Questions tagged [occultation]

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Is 486958 Arrokoth (2014 MU69 aka Ultima Thule) the only object determined to be binary by occultation?

The asteroid 486958 Arrokoth was discovered to be binary by astronomers lugging a bunch of telescopes around (I think) camping with them. The timing offered additional astrometry for the orbit ...
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How to understand the meaning of this International Occultation Timing Association (IOTA) lunar occultation of Mars map?

Earthsky.org's Watch Mars disappear behind the moon on February 18 as well as Moon occults Mars morning of February 18 include the image below and credit it to The International Occultation Timing ...
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How do we differentiate an eclipse, transit and occultation? [duplicate]

Different online resources seems to be confusing in this respect. What actually differentiate an eclipse from transit and occultation? The involvement of shadows, relative apparent sizes of the ...
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1answer
136 views

How long would an occultation by a TNO last?

A trans-Neptunian object, 1 million km from the observer, with an angular diameter of 0.126° occults the Sun (angular diameter of 0.004°) and the TNO and the observer are moving in the same direction, ...
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1answer
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Determining the shape of ʻOumuamua via stellar occultation

As far as I know, our current knowledge regarding the exact shape and size of ʻOumuamua is based on the analysis of its light curve and the assumption that it has a uniform albedo. ʻOumuamua is very ...
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1answer
165 views

When are the planets occulted by the sun?

There are numerous lists available of past and future planetary transits and occultations, but I can't find any that list transits behind the sun. Do the planets in our solar system ever pass ...
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734 views

How does an eclipse differ from an occultation?

A comment in response to this question suggests that an eclipse differs from an occultation in that the former casts a shadow while the latter doesn't. This isn't particularly satisfactory since ...
2
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1answer
66 views

What star was the asteroid 2014 MU69 predicted to occult on 2018-08-04?

From a search, I found a list of some preparatory HST observations made for the August 4, 2018 occultation of a star by the asteroid 2014 MU69 We propose observations in support of the upcoming New ...
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How do I measure occultation for the upcoming lunar eclipse?

I'm trying to simulate the lunar eclipse on Jan. 31, similar to this simulation I made of last year's solar eclipse, using Three.js. I have the minute-by-minute coordinates for the Sun and the Moon in ...
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How often do comet occultations of stars happen?

By travelling to specific places, astronomers can see three thousand star comet transition events every year at m15 for the major (50km+) comets and asteroids averaging about 20 seconds, perhaps that'...
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1answer
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Occultations of Triton

I've been listening to an episode of the "NASA in Silicon Valley" podcast about the SOFIA mission. One of the techniques they use at SOFIA is stellar occultations to study different objects. My ...
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What is the farthest reported distance from observer from which a solar system body has occulted a star?

I originally wrote "...farthest distance from Earth..." but changed to "observer" in case the occultation was observed from a space telescope. It may not matter much but I didn't want to over-...
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571 views

Where and how to look up the coordinates and magnitude of the star in this occultation prediction?

The motivation for this question comes from this question. A star is named in the occultation prediction shown below, from AsteroidOccultations.com's News & Announcements for 2014 MU69 on ...