The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Lunar occultation of Venus

Dominic Ford, Editor
From the Lunar Occultations feed

Objects: Venus

The Moon will pass in front of Venus, creating a lunar occultation visible from countries and territories including the western Contiguous United States, western Canada, Alaska and western Mexico amongst others. Although the occultation will only be visible across part of the world – because the Moon is so close to the Earth that its position in the sky varies by as much as two degrees across the world – a close conjunction between the pair will be more widely visible.

Unfortunately the occultation will not be visible from Ashburn, though it will be visible from western parts of the Contiguous United States.

The map below shows the visibility of the occultation across the world. Separate contours show where the disappearance of Venus is visible (shown in red), and where its reappearance is visible (shown in blue). Solid contours show where each event is likely to be visible through binoculars at a reasonable altitude in the sky. Dotted contours indicate where each event occurs above the horizon, but may not be visible due to the sky being too bright or the Moon being very close to the horizon.

Map showing where the occultation is visible

Outside the contours, the Moon will not pass in front of Venus at any time, or is below the horizon at the time of the occultation. However, a close conjunction between the pair will be visible across much of the world.

The map can be downloaded in PNG , PDF or SVG format. A KMZ file , is also available, which can be opened in Google Earth to provide a higher resolution map.

The animation below shows the path of the occultation across the Earth's globe. The red circle shows where the Moon appears in front of Venus.

You can download this video in MP4 or OGG format.

A complete list of the countries and territories where the occultation will be visible is as follows:

Country Time span
(UTC)
The Contiguous United States 21:01–22:43
Canada 20:27–21:59
Alaska 19:23–21:27
Mexico 21:24–22:56
Hawaii 20:08–21:46
Russia 19:18–20:30
Midway Atoll 19:51–21:13
Clipperton Island 22:11–22:54
Midway Islands 19:45–20:28

Lunar occultations are only ever visible from a small fraction of the Earth's surface. Since the Moon is much closer to the Earth than other celestial objects, its exact position in the sky differs depending on your exact location on Earth due to its large parallax. The position of the Moon as seen from two points on opposite sides of the Earth varies by up to two degrees, or four times the diameter of the full moon.

This means that if the Moon is aligned to pass in front of a particular object for an observer on one side of the Earth, it will appear up to two degrees away from that object on the other side of the Earth.

The position of Venus at the moment of the occultation will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Venus 15h36m50s 17°59'S Libra -4.0 0'11"

The coordinates above are given in J2000.0.

Next/previous occultations

« Previous Next »
Visible from the Contiguous United States Worldwide Worldwide Visible from the Contiguous United States
07 Dec 2015 19 Jun 2020 Occultations of Venus 12 May 2021 07 Apr 2024
22 Sep 2020 19 Oct 2020 Occultations 09 Jan 2021 25 Jun 2021

The sky on 12 Dec 2020

The sky on 12 December 2020
Sunrise
07:17
Sunset
16:47
Twilight ends
18:23
Twilight begins
05:41

27-day old moon
Waning Crescent

2%

27 days old

Planets
Rise Culm. Set
Mercury 07:03 11:44 16:25
Venus 05:16 10:18 15:21
Moon 04:43 10:05 15:20
Mars 13:24 19:53 02:23
Jupiter 09:53 14:43 19:34
Saturn 09:55 14:47 19:40
All times shown in EST.

Source

The circumstances of this event were computed using the DE430 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Related news

02 Sep 2020  –  Venus at highest altitude in morning sky
29 Oct 2021  –  Venus at greatest elongation east
06 Dec 2021  –  Venus at highest altitude in evening sky
16 Feb 2022  –  Venus at highest altitude in morning sky

Image credit

The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

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