53 days ago
Dominic Ford, Editor
From the Lunar Occultations feed
The Moon will pass in front of Mars, creating a lunar occultation visible from countries and territories including the Contiguous United States, Mexico, Colombia and Venezuela amongst others.
The occultation will be visible from Austin. It will begin with the disappearance of Mars behind the Moon at 23:10 CST in the western sky at an altitude of 52.2 degrees. Its reappearance will be visible at 00:12 CST at an altitude of 38.9 degrees.
The map below shows the visibility of the occultation across the world. Separate contours show where the disappearance of Mars 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 of the contours, the Moon does not pass in front of Mars 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:
|The Contiguous United States||02:31–13:14|
|Turks and Caicos Islands||18:57–00:45|
|British Virgin Islands||19:03–00:44|
|U.S. Virgin Islands||19:03–00:44|
|Bonaire, Saint Eustatius and Saba||00:30–08:43|
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 25 days past new moon and will be 74% illuminated. Mars will disappear behind the unilluminated side of the Moon and reappear from behind the illuminated side of the Moon.
The position of Mars at the moment of the occultation will be as follows:
|Object||Right Ascension||Declination||Constellation||Magnitude||Angular Size|
The coordinates above are given in J2000.0.
|« Previous||Next »|
|Visible from the Contiguous United States||Worldwide||Worldwide||Visible from the Contiguous United States|
|08 Dec 2022||03 Jan 2023||Occultations of Mars||28 Feb 2023||14 Jan 2025|
|08 Dec 2022||29 Jan 2023||Occultations||14 Feb 2023||17 May 2023|
The sky on 30 Jan 2023
|The sky on 30 January 2023|
9 days old
All times shown in CST.
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.
|07 Dec 2022||– Mars at opposition|
|12 Jan 2025||– Mars at perigee|
|15 Jan 2025||– Mars at opposition|
|19 Feb 2027||– Mars at opposition|
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.