Close approach of Moon and Venus

Moon and Venus will make a close approach, passing within 3º42' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:00 - 21:51
• Bogota: 18:11 - 20:24
• Madrid: 20:50 - 22:04

Comet Faye at perihelion

Comet 4P/Faye will reach the closest point along its orbit to the Sun, at a distance of 1.62 AU.

Visibility: Visible with a large telescope

Observing time:

• Mexico City: 02:43 - 06:30
• Bogota: 01:21 - 04:59
• Madrid: 03:06 - 06:45

Daytime sextant meteor shower 2021

The Daytime sextant meteor shower 2021 will be active from September 9 to October 9, producing its peak rate of meteors around September 27th. It will be best seen around the constellation of The Sextant.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 05:18 - 07:02
• Bogota: 03:38 - 05:21
• Madrid: 05:54 - 07:40

Moon at aphelion

Moon will reach the furthest point along its orbit to the Sun, at a distance of 1.0069 AU

Visibility: Not observable

47-Tuc well placed

The globular cluster 47-Tuc (NGC104) will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Tucana at around midnight local time.

Visibility: Not observable

Conjunction of Moon and Jupiter

Moon and Jupiter will share the same right ascension, with Moon passing 3º57' to the south of Jupiter.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:53 - 04:33
• Bogota: 18:08 - 03:12
• Madrid: 20:36 - 04:37

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: 4:43 PM
• Bogota: 16:43
• Madrid: 23:43

September Equinox

The September equinox marks the first day of autumn for the northern hemisphere and the first day of spring for the southern hemisphere. Day and night last almost exactly 12 hours.

Visibility: Not observable

Close approach of Moon and Jupiter

Moon and Jupiter will make a close approach, passing within 3º45' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:53 - 04:33
• Bogota: 18:08 - 03:12
• Madrid: 20:36 - 04:37

136472 Makemake at solar conjunction

136472 Makemake will pass very close to the Sun in the sky since it will be in the opposite side of the Sun. At closest approach, it will appear at a separation of only 27º from the Sun.

Visibility: Not observable

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: 05:03
• Bogota: 05:03
• Madrid: 12:03

Asteroid Pallas reaches opposition

Asteroid 2 Pallas will reach opposition and will be visible for much of the night, when it lies opposite to the Sun in the sky in the constellation of Pisces.

Visibility: Visible with a 4 inch telescope

Observing time:

• Mexico City: 20:59 - 05:51
• Bogota: 19:09 - 04:12
• Madrid: 22:05 - 06:07

Mercury at dichotomy

Mercury will reach half phase in its August - October evening apparition. It will be shining brightly at mag 0.1.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:05 - 20:54
• Bogota: 17:57 - 19:20
• Madrid: 20:21 - 21:03 (September 18)

Aurigid meteor shower 2021

The Aurigid meteor shower 2021 will be active from August 28 to September 5, producing its peak rate of meteors around September 1st. It will be best seen around the constellation of Auriga.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 01:47 - 06:59
• Bogota: 01:02 - 05:30
• Madrid: 00:37 - 07:13

Mars at apogee

Mars will reach the furthest point along its orbit to the Earth, at a distance of 2.64 AU.

Visibility: Not observable

Close approach of Moon and Uranus

Moon and Uranus will make a close approach, passing within 1º14' of each other in the sky.

Visibility: Visible with a small telescope

Observing time:

• Mexico City: 22:22 - 07:12
• Bogota: 20:58 - 05:32
• Madrid: 22:39 - 07:47

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: 19:04 - 07:07
• Bogota: 17:09 - 05:34
• Madrid: 19:59 - 07:12

NGC55 well placed

The barred irregular galaxy NGC55 will be well placed, high in the sky. It will reach its highest point in the sky in the constellation of Sculptor at around midnight local time.

Visibility: Visible with a 4 inch telescope

Observing time:

• Mexico City: 23:11 - 04:06
• Bogota: 20:08 - 03:40
• Madrid: not observable

Mercury at highest altitude in evening sky

Mercury will reach its highest point in the sky in its August - October evening apparition. It will be shining brightly at mag 0.1.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:42 - 20:56
• Bogota: 17:57 - 19:26
• Madrid: not observable

Conjunction of Moon and Mercury

Moon and Mercury will share the same right ascension, with Moon passing 6º31' to the north of Mercury.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:01 - 21:02
• Bogota: 18:13 - 19:28
• Madrid: not observable

Mercury at greatest elongation east

Mercury will reach its greatest separation from the Sun in its August - October evening apparition. It will be shining brightly at mag 0.1.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:41 - 20:56
• Bogota: 17:58 - 19:25
• Madrid: not observable

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: 19:57 - 00:51
• Bogota: 18:13 - 23:39
• Madrid: 20:48 - 00:38

Moon at perihelion

Moon will reach the closest point along its orbit to the Sun, at a distance of 1.0051 AU.

Visibility: Not observable

September ε-Perseid meteor shower 2021

The September ε-Perseid meteor shower 2021 will be active from 5 to September 21st, producing its peak rate of meteors around 9. It will be best seen around the constellation of Perseus.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 22:24 - 07:01
• Bogota: 21:38 - 05:28
• Madrid: 21:05 - 07:23

Conjunction of Moon and Venus

Moon and Venus will share the same right ascension, with Moon passing 4º04' to the north of Venus.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:01 - 21:54
• Bogota: 18:12 - 20:27
• Madrid: 20:50 - 22:03 (September 10)

Neptune reaches opposition

Neptune will reach opposition and will be visible for much of the night, when it lies opposite to the Sun in the sky in the constellation of Aquarius.

Visibility: Visible with a small telescope

Observing time:

• Mexico City: 21:14 - 05:53
• Bogota: 19:19 - 04:19
• Madrid: 22:30 - 05:58

New Moon

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

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: 00:50 - 07:13
• Bogota: 23:41 - 05:32
• Madrid: 00:27 - 07:51 (September 29)

Close approach of Moon and Saturn

Moon and Saturn will make a close approach, passing within 3º40' of each other in the sky.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:55 - 03:25
• Bogota: 18:10 - 02:13
• Madrid: 20:41 - 03:09 (September 17)

Conjunction of Moon and Saturn

Moon and Saturn will share the same right ascension, with Moon passing 3º45' to the south of Saturn.

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 19:55 - 03:25
• Bogota: 18:10 - 02:13
• Madrid: 20:41 - 03:09 (September 17)

Mercury at aphelion

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

Visibility: Visible to the naked eye

Observing time:

• Mexico City: 20:12 - 21:04
• Bogota: 18:23 - 19:29
• Madrid: not observable