Twilight Zone! NASA hunts dangerous asteroids hidden in this blinding space; finds many city killers

tech.hindustantimes.com:

Nasa's Planetary Defense Coordination Office monitors the sky with telescopes and keeps a track of prominent upcoming flybys by asteroids and other space objects. However, despite this continuous monitoring, there are some potentially dangerous asteroids that remain hidden. Reason? They remain hidden due to the sun's glare. NASA telescopes are blinded by the Sun and therefore, cannot spot these dangerous asteroids. So, they have looked to hunt them in the Twilight zone. Dangerous they may seem, but astronomer Scott Sheppard, from the Carnegie Institution for Science in Washington DC, suggests that the asteroids lurking between Earth and the sun may help scientists to shed light on the history of the solar system. Sheppard explained that these asteroids remain undiscovered as telescopes tend to look away from our planet so that they can avoid the sun's glare. However, new surveys peering in the other direction are discovering more NEOs and some of them are never-before-seen asteroids.

"New telescopic surveys are braving the Sun's glare and searching for asteroids toward the Sun during twilight," wrote Sheppard in a column in the latest Science journal. As shared, the findings include the first asteroid with an orbit interior to Venus named 'Aylochaxnim 2020 AV2, as well as the asteroid 2021 PH27 with the shortest-known orbital period around the Sun. Some of these are "city-killers," asteroids. They are large enough to impact Earth severely.

Sheppard is running the twilight survey using the Dark Energy Camera (DECam) on the Víctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory (CTIO) in Chile to observe a previously hidden world of asteroids that have been hidden due to the sun's glare.

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