Issue |
A&A
Volume 616, August 2018
|
|
---|---|---|
Article Number | A54 | |
Number of page(s) | 7 | |
Section | Planets and planetary systems | |
DOI | https://doi.org/10.1051/0004-6361/201832761 | |
Published online | 15 August 2018 |
Nucleus of active asteroid 358P/Pan-STARRS (P/2012 T1)
1
Max Planck Institute for Solar System Research,
Justus-von-Liebig-Weg 3,
37077
Göttingen,
Germany
e-mail: agarwal@mps.mpg.de
2
Lowell Observatory,
1400 W Mars Hill Rd,
Flagstaff,
AZ 86001,
USA
3
Department of Physics and Astronomy, Northern Arizona University,
PO Box 6010,
Flagstaff,
AZ 86011,
USA
Received:
2
February
2018
Accepted:
17
May
2018
Context. The dust emission from active asteroids is likely driven by collisions, fast rotation, sublimation of embedded ice, and combinations of these. Characterising these processes leads to a better understanding of their respective influence on the evolution of the asteroid population.
Aims. We study the role of fast rotation in the active asteroid 358P (P 2012/T1).
Methods. We obtained two nights of deep imaging of 358P with SOAR/Goodman and VLT/FORS2. We derived the rotational light curve from time-resolved photometry and searched for large fragments and debris >8 mm in a stacked, ultra-deep image.
Results. The nucleus has an absolute magnitude of mR = 19.68, corresponding to a diameter of 530 m for standard assumptions on the albedo and phase function of a C-type asteroid. We do not detect fragments or debris that would require fast rotation to reduce surface gravity to facilitate their escape. The 10-h light curve does not show an unambiguous periodicity.
Key words: minor planets / asteroids: individual: 358P
© ESO 2018
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.