By Soulskill from Slashdot's everybody-wave department
An anonymous reader writes "Asteroid 1998 QE2 has an estimated diameter of 2.7 km. This asteroid will have a close approach with Earth at about 15.2 LD (Lunar Distances = ~384,000 kilometers) or 0.0392 AU (1 AU = ~150 million kilometers) at 2059 UT on 2013 May 31 and it will reach the peak magnitude ~10.8 on May 31 around 2300 UT."
Radar images of the asteroid taken Wednesday show that 1998 QE2 has its own tiny moon
, about 600 meters wide. Phil Plait explained how the images were taken, and what further information we gleaned from them
. 'The very presence of the moon is a good thing. By measuring how long it takes to go around the primary, the mass of the primary can be found using math known for centuries (the more massive the big asteroid, the faster the moon will go around it at a given distance). We also know the size of the primary, so that means we can find its density, and therefore what it’s made of (probably mostly rock).'Read Replies (0)
By Soulskill from Slashdot's applying-a-sepia-filter-to-your-breakfast-is-a-fundamental-human-right department
An anonymous reader writes "A report at SF Gate notes that 'The United States has lifted portions of two-decades-old sanctions against Iran in an effort to bolster communication between the country's citizens — and potentially aid organization against a repressive Iranian government. Thursday afternoon the U.S. Treasury Department's Office of Foreign Assets Control authorized the sale of hardware and software that pertain to the Internet, instant messaging, chat, e-mail, social networking, sharing of media, and blogging — basically, all things digital. The Treasury Department wrote, 'As the Iranian government attempts to silence its people by cutting off their communication with each other and the rest of the world, the United States will continue to take action to help the Iranian people exercise their universal human rights, including the right to freedom of expression.'"Read Replies (0)