Abstract We report our discovery of cometary activity in the form of a diffuse tail associated with minor planet 2008 QZ44during two previous orbits: 2008 and 2017. This finding was prompted in part byActive Asteroids, ourZooniverse-hosted NASA Partner Citizen Science program. Participants flagged two UT 2017 July 12 Dark Energy Camera images of 2008 QZ44as active. Independently, our team identified activity in nine Canada-France-Hawaii Telescope MegaPrime images from UT 2008 November 20. During both apparitions 2008 QZ44was near its perihelion passage. 2008 QZ44has a Tisserand parameter with respect to Jupiter of 2.821, placing it in the Jupiter-family comet (JFC) class, and our dynamical integrations confirm this classification. JFCs contain primordial material that informs us about solar system evolution, and help us map the present-day volatile distribution. We note that 2008 QZ44has previously been classified as a quasi-Hilda comet candidate.
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Citizen Science Discovery of a Recurrently Active Jupiter-Family Comet: (551023) 2012 UQ192
Abstract We have discovered evidence of cometary activity originating from (551023) 2012 UQ192(alternately designated 2019 SN40), which we dynamically classify as a Jupiter Family Comet (JFC). JFCs have eccentric Jupiter-crossing orbits and originate in the Kuiper Belt. Analysis of these objects can provide vital information about minor planets in the outer solar system, such as the distribution of volatiles within the solar system. Activity on 2012 UQ192was first recognized by volunteers on our NASA Partner Citizen Science projectActive Asteroids. Through our own examination of archival image data, we found a total of ∼30 images presenting strong evidence of activity near perihelion during two separate orbits. 2012 UQ192is notable as we found it to be recurrently active. When 2012 UQ192approaches its perihelion passage in 2027 September, we predict it will reactivate and will be a prime subject for follow-up observations.
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- Award ID(s):
- 1950901
- PAR ID:
- 10497429
- Publisher / Repository:
- IOP
- Date Published:
- Journal Name:
- Research Notes of the AAS
- Volume:
- 7
- Issue:
- 12
- ISSN:
- 2515-5172
- Page Range / eLocation ID:
- 257
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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