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The eruption of the recurrent nova U Scorpii on 28 January 2010 is now theall-time best observed nova event. We report 36,776 magnitudes throughout its67 day eruption, for an average of one measure every 2.6 minutes. This uniqueand unprecedented coverage is the first time that a nova has any substantialamount of fast photometry. With this, two new phenomena have been discovered:the fast flares in the early light curve seen from days 9-15 (which have noproposed explanation) and the optical dips seen out of eclipse from days 41-61(likely caused by raised rims of the accretion disk occulting the bright innerregions of the disk as seen over specific orbital phases). The expanding shelland wind cleared enough from days 12-15 so that the inner binary system becamevisible, resulting in the sudden onset of eclipses and the turn-on of thesupersoft X-ray source. On day 15, a strong asymmetry in the out-of-eclipselight points to the existence of the accretion stream. The normal opticalflickering restarts on day 24.5. For days 15-26, eclipse mapping shows that theoptical source is spherically symmetric with a radius of 4.1 R_sun. For days26-41, the optical light is coming from a rim-bright disk of radius 3.4 R_sun.For days 41-67, the optical source is a center-bright disk of radius 2.2 R_sun.Throughout the eruption, the colors remain essentially constant. We present 12eclipse times during eruption plus five just after the eruption.

Eclipses During the 2010 Eruption of the Recurrent Nova U Scorpii