Physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00600295" target="_blank" >RIV/67985815:_____/24:00600295 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0357676" target="_blank" >https://hdl.handle.net/11104/0357676</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/PSJ/ad7814" target="_blank" >10.3847/PSJ/ad7814</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira

Popis výsledku v původním jazyce

We report physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira. Using S-band (2380 MHz, 12.6 cm) radar observations from the Arecibo Observatory and several epochs of lightcurve observations from 2003 to 2019 with SHAPE modeling software, we determine the shape, size, rotational period, and mutual orbit of the primary and secondary components and the density of the primary component. We confirm the primary's sidereal rotation period to be 3.398521 +/- 0.000003 hr, and we find a likely spin axis orientation of ecliptic longitude and latitude (187 degrees,53 degrees) +/- 12 degrees. We find the primary's volume-equivalent diameter to be 4.92 +/- 0.95 km and the secondary's volume-equivalent diameter to be 0.80 +/- 0.30 km. We find the primary component's density to be 1.43 +/- 0.87 g cm-3. We also find that the secondary has a semimajor axis of 7.8 +/- 0.5 km and a sidereal orbital period of 15.577 +/- 0.003 hr based on orbital calculations using delay and Doppler offsets between the primary and secondary and the timing of mutual events observed in lightcurve data. This work represents the first detailed analysis of the shape of an Atira-class asteroid.

Název v anglickém jazyce

Physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira

Popis výsledku anglicky

We report physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira. Using S-band (2380 MHz, 12.6 cm) radar observations from the Arecibo Observatory and several epochs of lightcurve observations from 2003 to 2019 with SHAPE modeling software, we determine the shape, size, rotational period, and mutual orbit of the primary and secondary components and the density of the primary component. We confirm the primary's sidereal rotation period to be 3.398521 +/- 0.000003 hr, and we find a likely spin axis orientation of ecliptic longitude and latitude (187 degrees,53 degrees) +/- 12 degrees. We find the primary's volume-equivalent diameter to be 4.92 +/- 0.95 km and the secondary's volume-equivalent diameter to be 0.80 +/- 0.30 km. We find the primary component's density to be 1.43 +/- 0.87 g cm-3. We also find that the secondary has a semimajor axis of 7.8 +/- 0.5 km and a sidereal orbital period of 15.577 +/- 0.003 hr based on orbital calculations using delay and Doppler offsets between the primary and secondary and the timing of mutual events observed in lightcurve data. This work represents the first detailed analysis of the shape of an Atira-class 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/GA23-04946S" target="_blank" >GA23-04946S: Studium vývojových drah asteroidů řízených negravitačními silami pomocí fotometrických pozorování</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

The Planetary Science Journal

ISSN

2632-3338

e-ISSN

2632-3338

Svazek periodika

5

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

235

Kód UT WoS článku

001339476600001

EID výsledku v databázi Scopus

2-s2.0-85208259344