KMTNet Exoplanet Archive

A static, browsable catalog of exoplanets (and brown-dwarf / free-floating planet candidates) discovered through KMTNet (Korea Microlensing Telescope Network) microlensing surveys — styled after the NASA Exoplanet Archive.

Open index.html in a browser (or serve the folder with any static file server) — no build step required.

Data pipeline

1. data/kmtnet_planets.json — the merged dataset the site reads (via assets/data/planets.js, a JS-wrapped copy for file://-friendly loading without CORS issues).
2. scripts/parse_numbers.py — rebuilds the base catalog (name, ADS publication link, title, publication year, Planet/BD/FFP classification) from the source .numbers spreadsheet.
3. scripts/merge_nasa.py — merges physical parameters (mass, semi-major axis, host-star mass, distance, RA/Dec, discovery telescope/facility, release date) from a NASA Exoplanet Archive CSV export (PSCompPars table, filtered to discoverymethod = Microlensing) by matching planet name.
4. scripts/merge_exoplaneteu.py — tops up whatever fields are still blank after the NASA merge from an exoplanet.eu catalog export (all detection_type = Microlensing rows), matching by name and alternate names. Never overwrites a value the NASA merge already filled in.
5. scripts/build_site_data.py — regenerates assets/data/planets.js from data/kmtnet_planets.json after any of the above.

pip install numbers-parser
python scripts/parse_numbers.py path/to/source.numbers
python scripts/merge_nasa.py data/raw/nasa_pscomppars.csv
python scripts/merge_exoplaneteu.py data/raw/exoplanet_eu_catalog.csv
python scripts/build_site_data.py

Entries not yet matched to either source show TBD for physical parameters rather than being hidden.

Notes on the source data

• The base spreadsheet's "Notes" column mixes several kinds of annotations (BD/planet classification, mass estimates, running free-floating-planet counters, year-end subtotal notes) — parse_numbers.py separates the meaningful classification text from bookkeeping noise.
• "Type" badges (Planet / Brown dwarf / BD-planet boundary / Free-floating) reflect the source spreadsheet's own classification; several objects near the planet–brown-dwarf boundary have disputed masses and are kept in the catalog with that ambiguity flagged rather than dropped.
• This is a fan-maintained catalog, not an official KMTNet or NASA product.