What's an asteroid "precovery"?☄️👻

Calculating an asteroid's orbit, and so the risk it poses to Earth, requires measuring its position on multiple occasions. For newly discovered asteroids, only a few days or weeks of data are available, so just a preliminary path can be traced pic.twitter.com/BFc6BdwWtc
@esaoperations | 332,115 followers
Replying to @esaoperations
Initial observations sometimes show the newly discovered #asteroid has a chance of impacting Earth, and in these cases researchers use their early orbit calculation to predict where their asteroid might have appeared in the past, in archival images sometimes decades old ...

Engagement Map

Quotes
Replies
Retweets
Trendsmap

Retweeters

No retweeters found
2 retweeters not shown
Free access is provided to the 8 hour timeframe for this page.

A Trendsmap Explore subscription provides full access to all available timeframes

Find out more

This account is already logged in to Trendsmap.
Your subscription allows access for one user. If you require access for more users, you can create additional subscriptions.
Please Contact us if you are interested in discussing discounts for 3+ users for your organisation, or have any other queries.