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  The 2016 Reactivations of the Main-belt Comets 238P/Read and 288P/(300163) 2006 VW139

Hsieh, H. H., Ishiguro, M., Kim, Y., Knight, M. M., Lin, Z.-Y., Micheli, M., et al. (2018). The 2016 Reactivations of the Main-belt Comets 238P/Read and 288P/(300163) 2006 VW139. The Astronomical Journal, 156(5): 223. doi:10.3847/1538-3881/aae528.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-C2B2-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-D0AA-2
Genre: Journal Article
Other : The 2016 Reactivations of the Main-belt Comets 238P/Read and 288P/(300163) 2006 VW139

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 Creators:
Hsieh, Henry H., Author
Ishiguro, Masateru1, Author
Kim, Yoonyoung2, Author              
Knight, Matthew M., Author
Lin, Zhong-Yi, Author
Micheli, Marco, Author
Moskovitz, Nicholas A., Author
Sheppard, Scott S., Author
Thirouin, Audrey, Author
Trujillo, Chadwick A., Author
Affiliations:
1Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1125546              
2Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1832288              

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Free keywords: comets: general; comets: individual (238P, 288P) ; minor planets, asteroids: general
 Abstract: We report on the confirmation and monitoring of recurrent activity for main-belt comets (MBCs) 238P/Read and 288P/(300163) 2006 VW139 in 2016 (cf. Agarwal et al. 2016, CBET 4306; Hsieh et al. 2016, CBET 4307), as well as the identification of activity for 288P in Sloan Digital Sky Survey images from November 2000. We will also report on the confirmation of recurrent activity in 2017 (Hsieh et al. 2017, CBET 4388) and the progress of the ongoing monitoring campaign (April 2017 through December 2017) that we are conducting for MBC 259P/Garradd. With these observations, 238P and 288P have now each been observed to be active on three separate orbit passages with intervening periods of inactivity and 259P has been observed to be active on two separate orbit passages, firmly establishing the cometary (i.e., sublimation-driven) nature of their activity. We are currently conducting a multi-facility observing campaign to monitor the photometric and morphological evolution of these objects, using the Canada-France-Hawaii Telescope, the Gemini North and South telescopes (under a Gemini Large and Long Program), the Magellan telescopes, the Discovery Channel Telescope, and the Lulin One-meter Telescope. During their most recent perihelion encounters, 238P was observed to be active as early as 2016 July 8 at a true anomaly of 329 degrees, 288P was observed to be active as early as 2016 June 8 at a true anomaly of 318 degrees, and 259P was observed to be active as early at 2017 April 26 at a true anomaly of 315 degrees. We also report on the results of numerical modeling analyses of the morphological evolution of all three objects aimed at assessing both the properties of their current active episodes and changes in activity strength from one epoch to the next to help constrain the active lifetimes of MBCs, a key parameter for inferring the total number of MBCs in the asteroid belt from survey results. This work was supported by the NASA Solar System Observations program under Grant NNX16AD68G

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Language(s): eng - English
 Dates: 2018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-3881/aae528
Other: 2017DPS....4930510H
 Degree: -

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Title: The Astronomical Journal
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 156 (5) Sequence Number: 223 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_4