Asteroid Nysa well placed

Asteroid 44 Nysa will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Taurus at around midnight local time.

Visibility: Visible with a 4 inch telescope

Observing time:

• Mexico City: 19:44 - 05:21
• Bogota: 19:15 - 04:22
• Madrid: 20:11 - 06:16

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: 18:13 - 00:00
• Bogota: 18:00 - 23:31
• Madrid: 18:08 - 00:05 (December 11)

Close approach of Moon and Saturn

Moon and Saturn will make a close approach, passing within 4º04' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:15 - 21:55
• Bogota: 17:58 - 21:36
• Madrid: 18:10 - 21:49 (December 8)

Moon at aphelion

Moon will reach the furthest point along its orbit to the Sun, at a distance of 0.9866 AU

Visibility: Not observable

Moon at Last Quarter

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

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 01:16 - 06:51
• Bogota: 00:01 - 05:46
• Madrid: 01:53 - 08:18

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: 17:41 - 07:36
• Bogota: 17:27 - 06:17
• Madrid: 16:33 - 08:05

Ursid meteor shower 2021

The Ursid meteor shower 2021 will be active from December 17 to December 26, producing its peak rate of meteors around the 22nd. It will be best seen around the constellation of Ursa Minor.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: all night
• Bogota: 00:55 - 05:35
• Madrid: all night

Conjunction of Mercury and Pluto

Mercury and Pluto will share the same right ascension, with Mercury passing 0º13' to the south of Pluto.

Visibility: Visible with a large telescope

Observing time:

• Mexico City: 18:27 - 19:23
• Bogota: 18:14 - 19:09
• Madrid: not observable

Leonis Minorid meteor shower 2021

The Leonis Minorid meteor shower 2021 will be active from December 5 to January 4, producing its peak rate of meteors around December 19. It will be best seen around the constellation of Leo Minoris.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 22:39 - 06:41
• Bogota: 22:35 - 05:36
• Madrid: 22:07 - 08:03

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: Visible to the naked eye

Observing time:

• Mexico City: 20:14
• Bogota: 21:14
• Madrid: 03:14 (December 18)

Neptune ends retrograde motion

Neptune will reach the end of its retrograde motion, ending its westward movement through the constellations and returning to more usual eastward motion 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 after they pass opposition.

Visibility: Visible with a small telescope

Observing time:

• Mexico City: 8:55 - 23:38
• Bogota: 18:34 - 23:09
• Madrid: 19:01 - 23:42

December Solstice

The December solstice marks the first day of winter for the Northern Hemisphere and the first day of summer for the Southern Hemisphere. December 21 will be the shortest day of 2021 in the Northern Hemisphere and the longest in the Southern Hemisphere.

Visibility: Not observable

Mercury at aphelion

Mercury will reach the furthest point along its orbit to the Sun, at a distance of 0.47 AU

Visibility: Not observable

NGC 2244 well placed

The open star cluster NGC 2244 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Monoceros at around midnight local time.

Visibility: Visible with binoculars

Observing time:

• Mexico City: 19:53 - 05:20
• Bogota: 19:13 - 04:39
• Madrid: 20:43 - 05:50

Conjunction of Moon and Mars

Moon and Mars will share the same right ascension, with Moon passing 0º41' to the north of Mars.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 05:34 - 06:39
• Bogota: 04:37 - 05:35
• Madrid: 06:48 - 08:02 (December 3)

σ-Hydrid meteor shower 2021

The σ-Hydrid meteor shower 2021 will be active from December 3rd to December 15, producing its peak rate of meteors around the 12th. It will be best seen around the constellation of Hydra.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 21:35 - 06:35
• Bogota: 20:57 - 05:30
• Madrid: 22:11 - 07:57

Total Solar eclipse

The Moon will pass in front of the Sun, creating a total solar eclipse. It will be visible from Antarctica.

Visibility: Not observable

New Moon

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

Visibility: Not observable

Comet Leonard at perigee

The comet C/2021 A1 (Leonard) will make its closest approach to the Earth, at a distance of 0.23 AU.

Visibility: Visible with binoculars

Observing time:

• Mexico City: not observable
• Bogotá: not observable
• Madrid: not observable

Lunar occultation of Mars

The Moon will pass in front of Mars, creating a lunar occultation visible from parts of Australia. Due to the closeness of the Moon to the Earth, a lunar occultation is not visible all the world.

Visibility: Visible with binoculars

Observing time:

• Mexico City: not observable
• Bogotá: not observable
• Madrid: not observable

Pheonicid meteor shower 2021

The Pheonicid meteor shower 2021 will be active from November 28 to December 9, producing its peak rate of meteors around December 2nd. It will be best seen around the constellation of Phoenix.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: dusk - 01:13
• Bogotá: dusk - 01:59
• Madrid: not observable

Conjunction of Moon and Mars

Moon and Mars will share the same right ascension, with Moon passing 0º56' to the south of Mars.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 05:13 - 06:55
• Bogota: 04:07 - 05:50
• Madrid: 06:42 - 08:17

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: 04:04
• Bogota: 05:04
• Madrid: 11:04

Monocerotid meteor shower 2021

The Monocerotid meteor shower 2021 will be active from December 5 to December 20, producing its peak rate of meteors around the 9th. It will be best seen around the constellation of Monoceros.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:51 - 06:37
• Bogota: 19:19 - 05:28
• Madrid: 20:15 - 07:55

Conjunction of Moon and Jupiter

Moon and Jupiter will share the same right ascension, with Moon passing 4º28' to the south of Jupiter.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:13 - 23:02
• Bogota: 18:00 - 22:37
• Madrid: 18:07 - 23:11

Geminid meteor shower 2021

The Geminid meteor shower 2021 will be active from December 4 to December 17, producing its peak rate of meteors around the 14th. It will be best seen around the constellation of Gemini.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:37 - 06:37
• Bogota: 19:37 - 05:32
• Madrid: 18:55 - 07:59

Close approach of Moon and Jupiter

Moon and Jupiter will make a close approach, passing within 4º13' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:13 - 23:02
• Bogota: 18:00 - 22:37
• Madrid: 18:07 - 23:11

Close approach of Moon and Mars

Moon and Mars will make a close approach, passing within 0º55' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 05:13 - 06:55
• Bogota: 04:07 - 05:50
• Madrid: 06:42 - 08:17

Large Magellanic Cloud well placed

The Large Magellanic Cloud will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Dorado at around midnight local time.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: not observable
• Bogota: 21:28 - 02:14
• Madrid: not observable

Conjunction of Venus and Pluto

Venus and Pluto will share the same right ascension, with Venus passing 0º20' to the north of Pluto.

Visibility: Visible with a large telescope

Observing time:

• Mexico City: 18:15 - 20:31
• Bogotá: 18:03 - 20:12 (December 13)
• Madrid: 18:10 - 20:18 (December 13)

φ-Cassiopeid meteor shower 2021

The φ-Cassiopeid meteor shower 2021 will be active from December 1st to December 8, producing its peak rate of meteors around the 6th. It will be best seen around the constellation of Cassiopeia.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: dusk - 04:52
• Bogotá: dusk - 02:54
• Madrid: all night

Close approach of Moon and Venus

Moon and Venus will make a close approach, passing within 1º51' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:14 - 20:44
• Bogota: 17:57 - 20:31
• Madrid: 18:09 - 20:29 (December 7)

Conjunction of Venus and Mercury

Venus and Mercury will share the same right ascension, with Venus passing 4º13' to the north of Mercury.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:25 - 19:25
• Bogota: 18:08 - 19:07
• Madrid: 18:16 - 19:22 (December 29)

NGC 2232 well placed

The open star cluster NGC 2232 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Monoceros at around midnight local time.

Visibility: Visible with binoculars

Observing time:

• Mexico City: 20:02 - 05:11
• Bogota: 19:12 - 04:40
• Madrid: 21:14 - 05:20

Conjunction of Moon and Venus

Moon and Venus will share the same right ascension, with Moon passing 1º52' to the south of Venus.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:14 - 20:44
• Bogota: 17:57 - 20:31
• Madrid: 18:09 - 20:29 (December 7)

NGC 1981 well placed

The open star cluster NGC 1981 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Orion at around midnight local time.

Visibility: Visible with binoculars

Observing time:

• Mexico City: 20:00 - 05:10
• Bogota: 19:10 - 04:39
• Madrid: 21:11 - 05:20

Puppid-Velid meteor shower 2021

The Puppid-Velid meteor shower 2021 will be active from December 1st to December 15, producing its peak rate of meteors around the 7th. It will be best seen around the constellation of Vela.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 23:03 - 06:35
• Bogota: 21:19 - 05:30
• Madrid: not observable

Venus at greatest brightness

Venus will reach its greatest brightness in its 2021-2022 evening apparition. It will be shining brightly at mag -8.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 17:59 - 20:38
• Bogota: 17:47 - 20:20
• Madrid: 17:48 - 20:32

Conjunction of Moon and Saturn

Moon and Saturn will share the same right ascension, with Moon passing 4º11' to the south of Saturn.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 18:15 - 21:55
• Bogota: 17:58 - 21:36
• Madrid: 18:10 - 21:49 (December 8)

Comae Berenicid meteor shower 2021

The Comae Berenicid meteor shower 2021 will be active from December 12 to December 23, producing its peak rate of meteors around the 16th. It will be best seen around the constellation of Coma Berenices.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 00:08 - 06:38
• Bogota: 23:48 - 05:33
• Madrid: 00:10 - 08:00

Moon at perihelion

Moon will reach the closest point along its orbit to the Sun, at a distance of 0.9832 AU.

Visibility: Not observable