Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2-2019 QR6
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00555905" target="_blank" >RIV/67985815:_____/22:00555905 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/stab3719" target="_blank" >https://doi.org/10.1093/mnras/stab3719</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stab3719" target="_blank" >10.1093/mnras/stab3719</a>
Alternative languages
Result language
angličtina
Original language name
Recent formation and likely cometary activity of near-Earth asteroid pair 2019 PR2-2019 QR6
Original language description
We studied a newly discovered pair of near-Earth objects (NEOs): 2019 PR2 and 2019 QR6. Based on broad-band 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(-70)(+120) yr ago. The second model assumed short-term activity for up to one heliocentric orbit (similar to 13.9 yr) after separation, which suggested that the pair formed 272 +/- 7 yr 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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA20-04431S" target="_blank" >GA20-04431S: Physical and dynamical properties of space mission target asteroids, and their evolutionary paths</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
510
Issue of the periodical within the volume
4
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
6033-6049
UT code for WoS article
000764893300001
EID of the result in the Scopus database
2-s2.0-85125129326