Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
EP: Fachverband Extraterrestrische Physik
EP 7: Planets and Small Bodies III
EP 7.4: Vortrag
Mittwoch, 2. April 2025, 11:45–12:00, ZHG005
Investigating the activity of the disrupted asteroid 62412 (2000 SY178) — •Maria Mastropietro1,2, Oriel Humes1, Yoonyoung Kim3, and Jessica Agarwal1,2 — 1Institut für Geophysik und Extraterrestrische Physik, TU Braunschweig, Germany — 2Max Planck Institute for Solar System Research, Göttingen, Germany — 3Department of Earth, Planetary and Space Sciences, UCLA, Los Angeles, USA
Dust emission from asteroids is often attributed to sublimation of exposed ice, causing comet-like activity in main-belt comets, or disruption from impacts or fast rotation, which in some cases can also expose subsurface ice for sublimation.
Asteroid 62412 (2000 SY178) exhibited dust emission after its 2013 perihelion, likely due to rotational destabilization due to its nature as a fast rotator [1]. Our analysis of archival data and pre-2024 perihelion observations shows significant changes in the asteroid's lightcurve amplitude and brightness after the 2013 activity, indicating changes in its shape and size.
If confirmed, the absence of reactivation in later perihelion passages may result from a lack of exposed ice or low surface temperatures due to high perihelion distance (2.9 AU).
[1] Sheppard, S. S. & Trujillo, C. 2015, AJ, 149, 44
Keywords: data analysis; photometry; asteroids