Listed below are the computations for 2021 for the expected dates of New Moon visibility from Israel. The possible projected dates for the Appointed Times for 2021 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 |
Thursday, January 14, 2021 | 4:57 | 6:15 | 78 min. |
2.58 % |
13.0 | -15.6 | 174.7 | Yes |
| 12th | Saturday, February 13, 2021 | 5:24 | 7:03 | 99 min. | 3.85 % | 18.4 | -20.9 | 240.3 | Yes |
|
1st |
Sunday, March 14, 2021 | 5:46 | 6:46 | 60 min. |
1.64 % |
11.3 | -12.7 | 135.1 |
Yes |
|
2nd |
Tuesday, April 13, 2021 | 7:07 | 8:23 | 76 min. | 2.29 % | 14.5 | -15.5 | 173.5 | Yes |
|
3rd |
Thursday, May 13, 2021 | 7:28 | 9:05 | 97 min. | 3.20 % | 17.6 | -17.7 | 217.0 | Yes |
|
4th |
Friday, June 11, 2021 | 7:45 | 8:49 | 63 min. | 1.48 % | 11.1 | -11.5 | 130.6 | Yes |
|
5th |
Sunday, July 11, 2021 | 7:47 | 9:10 | 83 min. | 2.91 % | 15.0 | -14.7 | 186.9 |
Yes |
|
6th |
Monday, August 9, 2021 | 7:29 | 8:26 | 57 min. | 1.60 % | 10.6 | -11.1 | 125.9 | Yes |
|
7th |
Wednesday, September 8, 2021 | 6:54 | 8:04 | 70 min. | 3.53 % | 13.7 | -14.7 | 184.7 |
Yes |
|
8th |
Thursday, October 7, 2021 | 6:16 | 7:08 | 52 min. | 2.00 % | 9.65 | -11.1 | 126.1 |
Yes |
|
9th |
Saturday, November 6, 2021 | 4:45 | 6:05 | 80 min. |
4.45 % |
13.2 | -16.4 | 208.8 |
Yes |
|
10th |
Sunday, December 5, 2021 | 4:35 | 5:40 | 65 min. | 2.58 % | 10.2 | -12.9 | 150.1 |
Yes |
|
11th |
Tuesday, January 4, 2022* | 4:48 | 6:42 | 114 min. | 5.12 % | 18.4 | -22.8 | 275.0 | Yes |
|
12th |
Wednesday, February 2, 2022 | 5:14 | 6:37 | 83 min. | 2.85 % | 14.7 | -17.2 | 192.3 | Yes |
| 13th | Thursday, March 3, 2022* | 5:38 | 6:27 | 49 min. | 1.20 % | 9.02 | -10.5 | 107.9 |
* Tuesday, January 4, 2022 - The moon may possibly be visible one evening earlier, but most likely not. Here are the stats for that date: On Monday evening (January 3, 2022), we expect a 4:48 pm sunset & 5:30 pm moon set (therefore, a lag time of 42 minutes), 1.20 % of illumination, with a lunar altitude at sunset of 6.67 degrees and a solar altitude of -8.32 at moonset. VN = 89.82 -- SIGHTED TUESDAY, JANUARY 4, 2022
* Thursday, March 3, 2022 - The moon may possibly not be visible until one evening later. Here are the stats for that date: On Friday evening (March 4, 2022), we expect a 5:39 pm sunset & 7:29 pm moon set (therefore, a lag time of 110 minutes), 4.51 % of illumination, with a lunar altitude at sunset of 21.4 degrees and a solar altitude of -23.4 at moonset. VN = 274.2
|
Event |
begins sunset of |
ends sunset of |
|
Passover (Lord's Supper) - Aviv 14 |
Saturday, March 27 |
Sunday, March 28 |
|
Feast of Unleavens (1st day) - Aviv 15 |
Sunday, March 28 |
Monday, March 29 |
| Elevation Sheaf Day (aka "wave sheaf") |
Saturday, April 3 |
Sunday, April 4 |
| Feast of Unleavens (7th day) - Aviv 21 |
Saturday, April 3 |
Sunday, April 4 |
| Pentecost |
Saturday, May 22 |
Sunday, May 23 |
| Day of Shouting (aka "Trumpets") |
Wednesday, September 8 |
Thursday, September 9 |
| Day of Atonement |
Friday, September 17 |
Saturday, September 18 |
| Feast of Tabernacles (1st day) |
Wednesday, September 22 |
Thursday, September 23 |
| 8th Day Assembly |
Wednesday, September 29 |
Thursday, September 30 |
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
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