3 ms·

3 days ago, it was first seen. About a dozen observations. F***, it's not fun that these pass with so little forewarning. ZTm0038* C2023 08 12.49542 06 32 3

by mcint 3y ago

3 days ago, it was first seen. About a dozen observations. F***, it's not fun that these pass with so little forewarning. ZTm0038* C2023 08 12.49542 06 32 33.23 +15 57 35.5 18.86rUNEOCPI41 Is the first entry, and asterisk-marked, on https://cneos.jpl.nasa.gov/scout/#/object/ZTm0038 https://cneos.jpl.nasa.gov/scout/#/object/ZTm0038 at the bottom, in the Observations section. Unusual (new to me) format. Appears to me, first guess to read: [object] [yr] [m] [day.time-decimal] [position] [elevation-angle] [observatory] Likely oriented relative to the plane of the ecliptic, and absolute direction relative to Earth at time of observation.

mcint 3y ago
Here's a visualization of its orbit, Earth in green, object in teal: http://orbitsimulator.com/gravitySimulatorCloud/yr/gsim2023.html?sv,1,ZTm0038,2460169.50,114739276938.995850,-91720755537.183609,-807288875.097566,18794.391969,22612.479413,1.284824,0,0,00FF00,90,65,,16000,0,12,1,0,19.575147,0.150000 http://orbitsimulator.com/gravitySimulatorCloud/yr/gsim2023....
jacquesm 3y ago
Not to spoil your lunch or anything: https://www.youtube.com/watch?v=bU1QPtOZQZU https://www.youtube.com/watch?v=bU1QPtOZQZU Of course 500 Km is a big difference with 400 meters but to those near the point of impact it wouldn't matter and the global effects would still be beyond anything in our history. This is one interpretation of what this could look like: https://youtu.be/ZyyrfB8s5cY?t=152 https://youtu.be/ZyyrfB8s5cY?t=152
- vkou 3y ago
  The difference between the 500km asteroid impact in the video, and a 400m asteroid impact is the difference between a man jumping, and a man jumping to the moon.
  - jacquesm 3y ago
    Yes, it is the difference between a sterilization level event and one that is probably survivable. But it would still be the most significant impact in all of recorded history and to get to a larger one you'd have to go back a long, long time.
    - throwbadubadu 3y ago
      Even a 400m land hit sounds pretty survivable for whole humanity, significant climate impact is expected beyond the 1km range?
      - jacquesm 3y ago
        Yes, it would be survivable for humanity. But depending on where it would happen, how dense the impactor is and at what speed it is traveling the effects would nevertheless be quite serious. Imagine NYC or SF taken out like this (of course the chances of that happening are really small given their area relative to the total of the planetary surface): https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL073191 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/201...

by mcint 3y ago

mcint 3y ago

Here's a visualization of its orbit, Earth in green, object in teal: http://orbitsimulator.com/gravitySimulatorCloud/yr/gsim2023.html?sv,1,ZTm0038,2460169.50,114739276938.995850,-91720755537.183609,-807288875.097566,18794.391969,22612.479413,1.284824,0,0,00FF00,90,65,,16000,0,12,1,0,19.575147,0.150000 http://orbitsimulator.com/gravitySimulatorCloud/yr/gsim2023....

jacquesm 3y ago

Not to spoil your lunch or anything: https://www.youtube.com/watch?v=bU1QPtOZQZU https://www.youtube.com/watch?v=bU1QPtOZQZU Of course 500 Km is a big difference with 400 meters but to those near the point of impact it wouldn't matter and the global effects would still be beyond anything in our history. This is one interpretation of what this could look like: https://youtu.be/ZyyrfB8s5cY?t=152 https://youtu.be/ZyyrfB8s5cY?t=152

vkou 3y ago
The difference between the 500km asteroid impact in the video, and a 400m asteroid impact is the difference between a man jumping, and a man jumping to the moon.
- jacquesm 3y ago
  Yes, it is the difference between a sterilization level event and one that is probably survivable. But it would still be the most significant impact in all of recorded history and to get to a larger one you'd have to go back a long, long time.
  - throwbadubadu 3y ago
    Even a 400m land hit sounds pretty survivable for whole humanity, significant climate impact is expected beyond the 1km range?
    - jacquesm 3y ago
      Yes, it would be survivable for humanity. But depending on where it would happen, how dense the impactor is and at what speed it is traveling the effects would nevertheless be quite serious. Imagine NYC or SF taken out like this (of course the chances of that happening are really small given their area relative to the total of the planetary surface): https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL073191 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/201...