Moon Phase by minute every 0.5 skips 0.03-0.05 points

[vkponomarev]

[169426] => Array
(
[time] => 2021-03-28 15:46:00
[phase] => 0.4860146481117
)
[169427] => Array
(
[time] => 2021-03-28 15:47:00
[phase] => 0.48602569387438
)

[169428] => Array
(
[time] => 2021-03-28 15:48:00
[phase] => 0.51396329822454
)

[169429] => Array
(
[time] => 2021-03-28 15:49:00
[phase] => 0.51395232827628
)