
17.4 |
-17.5 |
217.8 |
clouds/haze |
|
3rd/4th |
Tuesday, June 4, 2019 |
7:41 |
8:48 |
67 min. |
2.09% |
11.9 |
-12.0 |
146.3 |
clouds/haze |
|
4th/5th |
Thursday, July 4, 2019* | 7:48 |
9:29 |
101 min. |
5.06% |
18.8 |
-17.2 |
251.2 |
Yes |
|
5th/6th |
Friday, August 2, 2019 |
7:35 |
8:54 |
79 min. |
3.75% |
15.1 |
14.9 |
198.6 |
Yes
|
|
6th/7th |
Saturday, August 31, 2019 |
7:05 |
8:08 |
63 min. |
2.52% |
12.3 |
-13.0 |
155.0 |
Yes |
|
7th/8th |
Sunday, September 29, 2019* | 6:27 |
7:16 |
49 min. |
1.36% |
9.36 |
-10.6 |
111.8 |
Yes |
|
8th/9th |
Tuesday, October 29, 2019 |
4:43 |
6.07 |
84 min. |
3.09% |
13.3 |
-15.5 |
181.3 |
Yes
|
|
9th/10th |
Wednesday, November 27, 2019* | 4:35 |
5:27 |
52 min. |
1.23% |
8.60 |
-10.2 |
107.9 |
|
|
10th/11th |
Friday, December 27, 2019 |
4:42 |
5:54 |
72 min. |
2.13% |
11.8 |
-14.1 |
155.6 |
|
|
11th/12th |
Sunday, January 26, 2020 |
5:07 |
6:34 |
87 min. |
2.99% |
15.4 |
-17.9 |
200.9 |
|
|
12th/13th |
Tuesday, February 25, 2020* | 5:33 |
7:11 |
98 min. |
3.81% |
18.7 |
-20.8 |
239.9 |
|
| 1st |
Wednesday, March 25, 2020 |
5:54 |
6:52 |
58 min. |
1.63% |
11.0 |
-12.3 |
132.0 |
* Thursday, July 4, 2019 - The
moon may possibly be visible one evening earlier, but most
likely not. Here are the stats for that date: On Wednesday
evening (July 3), we expect a 7:41 pm sunset & 8:48 pm moon
set (therefore, a lag time of 67 minutes), a 1.14% of
illumination, with a lunar altitude at sunset of 7.83 degrees and
a solar altitude of -8.24 at moonset. VN = 94.72
* Sunday, September 29, 2019 - The
moon may not be visible until the next evening. Here are the stats
for the next evening: Monday evening, September 30, we
expect a 6:26 pm sunset & 7:55 pm moon set (therefore, a lag
time of 89 minutes), a 5.38% of illumination, with a lunar
altitude at sunset of 17.0 degrees and a solar altitude of -19.0.
VN = 248.6
|
Event |
begins sunset of |
ends sunset of |
|
Passover (Lord's Supper)* |
Thursday, March 21 |
Friday, March 22 |
|
Feast of Unleavens (1st day)* |
Friday, March 22 |
Saturday, March 23 |
| Elevation Sheaf Day (aka "wave sheaf") |
Saturday, March 23 |
Sunday, March 24 |
| Feast of Unleavens (7th day)* |
Thursday, March 28 |
Friday, March 29 |
| Pentecost |
Saturday, May 11 |
Sunday, May 12 |
| Day of Shouting (aka "Trumpets") |
Saturday, August 31 |
Sunday, September 1 |
| Day of Atonement |
Monday, September 9 |
Tuesday, September 10 |
| Feast of Tabernacles (1st day) |
Saturday, September 14 |
Sunday, September 15 |
| 8th Day Assembly |
Saturday, September 21 |
Sunday, September 22 |
* These Appointed
Times may all occur one day previous
|
Event |
begins sunset of |
ends sunset of |
|
Passover (Lord's Supper) |
Friday, April 19 |
Saturday, April 20 |
|
Feast of Unleavens (1st day) |
Saturday, April 20 |
Sunday, April 21 |
| Elevation Sheaf Day (aka "wave sheaf") |
Saturday, April 20 |
Sunday, April 21 |
| Feast of Unleavens (7th day) |
Friday, April 26 |
Saturday, April 27 |
| Pentecost |
Saturday, June 8 |
Sunday, June 9 |
| Day of Shouting (aka "Trumpets")* |
Sunday, September 29 |
Monday, September 30 |
| Day of Atonement* |
Tuesday, October 8 |
Wednesday, October 9 |
| Feast of Tabernacles (1st day)* |
Sunday, September 14 |
Monday, September 15 |
| 8th Day Assembly* |
Sunday, September 21 |
Monday, September 22 |
* These Appointed
Times may all occur one day previous
Understanding the Calculations
Visibility Number (VN) is the difference between the sun and moon setting times plus 27 times the illuminated percent of the moon plus 5.5 times the altitude of the moon at sunset minus 5 times the altitude of the sun at moonset, all divided by 1.7.
If the VN is:
* less
than 88 then the New Moon will not be seen
* between 88 and 100, it will probably not
be seen
* between 100 and 112, it will probably be seen
* anything greater than 112, it will be seen in reasonable
conditions.
EXAMPLE: The sun will set in Jerusalem at 6:37. The moon will set at 7:36. This is a 59 minute lag time (lag time = the time between sunset and moonset) -- plenty of time for the sky to darken enough after sunset for the moon to be sighted. 2.39% of the lunar surface will be illuminated. And the moon's altitude at sunset will be 11.4 degrees. The sun's altitude at moonset will be -12.6 degrees.
So using the calculations, we have 59 [lag time] + (27 x 2.39 = 64.53) [27 times illuminated percent] + (5.5 x 11.4 = 62.7) [5.5 times lunar altitude] - (5 x -12.6 = -63) [5 times sun's altitude] divided by 1.7 = 146.6
As seen above, anything over 112 should be visible (the higher the number, the greater the visibility), and we have a VN of 146.6 -- hence, New Moon!
Email: Brian Hoeck
©2021 Truth On The Web Ministries: All the articles originated by Kenneth Hoeck and/or Brian Hoeck may be freely distributed or mirrored as long as presented in their entirety (including this statement), attributed to Truth on The Web, and proper author credit given.
See also Projected Appointed Times for 2001-2030
Back to CALENDAR CHRONICLES
www.totw.org