Not only are we characterizing interstellar object 3I/ATLAS, we’re going meta: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2510.13222[Submitted on 16 Oct 2025]Grant, S. R. Jones, G. H. Prospects for the Crossing of Comet 3I/ATLAS’s Ion Tail arxiv.org/abs/2510.11779[Submitted on 15 Oct… Read More »Chance ATLAS Plasma Catch?
The “issues” of Monthly Notices of the Royal Astronomical Society (MNRAS) for October are up: volume 542, #4 – volume 543, #1Li, Z. Qiao, D. Li, X. Spatial temporary capture in the Sun–planet three-body system Pgs 625 staf1430 volume 543,… Read More »Note, Paper: Planetary Particles Aplenty
Briefly: the PUNCH mission to monitor the Sun states that they are still tracking interstellar object 3I/ATLAS, even though the small body has passed “behind” the Sun (as seen from Earth). In other words, ‘solar conjunction’: bsky.app/profile/kwalsh4a.bsky.social/post/3m2rnxlgigs2v “While 3I Atlas… Read More »PUNCH Sun Conjunction Mention
The characterization continues. With the trajectory well-determined over a long arc, we check and recheck spectral bands and lines (therefore, compositions): Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2510.02817[Submitted on 7 Oct 2025]Coulson, I. M. Kuan, Y-J. Charnley, S. B. JCMT… Read More »3I Cyanide Multi-Time Described
More spectral sleuthing attempted at ATLAS: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2509.26053[Submitted on 30 Sep 2025]Hutsemékers, D. Manfroid, J. Jehin, E. et al. Extreme NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS As I’ve mentioned before,… Read More »3I/ATLAS Flash-To-Gas Graphed
Briefly: I post on the PUNCH mission, since Sungrazing comets are relevant (including ‘comets’- asteroids passing so close to the Sun that rock vaporizes and emits). Now, PUNCH is relevant for (barely) tracking 3I/ATLAS as it starts going behind the Sun… Read More »PUNCH Catches ATLAS Passage
Briefly: The Astronomer’s Telegram posts quick, short, straightforward notices… like telegrams! ATel#17416 www.astronomerstelegram.org/?read=17416Farnham, T. L. Feaga, L. M. Ye, Q. et al. Observations of an Asymmetric CN Coma in Interstellar Comet 3I/ATLAS 23 Sep 2025; 19:02 UT Cyanide and cyano-compounds… Read More »3I Cyan-Active ATLAS
The “issue” of Monthly Notices of the Royal Astronomical Society for September is posted. In it: Volume 542, Issue 1Kleshchonok, V. Sierks, H. Güttler, C. Inner coma of comet 67P/Churyumov–Gerasimenko during increased activity at perihelion on 2015 August 22–23 Pgs… Read More »Note, Paper: Part Departed, or Hardly?
The Planetary and Space Science issue for 1 Oct (vol. 265) includes: Gallot, T. Sedofeito, C. Ginares, A. et al. Seismic wave experiments in granular media with applications to asteroids Art 106153 .2025.106153Barbieri, C. Beolchi, A. Bertini, I. et al. Preparing for… Read More »Note, Paper: We Cover Pre-Recovery
In a few days: the “Cosmic Dust 15” meeting, in Osaka. https://www.cps-jp.org/~dust/Welcome.html Yes, dust. You know, the dust that is shed by comets, plus asteroids too (active asteroids, and the ejecta from impacts). The meteors you see in the night… Read More »Cosmic Dust Meeting 2025