Quickly: ApJL (Astrophysical Journal, Letters), the fast(er…)-response medium of Astrophysical Journal, now includes (vol. 994 #1, Nov 20): Jewitt, D. Luu, J. Preperihelion Development of Interstellar Comet 3I/ATLAS L3 This is the “print” (official, as opposed to preprint) of their… Read More »3I Light Curve Blurb
Quickly, an Astronomers Telegram post on our little visitor: www.astronomerstelegram.org/?read=17473Pisano, D. J. Smirnov, O. M. Ivchenko, M. et al. Detection of 1665/1667 MHz OH absorption in 3I/ATLAS. ATel #17473, 4 Nov 2025; 10:28 UT Many molecules have spectral features in the far-infrared, submillimeter,… Read More »ATLAS Ast-Tel Gases
Hey undergraduates, time to shape up those resumes: Extraterrestrial Materials Academy (ETMA), Lunar and Planetary Institute The LPI will hold a paid session for college students this coming Summer, Jun. 8-Aug. 15. As the title indicates, the emphasis is on… Read More »Call: Small-Body Opportunities
We go meta. As our interstellar guest scoots through the inner Solar System, a journalist interviews guest scientists: www.scientificamerican.com/article/the-interplanetary-race-to-study-interstellar-comet-3i-atlas/Meghan Bartels, Oct 31 2025 The Interplanetary Race to Study Interstellar Comet 3I/ATLAS Pretty accurate. Not much hard sci, but more of… Read More »3I Scientists Plied
The 1 November Planetary and Space Science (vol. 267) is up: Garcia, R. S. Fernández-Lajús, E. Di Sisto, R. P. et al. Comet 12P/Pons-Brooks: Dust properties Article 106181 .2025.106181 Comet activity is a puzzle we still haven’t solved. Yes, a… Read More »Note, Paper: 2D Receding Treatment
With 3I/ATLAS difficult to see in most telescopes, it’s a good time for theoretical astronomy: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2510.26308[Submitted on 30 Oct 2025]Maggiolo, R. Dhooghe, F. Gronoff, G. Interstellar Comet 3I/ATLAS: Evidence for Galactic Cosmic Ray Processing arxiv.org/abs/2510.25945[Submitted on… Read More »3I Bi-Hypothesized
Yesterday was Oct. 29, perihelion for 3I/ATLAS. That was the point in its trajectory (not orbit) when it was closest to the Sun. As the comet neared the Sun, it rose in temperature, and thus activity. That activity: Astrophysics >… Read More »3I Behind Prime Sky Light
In November 1’s issue (vol. 993 #1) of Astrophysical Journal Letters: Farnocchia, D. Vokrouhlicky, D. Santana-Ros, T. et al. Radiation Forces and Trajectory of Hayabusa2# Target 1998 KY26 L9 ae10b8Salazar Manzano, L. E. Lin, H-W. Taylor, A. G. et al.… Read More »Note, Paper: Non-Pusher
Of late, in Planetary Science Journal (all vol.6): Salazar Manzano, L. E. Gerdes, D. W. Napier, K. J. et al. Prospects of a New L5 Trojan Flyby Target for the Lucy Mission 213 adf5c2Dorsey, R. C. Hopkins, M. J. Bannister,… Read More »Note, Paper: PSJ Particle Population Post
Our interstellar friend is behind the Sun (to observers on or near Earth). Good time to recap activity (emission of coma and tail(s)) so far: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2510.18769[Submitted on 21 Oct 2025]Jewitt, D. Luu, J. Pre-perihelion… Read More »First-Half ATLAS Activity Track