Our Mission

IAWN was established (2013) as a result of the UN-endorsed recommendations for an international response to a potential NEO impact threat, to create an international group of organizations involved in detecting, tracking, and characterizing NEOs. The IAWN is tasked with developing a strategy using well-defined communication plans and protocols to assist Governments in the analysis of asteroid impact consequences and in the planning of mitigation responses.

Currently, IAWN includes members from Europe, Asia, South and North America.

About IAWN

Observers Twitter feed

Tweets from some of our observing signatories and other active asteroid observers.

Signatories Twitter feed

Tweets from some of our institutional signatories (may have non-asteroid news as well).

Latest from IAWN

Illustration of linear least squares.
Courtesy: Oleg Alexandrov, Wikimedia Commons

Understanding Orbital Uncertainties in the Context of Impact Predictions

(Aug 2021) II: Orbit Fitting-Least Squares Technique for Orbit Estimation
Second in a series of articles detailing the concept of orbital uncertainties as it relates to impact predictions. Celestial mechanics can be a complicated subject, but here we'll try to distill some of these difficulties and render the subject a bit more transparent.
Read More: Least Squares Technique for Orbit Estimation


Community Announcement

Planetary Defense Conference 2021

The 7th IAA Planetary Defense Conference in 2021 is being hosted by the UN Office for Outer Space Affairs (UNOOSA), and will take place April 26-30, 2021.
Read More: Conference Webpage

Close Approaches

Asteriod designation: 2021 SQ
Discovery station: Pan-STARRS 1, Haleakala
Close approach date (UTC): 2021 09 20.62
Close approach distance (× lunar distance): 0.72
Discovery announcement
Latest orbit & observations

Close Approach List

Multi-Opp. CAs