Automated asteroid alerts with NASA API, Slack & Google Calendar

by Yusuke Yamamoto ✓ · 145 views · created 2025-10-19 · Social Media

What this workflow does

This workflow has 10 nodes and runs on a schedule (every 12 hours). Along the way it connects Slack, NASA and Google Calendar.

How it runs

Trigger: On a schedule (every 12 hours).

1. Calculate Date Range (Code): runs custom JavaScript code
2. Get an asteroid neo feed (NASA): work with asteroid neo feed
3. Filter and Process Asteroids (Code): runs custom JavaScript code
4. Check If Asteroids Found (If): checks a condition and branches into true / false
5. Format Alert Messages (Code): runs custom JavaScript code
6. Send Slack Alert (Slack): uses Slack
7. Split Out: splits a list into separate items
8. Create an event (Google Calendar): uses Google Calendar

Services it uses

SlackNASAGoogle Calendar

Before you upgrade to n8n 3.0

Nodes used (8)

• Schedule Triggern8n-nodes-base.scheduleTrigger
• Coden8n-nodes-base.code
• Ifn8n-nodes-base.if
• Slackn8n-nodes-base.slack
• Split Outn8n-nodes-base.splitOut
• NASAn8n-nodes-base.nasa
• Google Calendarn8n-nodes-base.googleCalendar
• No Operation, do nothingn8n-nodes-base.noOp

From the author

This n8n template creates an automated alert system that checks NASA's data for near-Earth asteroids twice a day. When it finds asteroids meeting specific criteria, it sends a summary alert to Slack and creates individual events in Google Calendar for each…

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