Domino Observatory

Every claim here carries its stars.

Studying 3I/ATLAS and the interstellar objects to come.

3I/ATLAS, a bright core in a blue cocoon of dust, among stars drawn into short streaks as Hubble followed the comet. — Hubble Space Telescope WFC3 · Optical Long Pass, 350 nm · 21 July 2025Credit: NASA, ESA, D. Jewitt (UCLA); Image Processing: J. DePasquale (STScI)

Free, and yours to use.

domino-calibrator

Open zero-aperture comet astrometry.

Comet 2I/Borisov, a blue glow around a bright core, beside a distant edge-on spiral galaxy.

2I/Borisov, November 2019. Credit: NASA, ESA, and D. Jewitt (UCLA)castle639.github.io/domino-calibrator

interstellar readiness kit

Tests your program before 4I arrives.

Trails of faint stars around 1I/ʻOumuamua, a single point of light marked with a blue circle.

1I/ʻOumuamua, circled, 2017. Credit: ESO/K. Meech et al.github.com/Castle639/interstellar-readiness-kit

3i-station-sigmas

Station sigmas for anyone fitting 3I's orbit.

3I/ATLAS, a bright core inside a wide blue coma, with a few faint star streaks.

3I/ATLAS, 30 November 2025. Credit: NASA, ESA, STScI, D. Jewitt (UCLA). Image Processing: J. DePasquale (STScI)github.com/Castle639/3i-station-sigmas