An open-source astronomy project

Turn observations
into light curves.

Seestar Photometry Analyzer helps you explore stellar brightness, inspect tracking stability, and share your results—from logs or session folders to exploratory charts, entirely in your browser.

Open analyzer →Download project

For Seestar S50 / S50 Pro exports · No installation or account required

Synthetic light curve: magnitude near 10 before and after a smooth dip to about 10.65 around midnight, with brighter magnitudes at the top — Explore a complete dip and recovery with the included fictional eclipse dataset. This is a simulation, not an observed star or a confirmed astrophysical event.

Explore the measurements

A closer look at your observing session

Interactive photometry

Actual observation times, an inverted magnitude axis, clock-aligned median bins, optional uncertainty bars, and zoom and pan.

Tracking diagnostics

Inspect sensor positions, drift, and possible movement events alongside changes in measured brightness.

Quality controls and themes

Inspect SNR and uncertainty, switch between targets, and choose five coordinated themes, including red light and high contrast.

Session scans and curve gallery

Explore provisional coordinate tracks in selectable-size miniature curves. Check target-log overlap and inspect local catalogue candidates or click through to SIMBAD. Associations and review ranking remain exploratory.

Results you can share

Export a high-resolution chart, processed CSV, or printable HTML report. Exploratory variability shading stays clearly labeled as a heuristic.

Start exploring

Try it with an example

Download the sample
Get the synthetic eclipse CSV: 1,081 measurements across six hours, including a midnight crossing.
Open the analyzer
Launch the tool, then select or drag in the downloaded CSV. Your own Seestar files work the same way.
Inspect and export
Explore the dip, adjust the bins, inspect tracking, and export your chart or report.

Build on the project

Fork it. Adapt it. Share it.

The source is available under the MIT license. Download the self-contained analyzer, adapt it for your observing workflow, or contribute improvements through a pull request.

Fork on GitHub ↗Documentation Download HTML

AI development disclosure

OpenAI Codex generated and revised the code, analysis heuristics, synthetic data generator, tests, and documentation under the direction of Chris Seabrooke / Seabrooke.Astronomy.

Automated tests include real Seestar data and synthetic fixtures. These checks are not independent scientific validation. Variability flags do not confirm eclipses or predict future events.

Read the full disclosure ↗