Lunar Calendar Month May 2023 (Costa Rica)

The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite in the solar system relative to the size of its planet. The following is information specific for San José, Costa Rica during May 2023.

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Date and time of moon phases

The information in the following table comes from calculations published by the Astronomical Applications Department of the U.S. Naval Observatory.

Moon phases	Dates	Time
full moon	2023-05-05	11:34
3rd quarter	2023-05-12	08:28
new moon	2023-05-19	09:53
1st quarter	2023-05-27	09:22

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during May 2023.

Position	Dates	Time	Distance	Notes
Perigee	2023-05-10	22:59	369,344 km
Apogee	2023-05-25	19:40	404,509 km

Eclipses in May 2023

The following is information about eclipses occuring worldwide during May 2023. The eclipses listed here may be totally visible, partly visible or not visible in any part of Costa Rica.

Type	Dates	Saros	Notes
lunar eclipse	2023-05-05	141

Moon-Planet Conjunctions

A Moon-planet conjunction occurs when an astronomical object has either the same, or nearly the same, right ascension or the same ecliptic longitude of that of the Moon, as observed from Earth.

Astronomical Objects	Date and Time
Antares	2023-05-07 06:35
Saturn	2023-05-13 07:04
Jupiter	2023-05-17 07:15
Mercury	2023-05-17 19:34
Venus	2023-05-23 06:08
Pollux	2023-05-23 19:36
Mars	2023-05-24 11:32

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of May 2023.

May 2023
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 18	1Monday 80% illuminated Age: 10.4	2Tuesday 87.2% illuminated Age: 11.3	3Wednesday 93.2% illuminated Age: 12.3	4Thursday 97.5% illuminated Age: 13.3	5Friday 99.7% illuminated Age: 14.3	6Saturday 99.7% illuminated Age: 15.3	7Sunday 97.2% illuminated Age: 16.4
Week 19	8Monday 92.2% illuminated Age: 17.4	9Tuesday 85% illuminated Age: 18.5	10Wednesday 75.9% illuminated Age: 19.6	11Thursday 65.4% illuminated Age: 20.7	12Friday 54.1% illuminated Age: 21.8	13Saturday 42.7% illuminated Age: 22.8	14Sunday 31.7% illuminated Age: 23.9
Week 20	15Monday 21.7% illuminated Age: 25	16Tuesday 13.2% illuminated Age: 26	17Wednesday 6.6% illuminated Age: 27.1	18Thursday 2.3% illuminated Age: 28.1	19Friday 0.2% illuminated Age: 29.1	20Saturday 0.4% illuminated Age: 0.6	21Sunday 2.7% illuminated Age: 1.6
Week 21	22Monday 7% illuminated Age: 2.5	23Tuesday 12.8% illuminated Age: 3.4	24Wednesday 19.9% illuminated Age: 4.4	25Thursday 28.1% illuminated Age: 5.2	26Friday 36.9% illuminated Age: 6.1	27Saturday 46.3% illuminated Age: 7	28Sunday 55.8% illuminated Age: 7.9
Week 22	29Monday 65.3% illuminated Age: 8.8	30Tuesday 74.3% illuminated Age: 9.8	31Wednesday 82.7% illuminated Age: 10.7	1 Thursday	2 Friday	3 Saturday	4 Sunday
	5 Monday	6 Tuesday	7 Wednesday	8 Thursday	9 Friday	10 Saturday	11 Sunday
	12 Monday	13 Tuesday	14 Wednesday	15 Thursday	16 Friday	17 Saturday	18 Sunday