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 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
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
New posts from Astronomers’ Telegram: www.astronomerstelegram.org/?read=17490Jewitt, D. Luu, J. 3I/ATLAS Still Single ATel #17490; 11 Nov 2025; 19:55 UT www.astronomerstelegram.org/?read=17499Pisano, D. J. Smirnov, O. M. Ivchenko, M. et al. Further MeerKAT observations of 1665/1667 MHz OH in absorption and emission, and a technosignature… Read More »Interstellar Telegram-Slam (3I)
Almost forgot Planetary And Space Science for 15 Nov (vol. 268). The title doesn’t post ahead, chronologically, like lots of other journals. Murphy, B. P. Opitom, C. Snodgrass, C. et al. Recent Chemo-morphological coma evolution of comet 67P/Churyumov-Gerasimenko Art 106178 … Read More »Note, Paper: 67P Leak and Bleed Seasons
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