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Record W4416852278 · doi:10.1038/s41467-025-65749-1

Accurate geometric albedo, shape, and size of Hi’iaka from a stellar occultation

2025· article· en· W4416852278 on OpenAlexaff
E. Fernández-Valenzuela, J. L. Ortiz, Bryan J. Holler, B. Sicardy, F. L. Rommel, Mónica Vara-Lubiano, N. Morales, F. Vachier, J. Desmars, M. Kretlow, R. Vieira-Martins, Emmanuël Jehin, Marin Ferrais, P. Santos-Sanz, Zafar Rustamkulov, Alexander de la Vega, Elizabeth Warner, Z. Benkhaldoun, Roxanne L. Kamin, Al Ryan, Bernie Earls, Dennis M. Conti, Julien de Wit, Artem Burdanov, Richard Francini, Philip P. Langill, R. Morales, Wesley C. Fraser, Csaba Kiss, András Pál, D. Souami, J. Lecacheux, F. Braga-Ribas, R. Duffárd, A. Álvarez-Candal, G. Benedetti-Rossi, B. E. Morgado, J. I. B. Camargo, A. R. Gomes-Júnior, M. Assafin, D. Baba Aissa, Zaki Grigahcene, M. W. Buie, J. Licandro, M. R. Alarcón, M. Serra‐Ricart, A. J. Castro‐Tirado, Emilio Fernández-García, R. Iglesias-Marzoa, F. J. Galindo-Guil, Hugo González, R. Gonçalves, A. W. Rengstorf, R. L. Flynn, Aart M. Olsen, Bill Hanna, Jason W. Barnes, Joseph A'Hearn, Steven M. Kreyche, William J. Miller, Lillian E. Mortensen, Thomas C. Gibson, Gary Walker, G. Stolle-McAllister, Gregory A. Feiden, Joseph Froetschel, S. J. Steel, Destin Encardes, R. S. Fisher, Alton Luken, Eric Holcomb, D. B. Caton, Bob Dunford, D. Monin

Bibliographic record

VenueNature Communications · 2025
Typearticle
Languageen
FieldPhysics and Astronomy
TopicAstro and Planetary Science
Canadian institutionsHerzberg Institute of AstrophysicsUniversity of VictoriaUniversity of Calgary
FundersNational Research, Development and Innovation OfficeAgencia Estatal de InvestigaciónNemzeti Kutatási Fejlesztési és Innovációs HivatalConsejo Superior de Investigaciones CientíficasInstituto de Astrofísica de AndalucíaJunta de AndalucíaFonds De La Recherche Scientifique - FNRSNuclear Safety and Security CommissionFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de JaneiroConselho Nacional de Desenvolvimento Científico e TecnológicoNational Aeronautics and Space AdministrationCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorSmithsonian Astrophysical Observatory
KeywordsOccultationGeometric albedoDwarf planetAlbedo (alchemy)Hydrostatic equilibriumRotation (mathematics)Angular diameterEllipsoidStellar rotation

Abstract

fetched live from OpenAlex

higher than Haumea's). The combination of low density and rapid rotation (9.68 ± 0.02 hours), under the assumption of a homogeneous body, indicates that Hi'iaka deviates from hydrostatic equilibrium.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.011
Threshold uncertainty score0.022

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0020.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.011
GPT teacher head0.274
Teacher spread0.263 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations3
Published2025
Admission routes1
Has abstractyes

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