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

Lunar occultation of Aldebaran

Dominic Ford, Editor
From the Lunar Occultations feed

Objects: Aldebaran
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The Moon will pass in front of Aldebaran (Alpha Tauri), creating a lunar occultation visible from countries and territories including the Contiguous United States, Mexico, south-eastern Canada and Cuba 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.

The occultation will be visible from Fairfield. It will begin with the disappearance of Aldebaran (Alpha Tauri) behind the Moon at 21:02 EDT in the western sky at an altitude of 23.1 degrees. Its reappearance will be visible at 21:48 EDT at an altitude of 14.4 degrees.

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

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 00:24–02:07
Mexico 00:25–02:02
Canada 00:42–01:46
Cuba 01:11–02:09
Honduras 01:27–01:55
Dominican Republic 01:19–02:09
Guatemala 01:21–01:53
Haiti 01:19–02:09
Bahamas 01:08–02:09
Belize 01:19–01:56
Colombia 01:36–02:01
Jamaica 01:21–02:07
Puerto Rico 01:21–02:10
Nicaragua 01:34–01:52
Turks and Caicos Islands 01:16–02:09
British Virgin Islands 01:21–02:07
Cayman Islands 01:18–02:05
Venezuela 01:39–01:58
Bermuda 01:10–02:01
Aruba 01:34–02:02
U.S. Virgin Islands 01:21–02:08
Navassa Island 01:21–02:07

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.

At the time of the occultation, the Moon will be 0 days past new moon and will be 17% illuminated. Aldebaran (Alpha Tauri) will disappear behind the unilluminated side of the Moon and reappear from behind the illuminated side of the Moon.

The position of Aldebaran (Alpha Tauri) at the moment of the occultation will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Aldebaran (Alpha Tauri) 04h35m50s 16°30'N Taurus 1.0 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
20 Jan 2035 15 Mar 2035 Occultations of Aldebaran (Alpha Tauri) 09 May 2035 20 Oct 2035
20 Jan 2035 15 Mar 2035 Occultations 09 May 2035 20 Oct 2035

The sky on 11 Apr 2035

The sky on 11 April 2035
Sunrise
06:18
Sunset
19:27
Twilight ends
21:05
Twilight begins
04:40

3-day old moon
Waxing Crescent

21%

3 days old

Planets
Rise Culm. Set
Mercury 06:35 13:16 19:57
Venus 05:14 10:59 16:43
Moon 08:50 15:58 23:12
Mars 02:56 07:39 12:22
Jupiter 06:34 13:08 19:42
Saturn 12:12 19:34 02:55
All times shown in EDT.

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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Fairfield

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41.14°N
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