Hot on the heels of the last apparent comet discovery: http://www.cbat.eps.harvard.edu/iau/cbet/005600/CBET005648.txt We have multiple reports of an object with a coma and/or tail- therefore indicating activity, therefore indicating a comet. Except this “comet” orbits, to the precision of our measurements… Read More »*NEW* : Main-Belt Comet P/2025 W4 (Pan-STARRS)
Quick blurb in Astronomers’ Telegram: www.astronomerstelegram.org/?read=17538Jehin, E. Hmiddouch, S. Aravind, K. et al. TRAPPIST bright comets production rates: 3I/ATLAS, 24P/Schaumasse, C/2025 T1 (ATLAS), C/2025 K1 (ATLAS) and C/2025 R2 (SWAN)on 10 Dec 2025: 22:50 UT Besides covering multiple comets, coverage of interstellar… Read More »ATLAS Slight-Aperture Brightnesses
Let’s catch up with preprints: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2512.09020Hoogendam, W. B. Kuesters, D. Shappee, B. J. et al. University of Hawaii 88-inch Telescope Observations of the Interstellar Comet 3I/ATLAS: Spectrophotometric Blue-Sensitive Spectral Time Series Spanning Two Months… Read More »3I Timely Time Series
There’s a mid-month (15 January 2026, vol. 444) Icarus: Rosenbush, V. Kleshchonok, V. Ivanova, O. et al. A comprehensive study of comet 67P/Churyumov-Gerasimenko in the 2021/2022 apparition. I. Photometry, spectroscopy, mor… Art 116799 .2025.116799Benson, C. I. Scheeres, D. J. The… Read More »Note, Paper: Moving-Object Boogie
Just now on Space Sci Rev, vol. 221 (all of 2025): Hezel, D.C. Palme, H. Zipfel, J. et al. Evolution of the Solar System: Constraints from Meteorites – Editorial Art 125 s11214-025-01254-7 As with the previous editorial, this is more… Read More »Space Sci Rev: Solar Sys. Growth (meta…)
More lightcurves on our little visitor, but this time in millimeter-wave: Astrophysics > Earth and Planetary Astrophysics arxiv.org/abs/2512.021061 Dec 2025Hinkle, J. T. Yang, B. Meech, K. J. et al. JCMT Constraints on the Early-Time HCN and CO Emission and HCN… Read More »ATLAS Maxwell-Tackled
Just discovered November (while we were feasting): a new Main-Belt comet. A typical comet comes out of the outer Solar System, then warms and activates when it reaches the inner Solar System. Not Main-Belters. These “comets” reside in the asteroid… Read More »*NEW* : Main-Belt Comet 2025 W3 (Kresken)
At this moment in time (and space): www.astronomerstelegram.org/?read=17515Jehin, E. Hmiddouch, S. Aravind,K. et al. TRAPPIST first post-perihelion production rates of the Interstellar comet 3I/ATLAS ATel #17515, 1 Dec 2025; 09:00 UT The comet has passed perihelion, is still in the inner Solar System,… Read More »ATLAS Gas Snapshot
More reports on our extrasolar boulder: Astrophysics > Earth and Planetary Astrophysics www.arxiv.org/abs/2511.16247[Submitted on 20 Nov 2025]Ahuja, G. Ganesh, S. Dynamical simulation of the Interstellar Comet 3I/ATLAS Using Newton’s laws (plus a little of Kepler’s), with the path of the comet… Read More »ATLAS Hindustan-Tracking
Posted to Astronomers’ Telegram last week, two more short reports: ATel #17503, www.astronomerstelegram.org/?read=17503 Bolin, B. Wong, I. Lemaux, B. et al. Gemini pre-perihelion detection of CN/C3/C2 gas emission and dust fans in interstellar comet 3I/ATLAS on 20 Nov 2025; 02:37 UTATel #17502; www.astronomerstelegram.org/?read=17502Ganesh,… Read More »3I/ATLAS Bi-‘Gram