Interesting object

I know it’s a glitch or something of the like. But it looks so cool!

https://www.legacysurvey.org//viewer/?ra=192.6257&dec=10.6331&layer=ls-dr9&zoom=16

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Oh that’s cool :slight_smile: If you click on the map at that location, you’ll see a popup menu, and one of the options is “single exposures”, which will take you to
https://www.legacysurvey.org/viewer/exposures/?ra=192.6258&dec=10.6329&layer=ls-dr9
showing postage stamps of all the individual exposures for that bit of sky. You’ll see bright objects in three of the images that happen to have consecutive exposure numbers – taken back-to-back. If you click the “Look up in JPL small bodies database” link, you should get a result (it takes a long time) – it’s asteroid 423 Diotima (A896 XA) … which is 175 km in diameter! Cool!

https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=423

cheers,
dustin

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oh, and, the funny-looking flare around it is because we’ve basically tried and partially failed to detect it as a moving / variable object! For the DESI survey that we took these observations for, we only care about basically-stationary stars and galaxies, so we try to detect and mask out things that move or vary between exposures. In this case, we observed this asteroid in two out of the three g-band (blue) exposures, so it was harder to detect as an outlier, so didn’t get fully masked out.

cheers,
dustin

Thanks for the information. I just thought it looked really cool.

Welcome! Cory