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Fireball Spotted over Northeastern USA

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Re: Fireball Spotted over Northeastern USA

#121

Post by rvba »

roywiggins wrote: post #66
IIAOPSW wrote: post #60

Earlier quoted context omitted.

You haven't accounted for the massive gravity well that is the sun. The difference in potential energy from infinity to the radius of Earths orbit is GMm/r. Set that equal to momentum (.5mv^2) and you get sqrt(2GM/r). Plug in the numbers and you'll see you can't really have a meteor that stumbled in from outside the solar system with a similar velocity to Earths orbit by the time it came down to Earths orbit. Put ano…

Near-earth asteroids periodically wander into temporary orbits around the Earth and then wander off. https://earthsky.org/space/2020-so-mini-moon-asteroid-or-spa...

This made me think how the moon's orbit remains stable after so many small objects fly around. I guess they are too small to be significant enough (obviously good).

Re: Fireball Spotted over Northeastern USA

#122

Post by exitb »

nerpderp82 wrote: post #96
infradig wrote: post #91

Earlier quoted context omitted.

A fizzing crackling sound?

Crossed with a low frequency white noise like howl. I see "with sound" on the meteorite spotter page, but it still seems like it was made up. Interesting, https://adsabs.harvard.edu/full/1932PA.....40..289W#:~:text=... . https://www.science.org/content/article/new-theory-may-expla... . So maybe not.

I'd be very surprised if that's the explanation and would rather suspect something like the "noisy GIFs"[1], where a strong visual cue may cause the brain to attach a sound that sounds reasonable.

That's also quite easy to verify - since we have visual sky surveillance, why not add microphones and confirm it really happens, no need to rely on random reports.

[1] https://www.reddit.com/r/noisygifs

Re: Fireball Spotted over Northeastern USA

#124

Post by LeonB »

andrewstuart wrote: post #116
LeonB wrote: post #108

Earlier quoted context omitted.

“The 1978 New South Wales fireball“ 4:44am I think - would’ve been visible from Merewether > Abstract A very large meteor fireball passed through the atmosphere above the east coast of New South Wales early in the morning of 7 April 1978. It was seen at 04.44 AEST (18.44 UT, 6 April) by hundreds of people from the cities of Sydney and Newcastle who deluged the news media with telephoned sightings. The resulting publi…

Nice research! However 40 years ago was 1983 so unlikely to be same event.

This article

https://trove.nla.gov.au/newspaper/article/127209576?searchT...

mentions:

“On June 19 last, a brilliant fireball was seen over a large part of NSW and the ACT”

…from 1985 referring back to 1984.

But most newspapers from that era not searchable yet. We have to get older first.

Re: Fireball Spotted over Northeastern USA

#126

Post by chaxor »

1vuio0pswjnm7 wrote: post #118
notyourwork wrote: post #30

Earlier quoted context omitted.

Damn YouTube is pushing the ads these days. I don't remember last time I opened YouTube and didn't see an ad on open. I'm logged into Chrome, no VPN or funny business. What a racket.

One of many possible solutions. This one no Javascript, no browser extensions, no Python, no libcurl, no "subscriptions", no BS. #!/bin/sh x(){ bssl client -connect www.youtube.com:443;}; x(){ openssl s_client -connect www.youtube.com:443 -ign_eof;}; read x; printf "%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n%s\n" \ "POST /youtubei/v1/player?key=AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w HTTP/1.1" \ "Host: www.youtube.com" \ "…

I don't know anything about web tbh - what is that "key=AIzaSy[...]" bit? Is that a user id for duckduckgo private watching type of thing?

Re: Fireball Spotted over Northeastern USA

#127

Post by [deleted] »

andrewstuart wrote: post #68

I saw a meteor once when I was a kid. I was on the beach and it streaked across the sky and exploded into a bunch of other things that streaked a little further and faded out. I never really told anyone because it seem so preposterous that I wasn't really sure I had seen it at all. It was well out over the over the ocean a number of kilometeres and up very high - zero chance it was fireworks and there weren't ny on t…

[deleted]

Re: Fireball Spotted over Northeastern USA

#128

Post by 1vuio0pswjnm7 »

chaxor wrote: post #126
1vuio0pswjnm7 wrote: post #118

Earlier quoted context omitted.

One of many possible solutions. This one no Javascript, no browser extensions, no Python, no libcurl, no "subscriptions", no BS. #!/bin/sh x(){ bssl client -connect www.youtube.com:443;}; x(){ openssl s_client -connect www.youtube.com:443 -ign_eof;}; read x; printf "%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n%s\n" \ "POST /youtubei/v1/player?key=AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w HTTP/1.1" \ "Host: www.youtube.com" \ "…

I don't know anything about web tbh - what is that "key=AIzaSy[...]" bit? Is that a user id for duckduckgo private watching type of thing?

No, nothing personally identifiable about the so-called key. Every person who visits www.youtube.com uses the same one; it's public. Anyone can see it in the HTML page source for www.youtube.com. No need to be "logged in" or whatever the latest scheme is to track people for advertising purposes.

Re: Fireball Spotted over Northeastern USA

#129

Post by rob74 »

vba616 wrote: post #57
FPGAhacker wrote: post #31

Earlier quoted context omitted.

Do meteors ever hit the atmosphere at low speed?

Yes, relatively speaking. First likely hit I found: "Meteors enter the atmosphere at speeds ranging from 11 km/sec...to 72 km/sec ... The wide range in meteoroid speeds is caused partly by the fact that the Earth itself is traveling at about 30 km/sec (67,000 mph) as it revolves around the sun. On the evening side, or trailing edge of the Earth, meteoroids must catch up to the earth’s atmosphere to cause a meteor, an…

The "relatively slow" 11 km/sec is still 39.600 km/h, or around Mach 30 (although that depends on air density and temperature), so still pretty fast I would say...

Re: Fireball Spotted over Northeastern USA

#130

Post by orbital-decay »

kristopolous wrote: post #53
kibwen wrote: post #18

Earlier quoted context omitted.

People have had ubiquitous cameras in their phones for a decade, but these fireballs happen way too fast to whip out your phone. The reason that we're seeing them more these days is because of the increasing prevalence of dashcams and home security cameras.

That's probably why the Russian one is so well documented. They have a dashcam culture

Had. It was a fad related to the scammers on the roads, and peaked a decade ago. Scammers disappeared/shifted to something else, barely anyone drives with a dashcam now.
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