4 Matching Annotations
  1. Dec 2018
    1. He noted that the asteroid Bennu — currently under scrutiny by NASA’s Osiris-REx space probe — has a very small chance of hitting Earth a couple of hundred years from now.

  2. Aug 2018
  3. Apr 2016
    1. n order to obtain an accurate estimate of true completion, and thus population, one must bias-correct the observed re-detection ratio to estimate the true completion as a function of size of asteroid. We do this with a computer model simulating actual surveys.
    1. "Using visible wavelengths of light, it is difficult to tell if an asteroid is big and dark, or bright and small, because both combinations reflect the same amount of light," said Carrie Nugent, a NEOWISE scientist at the Infrared Processing and Analysis Center at California Institute of Technology, in Pasadena. "But when you look at an asteroid in the infrared with NEOWISE, the amount of infrared light corresponds with how big the asteroid is, and with some thermal models on a computer, you can figure out how big the asteroids are."