English

Small Bodies Science with Twinkle

Earth and Planetary Astrophysics 2019-09-20 v2 Instrumentation and Methods for Astrophysics

Abstract

Twinkle is an upcoming 0.45m space-based telescope equipped with a visible and two near-infrared spectrometers covering the spectral range 0.4 to 4.5{\mu}m with a resolving power R~250 ({\lambda}<2.42{\mu}m) and R~60 ({\lambda}>2.42{\mu}m). We explore Twinkle's capabilities for small bodies science and find that, given Twinkle's sensitivity, pointing stability, and spectral range, the mission can observe a large number of small bodies. The sensitivity of Twinkle is calculated and compared to the flux from an object of a given visible magnitude. The number, and brightness, of asteroids and comets that enter Twinkle's field of regard is studied over three time periods of up to a decade. We find that, over a decade, several thousand asteroids enter Twinkle's field of regard with a brightness and non-sidereal rate that will allow Twinkle to characterise them at the instrumentation's native resolution with SNR > 100. Hundreds of comets can also be observed. Therefore, Twinkle offers researchers the opportunity to contribute significantly to the field of Solar System small bodies research.

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Cite

@article{arxiv.1903.09840,
  title  = {Small Bodies Science with Twinkle},
  author = {Billy Edwards and Sean Lindsay and Giorgio Savini and Giovanna Tinetti and Claudio Arena and Neil Bowles and Marcell Tessenyi},
  journal= {arXiv preprint arXiv:1903.09840},
  year   = {2019}
}

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Published in JATIS

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