File:Unexplained brightening of AKO 9 in 47 Tucanae (eso9703a).jpg

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Captions

Captions

This is a reproduction of two images obtained in late 1996 with the Hubble Space Telescope (HST) , showing the field of the variable star AKO 9 at the centre of the southern globular cluster 47 Tucanae .

Summary

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Description
English: This is a reproduction of two images obtained in late 1996 with the Hubble Space Telescope (HST) , showing the field of the variable star AKO 9 at the centre of the southern globular cluster 47 Tucanae .



This star brightened by more than 2 magnitudes (a factor of seven) in less than 1 hour. Left: the first frame; right: the last frame in a series of 15 exposures, obtained during a period of just over 4 hours.


Yhe field of each image measures 3.9 arcsec x 3.9 arcsec. North is up and East is to the left.

No other star among the > 30,000 studied was found to have such a large amplitude.
Date 15 January 1997 (upload date)
Source
This media was produced by the European Southern Observatory (ESO), under the identifier eso9703a

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Author ESO
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current20:40, 22 June 2024Thumbnail for version as of 20:40, 22 June 20243,284 × 1,629 (1.46 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://www.eso.org/public/archives/images/large/eso9703a.jpg via Commons:Spacemedia

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