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

Lunar occultation of Antares

Dominic Ford, Editor
From the Lunar Occultations feed

Objects: Antares

The Moon will pass in front of Antares (Alpha Scorpii), creating a lunar occultation visible from Sub-Saharan Africa. 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 San Diego.

The map below shows the visibility of the occultation across the world. Separate contours show where the disappearance of Antares (Alpha Scorpii) 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 Antares (Alpha Scorpii) 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.

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

Country Time span
South Africa 22:32–00:38
Angola 22:09–23:55
Namibia 22:11–00:05
Mozambique 22:56–00:42
Botswana 22:28–00:20
Madagascar 23:34–01:15
Zambia 22:29–00:04
Zimbabwe 22:38–00:28
Democratic Republic of the Congo 22:11–23:46
Ivory Coast 21:48–22:38
Guinea 21:48–22:33
Gabon 22:09–22:56
Ghana 21:55–22:34
Liberia 21:46–22:38
Republic of the Congo 22:10–23:00
Sierra Leone 21:46–22:35
Malawi 23:15–00:18
Mali 21:57–22:22
Guinea-Bissau 21:48–22:30
Swaziland 22:56–00:36
Senegal 21:55–22:23
Mauritius 00:20–01:38
Reunion 00:13–01:34
Sao Tome and Principe 22:05–22:43
French Southern Territories 00:18–00:42
Saint Helena 21:49–23:03
Lesotho 22:52–00:25

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 Antares (Alpha Scorpii) at the moment of the occultation will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Antares (Alpha Scorpii) 16h29m20s 26°25'S Scorpius 1.1 0'00"

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
24 May 2024 27 Mar 2027 Occultations of Antares (Alpha Scorpii) 21 May 2027 10 May 2028
06 Oct 2026 15 Apr 2027 Occultations 26 Apr 2027 20 Jun 2027

The sky on 23 Apr 2027

The sky on 23 April 2027
Twilight ends
Twilight begins

17-day old moon
Waning Gibbous


17 days old

Rise Culm. Set
Mercury 05:57 12:25 18:52
Venus 04:56 10:59 17:02
Moon 21:38 02:40 07:38
Mars 13:41 20:26 03:11
Jupiter 13:11 19:59 02:46
Saturn 05:40 11:56 18:13
All times shown in PDT.


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.

Image credit

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


San Diego



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