Asteroids 87887-415992: the youngest known asteroid pair?
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10331720" target="_blank" >RIV/00216208:11320/16:10331720 - isvavai.cz</a>
Alternative codes found
RIV/67985815:_____/16:00470106
Result on the web
<a href="http://dx.doi.org/10.1051/0004-6361/201629290" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201629290</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/201629290" target="_blank" >10.1051/0004-6361/201629290</a>
Alternative languages
Result language
angličtina
Original language name
Asteroids 87887-415992: the youngest known asteroid pair?
Original language description
Context. Pairs of asteroids, that is, couples of single bodies on tightly similar heliocentric orbits, were recently postulated as a new category of objects in the solar system. They are believed to be close twins to binary and multiple systems. Aims. Ages of the known pairs range from about 15 kyr to nearly a million years. Beyond the upper limit, the pairs disperse in the background population of asteroids and become difficult to detect. Below the lower limit, the pairs should be easily recognizable if they exist and are discovered by surveys. Using the available data, we analyze the possible existence of very young asteroid pairs with clearly proven ages <= 10 kyr. Methods. We searched for candidate very young asteroid pairs in the current catalog of asteroid orbits. After a preliminary analysis, we selected the most promising case of the small asteroids (87887) 2000 SS286 and (415992) 2002 AT49. We collected photometric observations to determine their rotation periods and absolute magnitudes. Results. The rotation period of (87887) 2000 SS286 is 5.7773 +/- 0.0004 h. HR = 14.99 +/- 0.04 and HR = 16.24 +/- 0.03 for the primary and secondary components. A transformation to the visible band provides H = 15.44 +/- 0.05 and H = 16.69 +/- 0.04. These two asteroids experienced a very close encounter, probably a formation event, some 7.4 +/- 0.3 kyr ago. The formal extension of our numerical runs backward in time reveal that these close encounters may have continued, starting from similar or equal to 45 kyr ago. However, based on tests using synthetic fission events, we argue that the older age solutions might be the true solution only at similar or equal to (10 15)% level, assuming their low initial separation velocity is of between 10-20 cm s(-1). This means that 87887-415992 probably is the youngest known asteroid pair in our dataset with a reliable determined age.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP209%2F12%2F0229" target="_blank" >GAP209/12/0229: Study of non-gravitational asteroid evolution processes via photometric observations</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy and Astrophysics [online]
ISSN
1432-0746
e-ISSN
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Volume of the periodical
595
Issue of the periodical within the volume
říjen
Country of publishing house
PL - POLAND
Number of pages
11
Pages from-to
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UT code for WoS article
000388573500127
EID of the result in the Scopus database
2-s2.0-84993993140