Debiasing astro-photometric observations with corrections using statistics (DePhOCUS)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00603127" target="_blank" >RIV/67985815:_____/25:00603127 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0361048" target="_blank" >https://hdl.handle.net/11104/0361048</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.icarus.2024.116366" target="_blank" >10.1016/j.icarus.2024.116366</a>

Result language

angličtina

Original language name

Debiasing astro-photometric observations with corrections using statistics (DePhOCUS)

Original language description

Photometric measurements allow the determination of an asteroid's absolute magnitude, which often represents the sole means to infer its size. Photometric observations can be obtained in a variety of filters that can be unique to a specific observatory. Those observations are then calibrated into specific bands with respect to reference star catalogs. In order to combine all the different measurements for evaluation, photometric observations need to be converted to a common band, typically V-band. Current band-correction schemes in use by IAU's Minor Planet Center (MPC), JPL's Center for Near Earth Object Studies (CNEOS) and ESA's NEO Coordination Centre (NEOCC) use average correction values for the apparent magnitude derived from photometry of asteroids as the corrections are dependent on the typically unknown spectrum of the object to be corrected. By statistically analyzing the photometric residuals of asteroids, we develop anew photometric correction scheme that does not only consider the band, but also accounts for reference catalog and observatory. We analyzed nearly 500000 observations submitted to the MPC from 468 asteroids with published and independently determined high confidence H and G values. We describe a new statistical photometry correction scheme for asteroid observations with debiased corrections. Testing this scheme on a reference group of asteroids, we see a 36% reduction in the photometric residuals. Moreover, the new scheme leads to amore accurate and debiased determination of the H-G magnitude system and, in turn, to more reliable inferred sizes. We discuss the significant shift in the corrections with this DePhOCUS debiasing system, its limitations, and the impact for photometric and physical properties of all asteroids, especially Near-Earth Objects.

Czech name

—

Czech description

—

Type

J_imp - 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)

Project

<a href="/en/project/GA23-04946S" target="_blank" >GA23-04946S: Study of evolutionary paths of asteroids driven by non-gravitational forces with photometric observations</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Icarus

ISSN

0019-1035

e-ISSN

1090-2643

Volume of the periodical

426

Issue of the periodical within the volume

Jan.

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

17

Pages from-to

116366

UT code for WoS article

001360696900001

EID of the result in the Scopus database

2-s2.0-85209252453