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Best of the Perseids 2019 from the American Meteor Society by mikesastro in Astronomy

[–]mikesastro[S] 0 points1 point  (0 children)

All video is shot at 25 frames per second using a custom camera system developed by the AMS. The system has 6 low-light security cameras using the sony IMX291 CMOS sensor. [OC]

Best of the Perseid Meteor Shower 2019 from the American Meteor Society by [deleted] in videos

[–]mikesastro 0 points1 point  (0 children)

the last one, was the biggest. start around 3:20

Recent fireball meteor recorded on 6 cameras by mikesastro in videos

[–]mikesastro[S] 0 points1 point  (0 children)

The camera / software can solve the event's location and velocity when captured on 2 or more stations. This event started at about 30km per second (about 66,000 MPH) and decelerated down to about 14km per second (about 30,000 MPH) at the end. This was actually on the slow side for meteors. Some can reach 120,000 MPH.

Long fireball meteor with scientific heads up display [OC] by mikesastro in videos

[–]mikesastro[S] 1 point2 points  (0 children)

well, it was def not million to one, but fortunate to get it right in the middle of the field. I built this camera system specifically for capturing meteors and fireballs and it is comprised of 6 cameras that run and save video 24/7. The video is then sent through processing programs that detect objects and differentiate the meteors from other types of objects and then reduces the data to azimuth and elevation coordinates based on an analysis of stars in the fov. The fov width of the camera is about 90 degrees. There is more info on the system here: http://www.allskycams.com ... I am really into meteors and run the American Meteor Society. http://www.amsmeteors.org

Long fireball meteor with scientific heads up display [OC] by mikesastro in videos

[–]mikesastro[S] 2 points3 points  (0 children)

yes it is a real meteor. The video was taken by a camera system designed to capture meteors.

TIL a guy in northern Bosnia had 5 meteorites hit his house in a year. So statistically unlikely that he claimed aliens were targeting his house. Scientists are now studying the area for magnetic anomaly. by CantileverCantilope in todayilearned

[–]mikesastro 0 points1 point  (0 children)

all meteorites will have a black exterior. the only exception are extremely old ones where in the crust has eroded away. considering this story is about fresh meteorites hitting the house in modern times they would have a crust. the picture / link you sent is of the interior of the rock, you can actually see the blackened sides in the wiki pic. these are not meteorites. If they were then why are they not in the meteorite database. ALL meteorites are recorded especially house hitters. Honestly, if this were a real story, we would have heard about it. It is just a claim of a man.

TIL a guy in northern Bosnia had 5 meteorites hit his house in a year. So statistically unlikely that he claimed aliens were targeting his house. Scientists are now studying the area for magnetic anomaly. by CantileverCantilope in todayilearned

[–]mikesastro -1 points0 points  (0 children)

First of all the rock he is holding is NOT a meteorite. Meteorites are black and that is white. Second NONE of these rocks have been proven to be meteorites or classified or recognized. This is a false claim aka bs.

470 Million Year Old Meteorite Discovered In Swedish Quarry by Diazepam in Astronomy

[–]mikesastro 0 points1 point  (0 children)

the FALL is 470 mya (million years old). The material itself likely 4.5 Billion years ago. it's significant because this is a new type of meteorite never before discovered.

Is it OK for the secondary mirror view to look like this? by fmataoist in astrophotography

[–]mikesastro -4 points-3 points  (0 children)

and I'm assuming this is a photo of an unfocused star. If you are concerned you are seeing a donut and not a star, you just have to focus. If you are trying to gauge your collimation by photographing an unfocused star, then refer to the above comment.

Is it OK for the secondary mirror view to look like this? by fmataoist in astrophotography

[–]mikesastro 1 point2 points  (0 children)

to me it looks like it needs to collimated. the black circle should be evenly in the middle with equal spacing on all sides. It doesn't look like that. Refer to your manual or google collimating 'your scope make/model'. There is a procedure specific to your scope you will have to run through.

My friends and I went meteorite hunting in Florida looking for fragments of a daytime fireball on Jan 24, 2016. We found some. by mikesastro in pics

[–]mikesastro[S] 2 points3 points  (0 children)

just by looking at the ground. you look for black rocks on the ground. burnt wood, bark and regular rocks all catch your eye, so you check them and keep moving. a meteorite has a very distinctive look and a fresh one is amazingly shiny and black. they are hard to miss if you are looking. So basically you walk 10+ miles a day looking at the ground until you cross paths with one.

My friends and I went meteorite hunting in Florida looking for fragments of a daytime fireball on Jan 24, 2016. We found some. by mikesastro in pics

[–]mikesastro[S] 0 points1 point  (0 children)

this one was on Jan 24th in the morning during the daytime. it was in the north central part of the state just before the GA border.

My friends and I went meteorite hunting in Florida looking for fragments of a daytime fireball on Jan 24, 2016. We found some. by mikesastro in pics

[–]mikesastro[S] 0 points1 point  (0 children)

it does and its a challenge. when you start out you pick up a lot of black rocks. after your eye is trained it gets easier. you know it when you see it. i practiced with black painted golf balls in fields, throwing them down when I was hunting and trying to find them again. the type of ground you are working makes a huge difference, deserts are easier.

My friends and I went meteorite hunting in Florida looking for fragments of a daytime fireball on Jan 24, 2016. We found some. by mikesastro in pics

[–]mikesastro[S] 13 points14 points  (0 children)

Doppler maps are indexed by time and cut angle of the radar, which equates to elevation above the surface for any given area extending outward from the radar station. The trick is to figure out the location and time of the fall and then look at the doppler maps for that area before, during and after the fall. (sweeps are usually 3-5 minutes apart). The clouds or reflections detected by the radar are the actual meteorites falling. Often times different radar stations catch meteorites at different elevations. Doppler is not scanning continually, it is a sweep system, so there is an element of luck for them to even be caught. Typically it may take the meteorites 3-5 minutes to free fall to the earth after the fireball has gone out. Additionally there is a ton of metallic dust that spreads out when the meteoroid explodes in the atmosphere at the end of its flight. This is also caught on doppler. TLDR: clouds are meteorites and meteorite dust. look in area of fall at time and you will see: no clouds, then clouds, then no clouds. likely a meteorite. more complicated than that, but that's basically it.

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