sentences:  The comet was officially announced after a ground-based confirmation by Robert McNaught (Siding Spring Survey) on July 12.Although perihelion was Sept 28, 2006, the comet flared dramatically from seventh magnitude to fourth magnitude on October 24, 2006, becoming visible with the naked eye.Comet C/2006 M4 is in a hyperbolic trajectory (with an osculating eccentricity larger than 1) during its passage through the inner Solar System.