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I happened to be up watching the Super Bowl in the UK, saw the ESA tweet across my timeline and was able to pop outside to see it at the time they predicted - w

I happened to be up watching the Super Bowl in the UK, saw the ESA tweet across my timeline and was able to pop outside to see it at the time they predicted - was also able to grab a video [0]. So cool to see how far our detection of these objects is coming along, especially for something as small as this was. [0] https://twitter.com/teh_c/status/1624967399131824130 https://twitter.com/teh_c/status/1624967399131824130

Aachen 4y ago
Would you be willing to share your exact location, perhaps in an email to sar2667observation@lgms.nl? From a sibling comment: > Got so lucky finding that Brighton video as the 2nd result earlier. Spent another 15 minutes looking for a third angle but the "looking east", "looking south" indicated angles are either implausible or too inaccurate to be useful. A Paris video is of such quality that I couldn't for the life of me find out which buildings are in view to map it to an angle. There is a building visible in your video, so with that info I could figure out the angle to get a third line. I currently have these two: https://snipboard.io/rBNozt.jpg https://snipboard.io/rBNozt.jpg Or if someone simply knows where to find someone who has a calibrated observation with range finder, I'd also be happy to find the location that way :D somehow I'm having a lot of trouble finding any information about this stone.
- mnw21cam 4y ago
  There's a moon in that video. That'll give you the angle more accurately than a building.
  - dmurray 4y ago
    How? Everywhere nearby me, the moon is in the same direction, but my building isn't.
  - Aachen 4y ago
    I considered that, but I don't think that works because where the moon appears in the sky also depends on where you are. There are two unknowns (moon and meteor) and one video (one equation), if I understand the math correctly (we didn't have solving multiple unknowns in school but this is the theory I heard in relation to GPS needing 4 sats to solve for x,y,z,time). It surprised me how many different combinations of meteor-moon constellations I saw in the various videos being posted. For some, the moon was very close; for me, the moon was like 110° removed I think (somewhere over my left shoulder). Maybe, knowing it was in England, it could help me to narrow down the scenarios (perhaps from an area down to a line?), but I don't have the experience to do that in a time-effective manner and I don't know if it would significantly help with the outcome.
    - mnw21cam 4y ago
      The exact location of the moon in the sky depends to a very small extent on your location on the earth's surface. The tweet says near Brighton, and that's already accurate enough to tell the direction of the moon much more accurately than the size of the moon in the sky. At the time of the video (3am UK time), the moon from brighton was at a compass heading of 144 degrees (calculated by Stellarium). The observer location of "near Brighton" is accurate to within a few km. The moon at that time had a diameter in the sky of 0.5225 degrees (it doesn't change much), so you can also get a reasonably accurate idea of the zoom level of the video, taking the size of the moon in pixels when it is most in-focus (and accounting a bit for glare).
- tehc-uk 4y ago
  https://snipboard.io/4T8Qvf.jpg https://snipboard.io/4T8Qvf.jpg Does this help at all? The line on the left is when the object first becomes visible in the video, and the line on the right is when it explodes and disappears from view - it's actually pretty similar to what you had already.
  - Aachen 4y ago
    Yes, thank you! Overlaying the two, that is indeed awfully close to at least one end: https://snipboard.io/ADVdcO.jpg https://snipboard.io/ADVdcO.jpg What puzzles me is that the other end is so far off that it's outside what I had previously screenshotted of the map (so not visible when intersecting the two). From my POV, the angle difference between start and end was close to zero, like it came fairly straight down. That would be in line with yours if it roughly came towards me, as it roughly indeed did afaict, but I don't think the Brighton pier video had that wide a range. (I should re-watch it to be sure, though.) There are also various reported angles on this event page https://ams.imo.net/members/imo_view/event/2023/937 https://ams.imo.net/members/imo_view/event/2023/937 but half of those honestly look in line with what I previously noticed where a video might have a description "facing east from Jersey" which would mean Paris is in the ~center of their view, not the English channel in front of Dieppe, resulting (because no visible landmarks) in lines like these horizontal/vertical ones <https://snipboard.io/d3rkNI.jpg https://snipboard.io/d3rkNI.jpg>. Compared to all that, your report is definitely more useful! It would seem the meteor traveled at least 30 if not 50 km in those ~five seconds!

Aachen 4y ago

Would you be willing to share your exact location, perhaps in an email to sar2667observation@lgms.nl? From a sibling comment: > Got so lucky finding that Brighton video as the 2nd result earlier. Spent another 15 minutes looking for a third angle but the "looking east", "looking south" indicated angles are either implausible or too inaccurate to be useful. A Paris video is of such quality that I couldn't for the life of me find out which buildings are in view to map it to an angle. There is a building visible in your video, so with that info I could figure out the angle to get a third line. I currently have these two: https://snipboard.io/rBNozt.jpg https://snipboard.io/rBNozt.jpg Or if someone simply knows where to find someone who has a calibrated observation with range finder, I'd also be happy to find the location that way :D somehow I'm having a lot of trouble finding any information about this stone.

mnw21cam 4y ago
There's a moon in that video. That'll give you the angle more accurately than a building.
- dmurray 4y ago
  How? Everywhere nearby me, the moon is in the same direction, but my building isn't.
- Aachen 4y ago
  I considered that, but I don't think that works because where the moon appears in the sky also depends on where you are. There are two unknowns (moon and meteor) and one video (one equation), if I understand the math correctly (we didn't have solving multiple unknowns in school but this is the theory I heard in relation to GPS needing 4 sats to solve for x,y,z,time). It surprised me how many different combinations of meteor-moon constellations I saw in the various videos being posted. For some, the moon was very close; for me, the moon was like 110° removed I think (somewhere over my left shoulder). Maybe, knowing it was in England, it could help me to narrow down the scenarios (perhaps from an area down to a line?), but I don't have the experience to do that in a time-effective manner and I don't know if it would significantly help with the outcome.
  - mnw21cam 4y ago
    The exact location of the moon in the sky depends to a very small extent on your location on the earth's surface. The tweet says near Brighton, and that's already accurate enough to tell the direction of the moon much more accurately than the size of the moon in the sky. At the time of the video (3am UK time), the moon from brighton was at a compass heading of 144 degrees (calculated by Stellarium). The observer location of "near Brighton" is accurate to within a few km. The moon at that time had a diameter in the sky of 0.5225 degrees (it doesn't change much), so you can also get a reasonably accurate idea of the zoom level of the video, taking the size of the moon in pixels when it is most in-focus (and accounting a bit for glare).
tehc-uk 4y ago
https://snipboard.io/4T8Qvf.jpg https://snipboard.io/4T8Qvf.jpg Does this help at all? The line on the left is when the object first becomes visible in the video, and the line on the right is when it explodes and disappears from view - it's actually pretty similar to what you had already.
- Aachen 4y ago
  Yes, thank you! Overlaying the two, that is indeed awfully close to at least one end: https://snipboard.io/ADVdcO.jpg https://snipboard.io/ADVdcO.jpg What puzzles me is that the other end is so far off that it's outside what I had previously screenshotted of the map (so not visible when intersecting the two). From my POV, the angle difference between start and end was close to zero, like it came fairly straight down. That would be in line with yours if it roughly came towards me, as it roughly indeed did afaict, but I don't think the Brighton pier video had that wide a range. (I should re-watch it to be sure, though.) There are also various reported angles on this event page https://ams.imo.net/members/imo_view/event/2023/937 https://ams.imo.net/members/imo_view/event/2023/937 but half of those honestly look in line with what I previously noticed where a video might have a description "facing east from Jersey" which would mean Paris is in the ~center of their view, not the English channel in front of Dieppe, resulting (because no visible landmarks) in lines like these horizontal/vertical ones <https://snipboard.io/d3rkNI.jpg https://snipboard.io/d3rkNI.jpg>. Compared to all that, your report is definitely more useful! It would seem the meteor traveled at least 30 if not 50 km in those ~five seconds!