标题： 在准希尔达木星族彗星362P/(457175) 2008 GO98上发现的周期性彗星活动 显示英文标题

标题： Recurrent Cometary Activity Discovered on Quasi-Hilda Jupiter Family Comet 362P/(457175) 2008 GO98

摘要： 我们报告了准希达彗星（QHC）362P/(457175) 2008 GO98上的重复活动。第一次活动时期是在362P的近日点通过期间发现的。第一次活动时期是在2016年的近日点期间发现的（Garcia-Migani & Gil-Hutton 2018），因此我们受到激励，在其下一次近日点通过期间（UT 2024年7月20日）对其进行观测，以寻找重复的彗星活动。我们使用 Lowell Discovery Telescope（LDT）、Astrophysical Research Consortium（ARC）望远镜和Vatican Advanced Technology Telescope（VATT）进行了观测，并在362P的真实纬度（v）早至318.1度时识别出第二次活动时期。我们对多个档案库进行了搜索，并识别出使用加拿大-法国-夏威夷望远镜（CFHT）MegaCam、暗能量相机（DECam）、Pan-STARRS 1、SkyMapper、Zwicky Transient Facility（ZTF）和Las Cumbres Observatory Global Telescope（LCOGT）网络数据获得的图像。利用这些数据，我们识别出一个此前未报告的时间段内的活动，并且当362P远离近日点时，即83度 < v < 318度时，没有检测到活动。在近日点附近检测到活动而远离近日点时没有活动，表明这是由热驱动的活动和挥发物升华引起的。我们的动力学模拟表明，362P是一个QHC，并且在未来1千年内它将保持在木星族彗星（JFC）和准希达轨道的结合状态，尽管在这一时间段结束时它将变得越来越混乱。我们的反向模拟表明，362P可能从长周期彗星（约53%）或半人马座（约32%）的轨道迁移而来，否则在过去100千年中它一直是一个JFC（约15%）。我们建议社区继续对362P进行额外的望远镜观测，因为362P正在UT 2024年7月20日后离开近日点，同时继续观测第三次活动时期。 显示英文摘要

摘要： We report the discovery of recurrent activity on quasi-Hilda comet (QHC) 362P/(457175) 2008 GO98. The first activity epoch was discovered during the perihelion passage of 362P. The first activity epoch was discovered during the perihelion in 2016 (Garcia-Migani & Gil-Hutton 2018), so we were motivated to observe it for recurrent cometary activity near its next perihelion passage (UT 2024 July 20). We obtained observations with the Lowell Discovery Telescope (LDT), the Astrophysical Research Consortium (ARC) telescope, and the Vatican Advanced Technology Telescope (VATT) and identified a second activity epoch when 362P had a true anomaly (v) as early as 318.1 deg. We conducted archival searches of numerous repositories and identified images obtained with Canada-France-Hawaii Telescope (CFHT) MegaCam, Dark Energy Camera (DECam), Pan-STARRS 1, SkyMapper, Zwicky Transient Facility (ZTF), and Las Cumbres Observatory Global Telescope (LCOGT) network data. Using these data, we identified activity from a previously unreported timespan, and we did not detect activity when 362P was away from perihelion, specifically 83 deg < v < 318 deg. Detection of activity near perihelion and absence of activity away from perihelion suggest thermally-driven activity and volatile sublimation. Our dynamical simulations suggest 362P is a QHC and it will remain in a combined Jupiter-family comet (JFC) and quasi-Hilda orbit over the next 1 kyr, though it will become increasingly chaotic nearing the end of this timeframe. Our backward simulations suggest 362P may have migrated from the orbit of a Long Period Comet (~53%) or Centaur (~32%), otherwise it remained a JFC (~15%) over the previous 100 kyr. We recommend additional telescope observations from the community as 362P continues outbound from its perihelion on UT 2024 July 20, as well as continued observations for a third activity epoch.