The partial asteroidal occultation of Betelgeuse on Jan 2, 2012
Costantino Sigismondi
TL;DR
This paper reports on a rare partial occultation of Betelgeuse by asteroid 2005 UW381, providing a potential method for studying stellar transits and asteroid characteristics through brief, localized brightness drops.
Contribution
It documents a rare observational event of an asteroid occulting a supergiant star, highlighting its relevance for extrasolar planetary transit studies.
Findings
Brightness drop of 0.01 magnitudes observed
Event duration of 3.6 seconds
Limited geographical visibility of the event
Abstract
The asteroid (147857) 2005 UW381 will pass over the supergiant star Betelgeuse on January 2nd 2012. The event is visible on a limited geographical region, and the magnitude drop is only 0.01 magnitudes for a maximum duration of 3.6 seconds. The opportunity to measure this phenomenon can be interesting for dealing with extrasolar planetary transits.
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Taxonomy
TopicsAstro and Planetary Science · Stellar, planetary, and galactic studies · Astronomical and nuclear sciences