Asteroid activists launch fund-raising campaign for space telescope Ball Aerospace / B612 Foundation Ball Aerospace played a role in building the Spitzer Space Telescope (left) and Kepler planet-hunting probe (middle), and is in line to become the prime contractor for the proposed Sentinel Space Telescope (right). Leaders of the nonprofit B612 Foundation today took the wraps off a campaign to fund and launch a space telescope to hunt for potential killer asteroids - a campaign they portrayed as a cosmic civic improvement project. Former NASA astronaut Ed Lu, the foundation's chairman and CEO, estimated that hundreds of millions of dollars would have to be raised to fund the project, but said he was "confident we can do this." "We've been at this particular project for a year now," Lu told me in advance of today's campaign kickoff at the California Academy of Sciences' Morrison Planetarium in San Francisco. We have people who are internationally well-connected, and we have a message that we think resonates with people ranging from large donors to perhaps half a million kids worldwide. The foundation's aim is to identify and map the orbits of half a million asteroids that are on trajectories approaching Earth over the course of five and a half years, using a spacecraft that's launched into a Venus-type orbit on a SpaceX Falcon 9 rocket in the 2017-2018 time frame. Apollo astronaut Rusty Schweickart, B612's chairman emeritus, said the task could be key to humanity's long-term survival. "We feel a certain urgency to get on with it so that we can be confident that we're not going to have a cosmic disaster here for no good, justifiable reason, just because we didn't get with it," he said in a statement. So let's get with it. That's the name of the game. What's the risk? The potential risk posed by near-Earth asteroids was highlighted earlier this month when a kilometer-wide (0.6-mile-wide) asteroid called 2012 LZ1 sailed within 3.3 million miles (5.3 kilometers) of our planet, just a few days after its discovery. If a rock that big were to hit Earth, it could end civilization as we know it. Smaller asteroids, around 40 meters (130 feet) in diameter, could set off atom-bomb-scale explosions like the 1908 Tunguska impact, which flattened 500,000 acres (2,000 square kilometers) of forest in Siberia. Ground-based telescopes and space probes such as the NASA's now-defunct Wide-field Infrared Survey Explorer have found thousands of near-Earth asteroids, including an estimated 90 percent of the planet-killers measuring a kilometer or more wide. But there are hundreds of thousands more yet to be found in the Tunguska-or-bigger range. The B612 Foundation, which takes its name from the asteroid that was home to the main character in a children's book titled "The Little Prince," was formed in 2002 to advocate strategies for deflecting potentially hazardous asteroids. A little more than a year ago, the foundation decided to shift its focus to mapping the inner solar system. "Over the years it became clear that deflecting asteroids is a solvable technical problem as long as there is adequate early warning (decades of notice)," the foundation said in a briefing paper. It also became clear that the job of tracking asteroids to provide early warning was not going to be accomplished by others in a timely fashion. What's the mission? To track more asteroids, the foundation proposes launching the Sentinel Space Telescope, a 1.5-ton, 25-foot-tall (7.7-meter-tall) observatory that draws upon design features from NASA's Spitzer Space Telescope and Kepler planet-hunting probe. Ball Aerospace was involved in both those earlier space projects, and would be the prime contractor for the Sentinel. The craft would carry a 20-inch (50-centimeter) telescope with an infrared imager. Lu said the telescope's design has been nearly completed under the leadership of mission director Harold Reitsema, an astronomer who recently retired from Ball Aerospace. Negotiations are currently under way with Ball Aerospace on a fixed-price contract to build the Sentinel, Lu said. He declined to be specific on the mission cost because of those negotiations. The mission plan calls for the craft to be launched on a Falcon 9 into a slightly elliptical orbit between Earth and Venus. From that vantage point, the Sentinel could look out toward the vicinity of Earth's orbit with the sun behind it - which would be ideal for spotting space rocks like 2012 LZ1. Image data would be beamed down to NASA's Deep Space Network and passed along to the mission's data operations center at the Laboratory for Space Physics in Boulder, Colo. Newly identified asteroids would be reported to the International Astronomical Union's Minor Planet Center, in accordance with existing procedures, and the orbital data would be analyzed by NASA's Jet Propulsion Laboratory to assess potential hazards. The B612 Foundation said it signed a Space Act Agreement with NASA on June 19 in support of the mission. The foundation has also been in contact with SpaceX's engineers to discuss technical details for the anticipated launch, Lu said. What are the chances? The fund-raising challenge could be as daunting as the challenges associated with spacecraft development. But Lu said the success of SpaceX's commercial resupply mission last month boosted his confidence that a non-governmental space effort could be successful. After his 2007 retirement from NASA's astronaut corps, Lu worked for three years as a Google executive, and he was inspired to go forward with the Sentinel project when he returned to Google's Silicon Valley headquarters to give a talk. "I told them the essential problem was that nobody is mapping the asteroids," he recalled. One of the guys there said, 'Why don't you just go and do it?' ... And then we said, 'Hey, maybe we can.' It was eye-opening to me to see how commonplace these types of fund-raising projects are. Lu pointed out that the estimated cost of the mission, amounting to a few hundred million dollars, was comparable to the cost of building a performing arts center, a museum, or a planetarium like the one where today's briefing was being held. The San Francisco Museum of Modern Art, for example, has raised more than $437 million in its current capital campaign. "There are 50 to 100 projects larger than ours going on at any time in the United States, and nobody bats an eye," he said. He also recalled that many of the world's best-known observatories, including the Palomar Observatory, the Lick Observatory and the Keck Observatory, were built with private financing. "I think of this as following in the precedent of large ground-based telescopes, from a funding standpoint," Lu said. It would be nearly unprecedented, however, to mount a space mission exclusively with private donations. The nonprofit Planetary Society and Cosmos Studios tried to do so in 2005 when they financed the launch of the Cosmos 1 solar sail on a Russian submarine missile - but that $4 million mission failed, and the follow-up LightSail 1 mission has not yet been launched. The B612 Foundation's list of directors and advisers include some well-known names in the fields of fund-raising and venture capital, such as Dick Bingham, Geoff Baehr, Esther Dyson, Alexander Galitsky and Steve Jurvetson. Other members of the "B612 Founders Circle" include Google senior vice president Alan Eustace, Broadcom President/CEO Scott McGregor and Reddit CEO Yishan Wong. In the end, fund-raising power may be as essential for the Sentinel's successful liftoff as SpaceX's Falcon 9 rocket.