Terry H. Bressi

SPACEWATCH®: Following up Near-Earth Objects (NEOs) to help Determine their Orbits

Cassandra Lejoly, Melissa J. Brucker, Robert Stanton McMillan, Terry H. Bressi et autres

An impact by an asteroid or comet onto the Earth is one of the few natural disasters that can be predicted in advance and that we have the tools to prevent. Without sufficient follow-up observations during their discovery apparitions, NEOs often accrue …

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Apophis Planetary Defense Campaign

Vishnu Reddy, Michael S. P. Kelley, Jessie Dotson, Davide Farnocchia et autres

Abstract We describe results of a planetary defense exercise conducted during the close approach to Earth by the near-Earth asteroid (99942) Apophis during 2020 December–2021 March. The planetary defense community has been conducting observational campaigns since 2017 to test the operational readiness …

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Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2–2019 QR6

Petr Fatka, Nicholas Moskovitz, Petr Pravec, M. Micheli et autres

ABSTRACT Asteroid pairs are genetically related asteroids that recently separated (

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Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2 -- 2019 QR6

Petr Fatka, Nicholas Moskovitz, Petr Pravec, M. Micheli et autres

Asteroid pairs are genetically related asteroids that recently separated ($<$few million years), but still reside on similar heliocentric orbits. A few hundred of these systems have been identified, primarily in the asteroid main-belt. Here we studied a newly discovered pair of near-Earth …

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SPACEWATCH® Astrometry of Near-Earth Objects with Larger Telescopes

Melissa J. Brucker, Robert Stanton McMillan, Terry H. Bressi, Jeffrey A. Larsen et autres

Update on Spacewatch Observations of Near-Earth Objects

Melissa J. Brucker, Robert Stanton McMillan, Terry H. Bressi, J. A. Larsen et autres

Astrometry and Photometry of Faint, High Priority Solar System Objects

Robert Stanton McMillan, J. A. Larsen, J. V. Scotti, Terry H. Bressi et autres

The Pan-STARRS Moving Object Processing System

L. Denneau, Robert Jedicke, T. Grav, Mikael Granvik et autres

We describe the Pan-STARRS Moving Object Processing System (MOPS), a modern software package that produces automatic asteroid discoveries and identifications from catalogs of transient detections from next-generation astronomical survey telescopes. MOPS achieves >99.5% efficiency in producing orbits from a synthetic but realistic …

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