Spaceflight Insider

Launch of exoplanet-hunting TESS satellite delayed to Wednesday

The launch of TESS atop a Falcon 9 rocket has been postponed at least 48 hours. Photo Credit: Michael Howard / SpaceFlight Insider

The launch of TESS atop a Falcon 9 rocket has been postponed by at least 48 hours. Photo Credit: Michael Howard / SpaceFlight Insider

CAPE CANAVERAL, Fla. — The launch of NASA’s Transiting Exoplanet Survey Spacecraft (TESS) has been postponed by at least 48 hours, according to SpaceX. The satellite had been scheduled to launch atop a Falcon 9 rocket at 6:32 p.m. EDT (22:23 GMT) April 16, 2018.

“Standing down today to conduct additional GNC analysis, and teams are now working towards a targeted launch of @NASA_TESS on Wednesday, April 18,” SpaceX tweeted in a statement.

GNC stands for guidance, navigation and control and SpaceX did not say whether this postponement stems from a potential hardware failure, or if the company is just being extra vigilant. In a statement from NASA, the space agency said the TESS spacecraft is: “in excellent health, and remains ready for launch.”

Should SpaceX and NASA attempt to launch TESS on Wednesday, April 18, the targeted time for liftoff is expected to be 6:51 p.m. EDT (22:51 GMT). The Falcon 9 will fly out of Cape Canaveral Air Force Station’s Space Launch Complex 40.

When the mission does get underway, TESS will survey 85 percent of the sky for two years to hunt for exoplanets within about 300 light-years from Earth. After the Falcon 9’s second stage delivers the spacecraft into an elliptical orbit around Earth, the spacecraft will use onboard thrusters, and a gravity assist from the Moon, to position itself into a special 2:1 lunar resonance orbit high above Earth. This means the observatory will orbit the planet twice for every time the Moon orbits once.




Derek Richardson has a degree in mass media, with an emphasis in contemporary journalism, from Washburn University in Topeka, Kansas. While at Washburn, he was the managing editor of the student run newspaper, the Washburn Review. He also has a blog about the International Space Station, called Orbital Velocity. He met with members of the SpaceFlight Insider team during the flight of a United Launch Alliance Atlas V 551 rocket with the MUOS-4 satellite. Richardson joined our team shortly thereafter. His passion for space ignited when he watched Space Shuttle Discovery launch into space Oct. 29, 1998. Today, this fervor has accelerated toward orbit and shows no signs of slowing down. After dabbling in math and engineering courses in college, he soon realized his true calling was communicating to others about space. Since joining SpaceFlight Insider in 2015, Richardson has worked to increase the quality of our content, eventually becoming our managing editor. @TheSpaceWriter

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