In Kring's review, the Sinus Iridum mare basalt has modest titanium-ore content, except near its southeastern margin, where it has very high titanium-ore content.
Wait-and-see observations One interesting side story involves NASA's Lunar Atmosphere and Dust Environment Explorer (LADEE), which recently entered orbit around the moon.
Whether the LADEE spacecraft could detect certain activities of China's Chang'e 3 mission is worth contemplating, according to SPACE.com contacts familiar with LADEE operations.
Also in a wait-and-see mode regarding how China's lander/rover operations will perform is Arizona State University's Mark Robinson, the principal investigator for LRO's Lunar Reconnaissance Orbiter Camera, or LROC.
"If Chang'e 3 is successful, everyone is pointing to a north Sinus Iridum landing spot," Robinson told SPACE.com. "I keep seeing east central Sinus Iridium near Laplace A as the target -- nothing official."
Because that rumor has been floating about for more than a year, the LROC imaging team has made sure the camera has gotten the best possible coverage of the prospective landing locale, Robinson said. Before-and-after imaging is possible, he added, "and it will be fun to watch the rover move away from the lander, perhaps heading to Laplace A, which is a very spectacular crater."