Stellar occultation observations of (38628) Huya and its satellite: A detailed look into the system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00617660" target="_blank" >RIV/67985815:_____/25:00617660 - isvavai.cz</a>
Alternative codes found
RIV/47813059:19630/25:A0000481 RIV/00216208:11320/25:10511220
Result on the web
<a href="https://hdl.handle.net/11104/0366063" target="_blank" >https://hdl.handle.net/11104/0366063</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/PSJ/adabc1" target="_blank" >10.3847/PSJ/adabc1</a>
Alternative languages
Result language
angličtina
Original language name
Stellar occultation observations of (38628) Huya and its satellite: A detailed look into the system
Original language description
The physical and orbital parameters of trans-Neptunian objects provide valuable information about the solar system's formation and evolution. In particular, the characterization of binaries provides insights into the formation mechanisms that may be playing a role at such large distances from the Sun. Studies show two distinct populations, and (38628) Huya occupies an intermediate position between the unequal-sized binaries and those with components of roughly equal sizes. In this work, we predicted and observed three stellar occultation events by Huya. Huya and its satellitewere detected during occultations in 2021 March and again in 2023 June. Additionally, an attempt to detect Huya in 2023 February resulted in an additional single-chord detection of the secondary. A spherical body with a minimum diameter of D = 165 km can explain the three single-chord observations and provide a lower limit for the satellite size. The astrometry of Huya's system, as derived from the occultations and supplemented by observations from the Hubble Space Telescope and Keck Observatory, provided constraints on the satellite orbit and the mass of the system. Therefore, assuming the secondary is in an equatorial orbit around the primary, the limb fitting was constrained by the satellite orbit position angle. The system density, calculated by summing the most precise measurement of Huya's volume to the spherical satellite average volume, is rho 1 = 1073 +/- 66 kg m-3. The density that the object would have assuming a Maclaurin equilibrium shape with a rotational period of 6.725 +/- 0.01 hr is rho 2 = 768 +/- 42 kg m-3. This difference rules out the Maclaurin equilibrium assumption for the main body shape.
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
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
The Planetary Science Journal
ISSN
2632-3338
e-ISSN
2632-3338
Volume of the periodical
6
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
21
Pages from-to
48
UT code for WoS article
001427564600001
EID of the result in the Scopus database
2-s2.0-85219334494