@hydezero-message.bsky.socialPaid guide: work through Atira's slit-loss correction, absorption depth and porosity error propagation. Article exercises clarify the assumptions linking surface minerals to the interior, and how to design follow-up observations.
https://note.com/hydezero/n/nf4ec488c612e?hl=en
#Asteroids #Physics
@hydezero-message.bsky.socialHow can photometry help recover Atira's spectrum? Explore slit-loss correction, CM-meteorite comparisons and continuum choices behind the inference of hydrated minerals. An absorption depth is not a water fraction.
https://note.com/hydezero/n/nd21455994b60?hl=en
#Spectroscopy #Asteroids
@hydezero-message.bsky.socialCould Atira's rocks retain traces of past water? Corrected visible spectra resemble CM meteorites, suggesting hydrated minerals. The inference depends on slit-loss and continuum choices; it is not a detection of liquid water.
https://note.com/hydezero/n/n94c98aaa37bf?hl=en
#Asteroids #Astronomy
@tchapacan.bsky.socialA massive space rock the size of the Golden Gate Bridge is cruising past us today. At over 50 times the distance to the Moon, 2001 RY47 is just a giant cosmic tourist passing through our neck of the woods. Space is truly humongous. ☄️
@orbitalradar.bsky.socialNext asteroid close approach: 2026 SC will miss us by just 1.7 lunar distances on 2026-Sep-25.
Traveling at 7.8 km/s, it's a spectacular flyby, not a threat. Track its live orbit and distance from Earth at our site.
orbitalradar.com/asteroid/2… #Asteroids #SpaceSafety #OrbitalRadar
@tchapacan.bsky.socialSpace rock 2016 LY8 is swinging by today, measuring up to the height of a 40-story skyscraper. It’s staying a safe 34 times the distance of our Moon, moving at a casual 26,000 mph. Just a quiet Friday cruise for our neighborhood cosmic neighbors. ☄️
@ccaf595.bsky.socialNEO follow-up: Amor asteroid 2026 SO12 confirmed at mag 19.6 by our 0.61-m telescope.
Closest approach: Oct 09, 19:07 UT
Distance: 39 million km
Estimated size: 196-439 m
@stellarvisions.bsky.socialLe vaisseau Dawn, prêt à explorer les mystères de la ceinture d'astéroïdes. 🚀✨
@tchapacan.bsky.socialA giant rock the size of two football fields is zooming past us today at over 100,000 km/h. While it’s technically on the hazardous list, it’s hanging out safely at nearly 200 times the distance to the Moon. Space is wild. ☄️
@chopshopstore.bsky.socialYou can build scenes like this. 40 different stamps with moons like #Ganymede to potato shaped #asteroids.
@ccaf595.bsky.socialNEO follow-up: Amor asteroid 2026 SD12 discovered by Pan-STARRS 2 and first confirmed at mag 19.7 by our 0.61-m telescope.
Closest approach: Sep 23, 09:29 UT
Distance: 13 million km
Estimated size: 70-156 m
@ccaf595.bsky.socialNEO follow-up: Apollo asteroid 2026 SA12 discovered by Palomar Mountain--ZTF and first confirmed at mag 18.6 by our 0.61-m telescope.
Closest approach: Sep 21, 19:48 UT
Distance: 780 thousand km !!
Estimated size: 8-17 m
@tchapacan.bsky.socialA 350-meter space giant is zooming past us today—that’s taller than the Eiffel Tower! While it’s cruising at a safe distance of 190 times the trip to the Moon, its speed is a staggering 78,794 km/h. Space is definitely keeping things busy out there tonight. ☄️
@ccaf595.bsky.socialNEO follow-up: Amor asteroid 2026 SZ7 confirmed at mag 19.8 by our 0.61-m telescope.
Closest approach: Sep 30, 10:17 UT
Distance: 19 million km
Estimated size: 67-149 m
@orbitalradar.bsky.socialNext asteroid close approach: 2026 SY will pass Earth on 2026-Sep-21, skimming by at ~5.5 lunar distances — that's 2,131,238 km! Traveling at 9.8 km/s, it's a cosmic show you'll want to track. See its live distance and orbit: orbitalradar.com/asteroid/2… 🌌 #Asteroids #SpaceTracking
@tchapacan.bsky.socialA giant space rock the size of two Eiffel Towers is hurtling past us today at 80,455 km/h. While 2018 PL23 is safely 68 times the distance to the Moon away, it’s still a massive reminder of just how busy our neighborhood truly is out there in the dark. ☄️
@ccaf595.bsky.socialNEO follow-up: Apollo asteroid 2026 SY2 confirmed at mag 19.6 by our 0.61-m telescope.
Closest approach: Sep 21, 11:25 UT
Distance: 928 thousand km !!
Estimated size: 10-21 m
@ccaf595.bsky.socialNEO follow-up: Apollo asteroid 2026 SW2 confirmed at mag 19.3 by our 0.61-m telescope.
Closest approach: Sep 03, 14:51 UT
Distance: 13 million km
Estimated size: 143-320 m
@ccaf595.bsky.socialNEO follow-up: Apollo asteroid 2026 SS2 confirmed at mag 18.4 by our 0.61-m telescope.
Closest approach: Sep 20, 02:39 UT
Distance: 2.1 million km !
Estimated size: 31-68 m
@ccaf595.bsky.socialNEO follow-up: Apollo asteroid 2026 SO2 confirmed at mag 17.5 by our 0.61-m telescope.
Closest approach: Sep 18, 03:35 UT
Distance: 2.0 million km !
Estimated size: 17-38 m