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 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 Cambridge.

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.

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
(UTC)
Sudan 00:17–01:29
Democratic Republic of the Congo 00:20–01:30
Ethiopia 00:21–01:34
Chad 00:17–01:17
Tanzania 00:26–01:49
Madagascar 00:49–02:14
Central African Republic 00:17–01:22
Kenya 00:22–01:43
Somalia 00:28–01:43
Mozambique 00:42–01:51
Cameroon 00:18–01:14
Zambia 00:38–01:35
Republic of the Congo 00:23–01:16
Gabon 00:29–01:11
Uganda 00:22–01:32
Egypt 00:26–01:04
Libya 00:21–01:09
Eritrea 00:29–01:13
Malawi 00:40–01:39
Nigeria 00:20–01:14
Angola 00:44–01:13
Yemen 00:44–01:11
Burundi 00:28–01:30
Rwanda 00:26–01:30
Equatorial Guinea 00:31–01:09
Djibouti 00:34–01:19
Zimbabwe 01:04–01:25
Mauritius 01:13–02:37
Reunion 01:12–02:32
Seychelles 00:43–02:14
Comoros 00:45–01:57
Mayotte 00:47–02:01

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
14 Jan 1950 Occultations of Antares (Alpha Scorpii) 10 Mar 1950 25 Jan 1968
11 Jan 1950 07 Feb 1950 Occultations 26 Feb 1950 07 Mar 1950

The sky on 26 Nov 2024

The sky on 26 November 2024
Sunrise
06:46
Sunset
16:13
Twilight ends
17:53
Twilight begins
05:06


Waning Crescent

11%

25 days old

Planets
Rise Culm. Set
Mercury 08:21 12:45 17:10
Venus 10:11 14:36 19:00
Moon 02:14 08:04 13:43
Mars 20:26 03:53 11:20
Jupiter 16:56 00:27 07:58
Saturn 12:46 18:17 23:48
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.

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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