For Asteroid Day, read about how even with the amazing Rubin Telescope asteroid discoveries, we still need dedicated near Earth asteroid searches, including by the Catalina Sky Survey @catalinaskysurvey.bsky.social
catalina.lpl.arizona.edu/news/spectac...

The 2025 Catalina Sky Survey Monsoon Workshop will be held in Tucson, August 1-5, as a splinter session of the ADASSx Summer Software Workshop, immediately following the Rubin Community Workshop.

Registration (free) and abstract submission are now open.

#PlanetSci #AstroMethods #PlanetaryDefense

Sorry folks, here is a no-login link. arizona.csod.com/ux/ats/caree...

We are recruiting a new C programmer. If you love astronomy and want to work on the front lines of planetary defense creating custom software solutions for extracting new NEOs from image data and much more, please take a look! 🔭

arizona.csod.com/ui/internal-...

A well-written piece on Planetary Defense featuring a rock found at CSS in The American Scholar. Enjoy! 🔭

This is a pretty confined definition for a specific class of rock. Often smaller rocks that pose a higher impact risk are also called PHAs. The recurrence interval for a 140m+ impact is thousands of years. The idea is to catalog them all so we can be sure when the next impact might happen.

Rocks that fall under the PHA umbrella from the link above mostly pose no direct threat in the next 100+ years. Their orbits tend to be more gravitationally dynamic though, they can evolve into new orbits which might pose a threat in the future so they get closer attention.

More information on PHAs can be found here: cneos.jpl.nasa.gov/about/neo_gr...

Interactive orbit:

2025 CE13 is a newly discovered potentially hazardous asteroid. It is between 141-316m in diameter and passes within 4.4LD of Earth's orbit. It was discovered on Feb 2nd, 2025 by CSS observer H. Groeller. 2025 CE13 poses no impact threat to Earth. 🔭

Interactive orbit:

Congratulations to CSS observer Hannes Groeller. Hannes recently discovered comet C/2025 D1 (Groeller) from the Bok telescope, which we operate under a partnership with Spacewatch. C/2025 D1 has the largest perihelion distance of any comet found to date. Interactive orbit in comments. 🔭

Interactive orbit:

2025 CW is a newly discovered potentially hazardous asteroid. It is between 200-450m in diameter and passes within 4.32LD of Earth's orbit. It was discovered on Feb 3rd, 2025 by CSS observer T. Beuden. 2025 CW poses no impact threat to Earth. 🔭

Happy to announce we have joined BlueSky and look forward to sharing information about the amazing discoveries we make at CSS. Stick around for some neat stuff! #astronomy #asteroids #planetarydefense

We are a leading near-Earth Object survey operating at the UofA. We'd like to share interesting discoveries with the feed.

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