Physical characterization of asteroid (16583) Oersted combining stellar occultation and photometric data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10511118" target="_blank" >RIV/00216208:11320/25:10511118 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=oFzkysXiQh" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=oFzkysXiQh</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202556313" target="_blank" >10.1051/0004-6361/202556313</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Physical characterization of asteroid (16583) Oersted combining stellar occultation and photometric data

Popis výsledku v původním jazyce

Context. We report a successful observation of a stellar occultation by asteroid (16583) Oersted, which provides a detailed physical characterization of its shape, spin state, and surface properties. Aims. Our goal is to determine the physical parameters of Oersted by combining multi-chord occultation timing, sparse optical photometry, and thermal infrared observations. Asteroids of this size (similar to 20 km) are rarely modeled in such detail due to observational limitations, making Oersted a valuable case study. Methods. We applied convex light curve inversion to sparse photometric data to derive an initial shape and spin state. We then refined and scaled this model using non-convex shape modeling with the All-Data Asteroid Modelling (ADAM) algorithm, incorporating constraints from the occultation chord profile. Thermophysical modeling based on WISE thermal infrared fluxes was used to determine the asteroid&apos;s effective diameter, geometric albedo, and thermal inertia. Results. The non-convex shape model reveals localized surface concavities and provides a size estimate consistent with radiometric measurements. The derived thermal inertia is typical for asteroids of comparable size. Conclusions. This work demonstrates the effectiveness of combining stellar occultations, photometry, and thermal infrared data for asteroid modeling and highlights the valuable contributions of citizen scientists, who played a key role in capturing the occultation and constraining the profile of the asteroid.

Název v anglickém jazyce

Physical characterization of asteroid (16583) Oersted combining stellar occultation and photometric data

Popis výsledku anglicky

Context. We report a successful observation of a stellar occultation by asteroid (16583) Oersted, which provides a detailed physical characterization of its shape, spin state, and surface properties. Aims. Our goal is to determine the physical parameters of Oersted by combining multi-chord occultation timing, sparse optical photometry, and thermal infrared observations. Asteroids of this size (similar to 20 km) are rarely modeled in such detail due to observational limitations, making Oersted a valuable case study. Methods. We applied convex light curve inversion to sparse photometric data to derive an initial shape and spin state. We then refined and scaled this model using non-convex shape modeling with the All-Data Asteroid Modelling (ADAM) algorithm, incorporating constraints from the occultation chord profile. Thermophysical modeling based on WISE thermal infrared fluxes was used to determine the asteroid&apos;s effective diameter, geometric albedo, and thermal inertia. Results. The non-convex shape model reveals localized surface concavities and provides a size estimate consistent with radiometric measurements. The derived thermal inertia is typical for asteroids of comparable size. Conclusions. This work demonstrates the effectiveness of combining stellar occultations, photometry, and thermal infrared data for asteroid modeling and highlights the valuable contributions of citizen scientists, who played a key role in capturing the occultation and constraining the profile of the asteroid.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GA22-17783S" target="_blank" >GA22-17783S: V množství je síla - Využití sítě dalekohledů Unistellar eVscope občanských vědců pro studium planetek</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy &amp; Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

704

Číslo periodika v rámci svazku

prosinec

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

8

Strana od-do

A67

Kód UT WoS článku

001633255500008

EID výsledku v databázi Scopus

2-s2.0-105024756622