Observed arrival · 2026-10-14
PNHunter searches sky surveys for planetary-nebula candidates
A macOS beta helps amateur astronomers find candidate planetary nebulae in large sky surveys and follow them toward an observation and discovery dossier.
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●Pro
◎Niche
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- For
- Amateur astronomers searching sky-survey data for planetary nebulae
- Worth noticing
- The homepage reports recovering 8 of 10 known nebulae in a blind test and ranks them among 4,553 detections.
Field notes
The described pipeline separates narrow-band emission from broad-band light, filters stars, and searches at multiple image scales before ranking candidates. The homepage reports an AUC of 0.92 for its Pan-STARRS classifier on held-out blocks and says DSS2 plates can help check whether a candidate was present in earlier imagery. These performance figures are claims on the site, not independently verified in the supplied evidence.
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○OpenPublic substance visible
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●ProPolished or operationally mature
◎NicheUnusually specific use
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