<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><head></head><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="font: 12.0px Helvetica"></span><span style="letter-spacing: 0.0px">* <b>MESSENGER</b> - June 22, 2012</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px"><b>MESSENGER Completes Its 1,000th Orbit of Mercury</b></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">"MESSENGER will complete its 1,000th orbit of the planet closest to the Sun at 11:22 p.m. EDT tonight [June 22, 2012]. "Reaching this milestone is yet another testimony to the hard work and dedication of the full MESSENGER team that has designed, launched, and operated this highly successful spacecraft," says the mission trajectory lead Jim McAdams of the Johns Hopkins University Applied Physics Laboratory in Laurel, Md.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">The spacecraft was inserted into orbit around Mercury in mid-March 2011, after traveling more than 15 times around the Sun through the inner solar system and completing six planetary flybys. "Since arriving at Mercury, MESSENGER took a little more than 15 months to reach this mark," McAdams notes. "But because the orbital period has been reduced from just under 12 hours to 8 hours, it will take only 11 months to complete the next 1,000 orbits."</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">During its primary mission, which concluded on March 17, 2012, MESSENGER performed the first global reconnaissance of the geochemistry, geophysics, geologic history, atmosphere, magnetosphere, and plasma environment of Mercury. The spacecraft is now more than one-quarter of the way into a one-year extended mission that is building on this knowledge to address new questions raised by the initial orbital observations."</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; color: rgb(31, 0, 172); "><span style="letter-spacing: 0.0px; color: #000000">The new app is available for download at <a href="http://itunes.apple.com/us/app/messenger-nasas-mission-to/id510144229?ls=1&mt=8"><span style="text-decoration: underline ; letter-spacing: 0.0px">http://itunes.apple.com/us/app/messenger-nasas-mission-to/id510144229?ls=1&mt=8</span>.</a></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">For more information on the MESSENGER mission, visit the MESSENGER home page: <a href="http://messenger.jhuapl.edu/"><span style="font: 12.0px Courier; text-decoration: underline ; letter-spacing: 0.0px; color: #3300ff">http://messenger.jhuapl.edu/</span></a>.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">* <b>Pack Your Backpack</b></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">Calling all explorers! Tour JPL with our new Virtual Field Trip site. Stops include Mission Control and the Rover Lab. Your guided tour starts when you select a "face" that will be yours throughout the visit. Cool space images and souvenirs are all included in your visit.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; color: rgb(51, 0, 255); "><span style="letter-spacing: 0.0px; color: #000000">+ <a href="http://virtualfieldtrip.jpl.nasa.gov/"><span style="text-decoration: underline ; letter-spacing: 0.0px">http://virtualfieldtrip.jpl.nasa.gov/</span></a> </span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">* Past, Present, Future and Proposed JPL Missions - <a href="http://www.jpl.nasa.gov/missions"><span style="font: 12.0px Courier; text-decoration: underline ; letter-spacing: 0.0px; color: #3300ff">http://www.jpl.nasa.gov/missions</span></a>.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; "><span style="letter-spacing: 0.0px">* For special JPL programs and presentations in your area visit the JPL Solar System Ambassador web site at <a href="http://www2.jpl.nasa.gov/ambassador/index.html"><span style="font: 12.0px Courier; text-decoration: underline ; letter-spacing: 0.0px; color: #3300ff">http://www2.jpl.nasa.gov/ambassador/index.html</span></a>.</span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; text-align: center; font: normal normal normal 24px/normal Courier; "><span style="letter-spacing: 0.0px"><b>Mars Missions</b></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"><b></b></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; text-align: center; font: normal normal normal 18px/normal Courier; color: rgb(31, 0, 172); "><span style="text-decoration: underline ; letter-spacing: 0.0px"><a href="http://beamartian.jpl.nasa.gov/welcome"><b><i>Be A Martian</i></b><span style="font: 18.0px Courier; text-decoration: underline ; letter-spacing: 0.0px; color: #1f00ac"><b><i></i></b></span></a></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; min-height: 14px; "><span style="letter-spacing: 0.0px"><b></b></span><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Courier; color: rgb(51, 0, 255); "><span style="font: 12.0px Helvetica; color: #000000"></span></div></body></html>