The Open Supernova Catalog
A community-curated astronomical repository indexing 110,222+ explosive transients, multi-band optical light curves, and calibrated spectra from 1000 AD to 2026+.
Total Transients
110,222
Historical & modern survey events
Calibrated Spectra
20,965
Multi-epoch spectroscopic time series
Photometric Epochs
673,154
Multi-band UV, optical & NIR observations
API & Integrations
REST + MCP
Zero-token API, IVOA cone search & AI tools
Newest classified supernovae on file
Ages are counted from today, September 28, 2026, using each event's discovery date from the Transient Name Server.
| Name | Aliases | Disc. Date | Max Date | mmax | Mmax | Host Name | R.A. | Dec. | Host R.A. | Host Dec. | Host Offset (") | Host Offset (kpc) | Instruments/Bands | z | v☉ (km/s) | dL (Mpc) | Type | E(B-V) | Phot. | Spec. | Radio | X-ray | References | Data | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Aliases | Disc. Date | Max Date | mmax | Mmax | Host Name | R.A. | Dec. | Host R.A. | Host Dec. | Host Offset (") | Host Offset (kpc) | Instruments/Bands | z | v☉ (km/s) | dL (Mpc) | Type | E(B-V) | Phot. | Spec. | Radio | X-ray | References | Data |