4 papers
Pre-perihelion Development of Interstellar Comet 3I/ATLAS
David Jewitt, Jane Luu
We describe pre-perihelion optical observations of interstellar comet 3I/ATLAS taken during July - September 2025 using the Nordic Optical Telescope. Fixed aperture photometry of t…
Multiple Outbursts of Halley-Type Comet 12P/Pons-Brooks
David Jewitt, Jane Luu
We present optical observations of Halley type comet 12P/Pons-Brooks on its approach to perihelion. The comet was active even in the first observations at about 8 au. Starting at 4…
Continuous Fragmentation of Comet 157P/Tritton
Jane Luu, David Jewitt
We observed the split comet 157P/Tritton in October - November 2022 and January 2024 with the Nordic Optical Telescope (NOT). Our observations show that the splitting continued dur…
Demise of Kreutz Sungrazing Comet C/2024 S1 (ATLAS)
David Jewitt, Jane Luu, Jing Li
Most Kreutz family sungrazing comets are discovered only days before perihelion, severely limiting observational opportunities to study their physical nature and decay. Kreutz sung…