Saturn enters retrograde motion

Saturn will enter retrograde motion, halting its usual eastward movement through the constellations, and turning to move westwards instead.
This reversal of direction is a phenomenon cuased the change of perspective due to Earth's and the outer planet's position. It occurs a few months before they reach opposition.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 00:58 - 06:30
• Bogota: 23:47 - 05:17
• Madrid: 02:15 - 06:15

Conjunction of Moon and Mars

Moon and Mars will share the same right ascension, with Moon passing 1º28' to the south of Mars.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:22 - 23:42
• Bogota: 18:18 - 21:34
• Madrid: 21:47 - 01:09

Close approach of Moon and Mars

Moon and Mars will make a close approach, passing within 1º28' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:22 - 23:42
• Bogota: 18:18 - 21:34
• Madrid: 21:47 - 01:09

Moon at First Quarter

The Moon will pass first quarter phase, during this time it appears almost exactly half illuminated.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:22 - 02:25
• Bogota: 18:17 - 23:50
• Madrid: 21:47 - 03:38

Moon at aphelion

Moon will reach the furthest point along its orbit to the Sun, at a distance of 1.0156 AU

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 14:46
• Bogota: 14:46
• Madrid: 21:46

η-Lyric meteor shower 2021

The η-Lyric meteor shower 2021 will be active from 3 to may 14, producing its peak rate of meteors around 8. It will be best seen around the constellation of Lyra.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 22:17 - 06:38
• Bogota: 21:39 - 05:22
• Madrid: all night

Mercury at highest altitude in evening sky

Mercury will reach its highest point in the sky in its April-June 2021 evening apparition. It will be shining brightly at mag 0.3.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:06 - 21:43
• Bogota: 18:05 - 19:34
• Madrid: 21:27 - 23:18

M5 well placed

Globular Cluster M5 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Serpens at around midnight local time.

Visibility: Visible with binoculars

Observing time:

• Mexico City: 21:06 - 06:06
• Bogota: 19:23 - 04:32
• Madrid: 22:35 - 05:47

Mercury at greatest elongation east

Mercury will reach its greatest separation from the Sun in its April-June 2021 evening apparition. It will be shining brightly at mag 0.3.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:06 - 21:43
• Bogota: 18:05 - 19:34
• Madrid: 21:27 - 23:18

Full Moon

The Moon will be almost exactly on the other side of the Sun and will appear fully illuminated.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:42 - 07:08
• Bogota: 18:27 - 05:49
• Madrid: 21:51 - 06:50

Total Lunar eclipse

The Moon will pass through the Earth's shadow, creating a total lunar eclipse. It will be visible from Oceania, America and East and South Asia.

Visibility: Visible to the naked eye

Observing time:

• Mexico City Total: 06:12 - 06:26
• Partial Mexico City: 04:45 - 07:52
• Bogotá total: 06:12 - 06:26
• Partial Bogotá: 04:45 - 07:52
• Madrid total: 13:12 - 13:26
• Madrid partial: 11:45 - 14:52

Moon at perihelion

Moon will reach the closest point along its orbit to the Sun, at a distance of 1.0072 AU.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 05:26
• Bogota: 05:26
• Madrid: 12:26

Moon at apogee

The Moon will reach the furthest point along its orbit to the Earth and will appear slightly smaller than at other times.

Visibility: Not observable

η-Aquarid meteor shower 2021

The η-Aquarid meteor shower 2021 will be active from 3 to 15 th of May, producing its peak rate of meteors around 6. It will be best seen around the constellation of Aquarius.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 22:17 - 06:38
• Bogota: 01:30 - 05:22
• Madrid: 03:50 - 06:36

New Moon

The Moon will pass close to the Sun and become lost in the its glare for a few days.

Visibility: Not observable

M4 well placed

Globular Cluster M4 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Scorpius at around midnight local time.

Visibility: Visible with binoculars

Observing time:

• Mexico City: 22:02 - 05:09
• Bogota: 19:39 - 04:11
• Madrid: 01:01 - 03:32

Conjunction of Venus and Mercury

Venus and Mercury will share the same right ascension, with Venus passing 0º25' to the north of Mercury.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:26 - 21:23
• Bogota: 18:18 - 19:14
• Madrid: 21:59 - 22:57

Conjunction of Moon and Saturn

Moon and Saturn will share the same right ascension, with Moon passing 4º09' to the south of Saturn.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 02:16 - 06:51
• Bogota: 00:16 - 05:31
• Madrid: 03:33 - 06:52

The Moon in the Last Quarter

The Moon will reach the last quarter of its phases, and will be prominent in the dawn sky, rising around midnight.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 02:31 - 06:51
• Bogota: 00:26 - 05:31
• Madrid: 03:53 - 06:52

Supermoon

Due to the closeness of the Full Moon and the Moon at Perigee events, this month the Full Moon will appear larger than normal.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:33 - 06:15
• Bogota: 17:26 - 04:52
• Madrid: 20:31 - 06:14

The Moon at perigee

The Moon will reach the closest point along its orbit to the Earth and will appear slightly larger than at other times.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 8:49 PM
• Bogota: 20:49
• Madrid: 03:49 (May 26)

Close approach of Moon and Saturn

Moon and Saturn will make a close approach, passing within 4º02' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 02:16 - 06:51
• Bogota: 00:16 - 05:31
• Madrid: 03:33 - 06:52

Mercury at dichotomy

Mercury will reach half phase in its April-June 2021 evening apparition. It will be shining brightly at mag -0.2.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:06 - 21:37
• Bogota: 18:02 - 19:28
• Madrid: 21:23 - 23:10

Conjunction of Moon and Jupiter

Moon and Jupiter will share the same right ascension, with Moon passing 4º36' to the south of Jupiter.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 03:08 - 06:51
• Bogota: 01:14 - 05:31
• Madrid: 04:10 - 06:52

Conjunction of Moon and Venus

Moon and Venus will share the same right ascension, with Moon passing 0º42' to the south of Venus.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:18 - 20:58
• Bogotá: not observable
• Madrid: not observable

Close approach of Moon and Jupiter

Moon and Jupiter will make a close approach, passing within 4º21' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 03:08 - 06:51
• Bogota: 01:14 - 05:31
• Madrid: 04:06 - 06:52

Conjunction of Moon and Mercury

Moon and Mercury will share the same right ascension, with Moon passing 2º08' to the south of Mercury.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:18 - 21:43
• Bogota: 18:18 - 19:33
• Madrid: 21:43 - 23:20

Conjunction of Moon and Saturn

Moon and Saturn will share the same right ascension, with Moon passing 4º10' to the south of Saturn.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 01:09 - 06:42
• Bogota: 23:06 - 05:30
• Madrid: 01:43 - 06:27

Close approach of Moon and Saturn

Moon and Saturn will make a close approach, passing within 4º03' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 01:09 - 06:42
• Bogota: 23:06 - 04:27
• Madrid: 01:43 - 06:27