Author

K. Muinonen

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Open access Sep 2026

Thermophysical characterization of the potentially hazardous near-Earth object 2024 YR4

The asteroid 2024 YR_4 is a potentially hazardous Apollo-type near-Earth object. Its highly eccentric orbit produces close Earth-Moon encounters roughly every 4 years. Based on the astrometry collected during the discovery apparition, the asteroid had a 4% probability of a lunar impact on 2032 December 22. A collection...

T. Müller, E. MacLennan, A. Burdanov et al. · Astronomy & Astrophysics · 0 citations

Preprint Sep 2026

Nordic-based observations of binary asteroid (163693) Atira reveal a hydrated CM chondrite composition

We present photometric, spectroscopic, and polarimetric observations of (163693) Atira collected on the night of 05 March 2024. A dual-band lightcurve acquired in the V and R_C filters using the Mets\"ahovi Observatory (L08) in Kirkkonummi, Finland spans nearly 8~hours. From these measurements we estimate a V-R_C = 0.4...

E. MacLennan, G. Fedorets, Z. Gray et al. · 0 citations