---
title: "Plate Solving — GPS for Your Telescope"
canonical: https://stackingstarlight.com/equipment/plate-solve
description: "Plate solving is GPS for your telescope: it matches star patterns in a test frame against a catalog to find exact pointing in seconds."
---

# Plate Solving — GPS for Your Telescope

> Plate solving is GPS for your telescope: it matches star patterns in a test frame against a catalog to find exact pointing in seconds.

After a GoTo, how does the mount know precisely where it points? **Plate solving** takes a short exposure, extracts star positions, forms geometric triangles between them, and matches those patterns against a catalog of billions of stars. In 1–3 seconds it returns your exact coordinates to sub-arcsecond accuracy, and the mount corrects any residual error. Solvers: **Astrometry.net** (open source, offline), **ASTAP** (fast local, great with NINA), **All-Sky Plate Solver**. It removes star-hopping entirely: GoTo → solve → correct → center, even if the initial alignment is off by degrees.

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Source: [https://stackingstarlight.com/equipment/plate-solve](https://stackingstarlight.com/equipment/plate-solve) · Part of [Stacking Starlight](https://stackingstarlight.com) by Michael Kalika.

LLM resources: [LLM index (llms.txt)](https://stackingstarlight.com/llms.txt) · [Complete LLM text (llms-full.txt)](https://stackingstarlight.com/llms-full.txt) · [Markdown homepage (index.md)](https://stackingstarlight.com/index.md)