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

Lunar occultation of Spica

Dominic Ford, Editor
From the Lunar Occultations feed

Objects: Spica

The Moon will pass in front of Spica (Alpha Virginis), creating a lunar occultation visible from countries and territories including eastern China, Japan, North Korea and South Korea amongst others.

Unfortunately the occultation will not be visible from Seattle, though a close conjunction between the pair will be more widely visible.

The map below shows the visibility of the occultation across the world. Separate contours show where the disappearance of Spica (Alpha Virginis) 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 of the contours, the Moon does not pass in front of Spica (Alpha Virginis) at any time, or is below the horizon at the time of the occultation. However, a close conjunction between the pair may be visible.

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
China 17:59–04:13
Japan 23:38–04:34
North Korea 18:14–04:15
South Korea 18:04–04:18
Russia 08:31–04:16
Philippines 22:20–04:05
Taiwan 16:40–04:10
Papua New Guinea 22:55–14:53
Federated States of Micronesia 23:13–05:24
Hong Kong 16:35–04:03
Guam 23:04–04:25
Northern Mariana Islands 23:06–04:34
Palau 22:38–14:28
Macao 16:35–04:03

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 Spica (Alpha Virginis) at the moment of the occultation will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Spica (Alpha Virginis) 13h25m10s 11°09'S Virgo 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
27 Nov 2024 27 Nov 2024 Occultations of Spica (Alpha Virginis) 21 Jan 2025 28 Mar 2032
27 Nov 2024 18 Dec 2024 Occultations 28 Dec 2024 14 Jan 2025

The sky on 24 Dec 2024

The sky on 24 December 2024
Twilight ends
Twilight begins

23-day old moon
Waning Crescent


23 days old

Rise Culm. Set
Mercury 06:04 10:34 15:03
Venus 10:36 15:23 20:10
Moon 01:39 07:10 12:30
Mars 18:28 02:23 10:17
Jupiter 14:53 22:41 06:29
Saturn 11:29 16:56 22:22
All times shown in PST.


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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