The target - 46P/Wirtanen - is being observed by ACIS-S for 33 minutes and 20 seconds. The observation started 7 minutes ago and ends in 26 minutes, and is part of the proposal Close encounter with comet 46P/Wirtanen: X-ray tomography of the coma. The target is located in the constellation Taurus. See related observations: 20275, 21977, 21978, 21979, 21980, 21981, 21982, 21983, 21984, 21986, 21987, 21988, 21989, 21990, 21991, 21992, 21993.

This is a joint observation with Hubble Space Telescope (HST) (for 2 hours and 13 minutes). However, it does not necessarily mean that the observations will be done at the same time! This is a time-critical observation.

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