3I/ATLAS : Recently, scientists using the ATLAS survey telescope in Chile announced the detection of a new interstellar object, 3I/ATLAS.
o This marks just the third recorded instance of an interstellar object passing through our solar system, after 1I/ʻOumuamua in 2017 and 2I/Borisov in 2019.
o Appears reddish, with a spectral slope of 1.3% per 100 nm, hinting at complex organics or water ice.
o The nucleus is likely 10–30 km wide, larger than both ʻOumuamua and Borisov.
o Believed to be over 3 billion years old, possibly older than our solar system.
o Travels at an extremely high velocity of 57–68 km/s relative to the Sun.
o Trajectory simulations trace its path back to the constellation Sagittarius, indicating it came from outside our solar system.
o Objective: To detect and track small to medium-sized asteroids on collision courses with Earth, giving time to evacuate or respond if necessary.
o Key Features and Capabilities: Wide-Field Coverage: Each ATLAS Capable of detecting 100-meter asteroids days to weeks before impact and smaller ones hours to days ahead
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