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Observational Strategy for the NSOS-α, Korea’s Near-Earth Asteroid Survey Telescope, Inspired by CSS Approaches

Presentation #404.07 in the session Asteroids: Observational Surveys (Poster)

Published onOct 23, 2023
Observational Strategy for the NSOS-α, Korea’s Near-Earth Asteroid Survey Telescope, Inspired by CSS Approaches

In a concerted effort to discover and monitor Near-Earth Asteroids, particularly Potentially Hazardous Asteroids (PHAs), the Korea Astronomy and Space Science Institute (KASI) plans to install the Near Space Optical Survey-alpha (NSOS-α) telescope, a 1.5 m aperture wide field telescope, at the Cerro Tololo International Observatory (CTIO) in Chile. The preliminary design of the telescope was completed in 2022, in collaboration with the National Optical-Infrared Astronomy Research Laboratory (NOIRLab). The contract for the telescope’s construction is currently in place, with projected completion by the end of 2026. Substantive observational operations are scheduled to commence in the subsequent year.

The NSOS-α telescope will be located within a similar longitude band to that of the already successfully operating Catalina Sky Survey (CSS) in Arizona. We have been collaborating closely with and seeking advice from the CSS team since the design stage, and we anticipate synergistic benefits between NSOS-α and CSS upon the completion of the telescope. In this presentation, we aim to examine the characteristics of Near-Earth Asteroids discovered thus far by CSS’s observational methods, and discuss the observational strategies of NSOS-α to maximize PHA detection based on these findings. Furthermore, we will explore potential mutual benefits between the NSOS-α and the Vera C. Rubin Observatory, which is set to commence comprehensive surveys of the southern sky in 2024.

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