Tony Dunn
@tony873004
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Orbit simulations of planets, comets, asteroids, spacecraft, and other interesting stuff. Amateur astronomer. BA: Physics & Astronomy, SFSU.
San Francisco
Joined April 2010
RT @Science_Release: ATLAS彗星に関する内容、もうプレプリントとか早すぎるよ！.直径約20kmというのは、小惑星のアルベド約0.05を仮定しての算出結果なのを再確認。あの時には彗星かどうか断定されてなかったからね。.なので彗星だと確認されている現在では、….
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Unlike `Oumuamua, #A11pl3Z was discovered, not before, but much before closest approach.
Project Lyra explores the possibility of sending a spacecraft to chase 'Oumuamua using an Earth gravity assist to reach Jupiter, which robs the craft of almost all its speed, causing it to drop to the Sun for an Oberth maneuver. Thanks @hibberdadam994 for the trajectory data!
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Baseball has the #allStarGame. Astronomy has Amazing group of authors reporting on our new #A11pl3Z interstellar friend!.
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Did hell freeze over? Or did I just get a rare July sunset in San Francisco?
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Interstellar visitor confirmed. #A11pl3Z is now known as 3I/ATLAS. It is only the third confirmed object from beyond our solar system.
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New observations came in over night. Here's A11pl3Z's updated path. It now passes inside Mars' orbit. In yesterday's animation, the camera was below the ecliptic. This is from above, so if it looks mirrored, that's why. #astronomy #A11pl3Z
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3rd interstellar object discovered? Maybe. There's a lot of buzz right now in the Astro community. More observations should come in tonight to confirm if A11pI3Z is from beyond the solar system.
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This is unusual. The coast of California often experiences beautiful sunshine, except for my house. Now me +-3 miles is about the only plane getting sun. It's beautiful out now.
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Georgia bolide: A fiery visitor streaked through the sky today, dropping meteorites across the Peach State. The devil might’ve gone down to Georgia, but this one came in fast from above. This animation is an educated guess at its path. #Atlanta #Georgia #Astronomy #Meteor
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If you want to see the 8 new #NEA asteroids discovered by the Vera C. Rubin Observatory tonight, northern hemisphere observers need to look to the southwestern sky. Not surprising, because #RubinObservatory is in Chile. They're also mag 24-25 so you'll need a huge telescope too.
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8 new Near-Earth Asteroids have been discovered by the Vera Rubin Observatory from just 10 hours of sky scanning over the course of a few nights. Imagine what Rubin will do when it's fully operational. #LSST #RubinObservatory #NEO
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Happy Summer Solstice! 🌞.Compared to the year 2000, summer now arrives about 8 hours earlier—thanks to Earth’s slow axial precession. Even in just 25 years, the shift is measurable. #SummerSolstice #Astronomy
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