Matches in SemOpenAlex for { <https://semopenalex.org/work/W4200630556> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W4200630556 abstract "Asteroid pairs are genetically related asteroids that recently separated ($<$few million years), but still reside on similar heliocentric orbits. A few hundred of these systems have been identified, primarily in the asteroid main-belt. Here we studied a newly discovered pair of near-Earth objects (NEOs): 2019 PR2 and 2019 QR6. Based on broadband photometry, we found these asteroids to be spectrally similar to D-types, a type rare amongst NEOs. We recovered astrometric observations for both asteroids from the Catalina Sky Survey from 2005, which significantly improved their fitted orbits. With these refinements we ran backwards orbital integrations to study formation and evolutionary history. We found that neither a pure gravitational model nor a model with the Yarkovsky effect could explain their current orbits. We thus implemented two models of comet-like non-gravitational forces based on water or CO sublimation. The first model assumed quasi-continuous, comet-like activity after separation, which suggested a formation time of the asteroid pair $300^{+120}_{-70}$ years ago. The second model assumed short-term activity for up to one heliocentric orbit ($sim$13.9 years) after separation, which suggested that the pair formed 272$pm$7 years ago. Image stacks showed no activity for 2019~PR2 during its last perihelion passage. These results strongly argue for a common origin that makes these objects the youngest asteroid pair known to date. Questions remain regarding whether these objects derived from a parent comet or asteroid, and how activity may have evolved since their separation." @default.
- W4200630556 created "2021-12-31" @default.
- W4200630556 creator A5001383991 @default.
- W4200630556 creator A5001875630 @default.
- W4200630556 creator A5001984963 @default.
- W4200630556 creator A5006574127 @default.
- W4200630556 creator A5011438263 @default.
- W4200630556 creator A5011973399 @default.
- W4200630556 creator A5024691939 @default.
- W4200630556 creator A5037076052 @default.
- W4200630556 creator A5046219720 @default.
- W4200630556 creator A5058133110 @default.
- W4200630556 creator A5059561004 @default.
- W4200630556 creator A5060121789 @default.
- W4200630556 creator A5062339548 @default.
- W4200630556 creator A5065959955 @default.
- W4200630556 creator A5075676088 @default.
- W4200630556 creator A5086939278 @default.
- W4200630556 date "2021-12-02" @default.
- W4200630556 modified "2023-10-12" @default.
- W4200630556 title "Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2 -- 2019 QR6" @default.
- W4200630556 hasPublicationYear "2021" @default.
- W4200630556 type Work @default.
- W4200630556 citedByCount "0" @default.
- W4200630556 crossrefType "posted-content" @default.
- W4200630556 hasAuthorship W4200630556A5001383991 @default.
- W4200630556 hasAuthorship W4200630556A5001875630 @default.
- W4200630556 hasAuthorship W4200630556A5001984963 @default.
- W4200630556 hasAuthorship W4200630556A5006574127 @default.
- W4200630556 hasAuthorship W4200630556A5011438263 @default.
- W4200630556 hasAuthorship W4200630556A5011973399 @default.
- W4200630556 hasAuthorship W4200630556A5024691939 @default.
- W4200630556 hasAuthorship W4200630556A5037076052 @default.
- W4200630556 hasAuthorship W4200630556A5046219720 @default.
- W4200630556 hasAuthorship W4200630556A5058133110 @default.
- W4200630556 hasAuthorship W4200630556A5059561004 @default.
- W4200630556 hasAuthorship W4200630556A5060121789 @default.
- W4200630556 hasAuthorship W4200630556A5062339548 @default.
- W4200630556 hasAuthorship W4200630556A5065959955 @default.
- W4200630556 hasAuthorship W4200630556A5075676088 @default.
- W4200630556 hasAuthorship W4200630556A5086939278 @default.
- W4200630556 hasBestOaLocation W42006305561 @default.
- W4200630556 hasConcept C121332964 @default.
- W4200630556 hasConcept C124017977 @default.
- W4200630556 hasConcept C1276947 @default.
- W4200630556 hasConcept C150846664 @default.
- W4200630556 hasConcept C44870925 @default.
- W4200630556 hasConcept C58142911 @default.
- W4200630556 hasConcept C68271606 @default.
- W4200630556 hasConcept C87355193 @default.
- W4200630556 hasConcept C93623110 @default.
- W4200630556 hasConcept C94081185 @default.
- W4200630556 hasConcept C97784730 @default.
- W4200630556 hasConceptScore W4200630556C121332964 @default.
- W4200630556 hasConceptScore W4200630556C124017977 @default.
- W4200630556 hasConceptScore W4200630556C1276947 @default.
- W4200630556 hasConceptScore W4200630556C150846664 @default.
- W4200630556 hasConceptScore W4200630556C44870925 @default.
- W4200630556 hasConceptScore W4200630556C58142911 @default.
- W4200630556 hasConceptScore W4200630556C68271606 @default.
- W4200630556 hasConceptScore W4200630556C87355193 @default.
- W4200630556 hasConceptScore W4200630556C93623110 @default.
- W4200630556 hasConceptScore W4200630556C94081185 @default.
- W4200630556 hasConceptScore W4200630556C97784730 @default.
- W4200630556 hasLocation W42006305561 @default.
- W4200630556 hasOpenAccess W4200630556 @default.
- W4200630556 hasPrimaryLocation W42006305561 @default.
- W4200630556 hasRelatedWork W1038735 @default.
- W4200630556 hasRelatedWork W14800816 @default.
- W4200630556 hasRelatedWork W22906486 @default.
- W4200630556 hasRelatedWork W2306624 @default.
- W4200630556 hasRelatedWork W26521586 @default.
- W4200630556 hasRelatedWork W28338975 @default.
- W4200630556 hasRelatedWork W37381998 @default.
- W4200630556 hasRelatedWork W50693641 @default.
- W4200630556 hasRelatedWork W8428918 @default.
- W4200630556 hasRelatedWork W8597733 @default.
- W4200630556 isParatext "false" @default.
- W4200630556 isRetracted "false" @default.
- W4200630556 workType "article" @default.