(meteorobs) Large fireball over Arizona Dec 11 2013 - video from near Santa Fe
Jay Salsburg
jsalsburg at bellsouth.net
Thu Dec 12 05:03:56 EST 2013
The source of the Graphic in the link below is from the PC App Stellarium at
http://www.stellarium.org
-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of Steve Witt
Sent: Wednesday, December 11, 2013 5:22 PM
To: Meteor science and meteor observing
Subject: Re: (meteorobs) Large fireball over Arizona Dec 11 2013 - video
from near Santa Fe
Hi Jodie,
I run Node 18 in Lake Station, In. I was wondering how you generated the
attached image?
Best,
Steve
Steve Witt
IMCA #9020
http://imca.cc/
----- Original Message -----
> From: Jodie Reynolds <spacerocks at spaceballoon.org>
> To: Jim Wooddell <nf114ec at npgcable.com>
> Cc: Meteor science and meteor observing <meteorobs at meteorobs.org>
> Sent: Wednesday, December 11, 2013 2:30 PM
> Subject: Re: (meteorobs) Large fireball over Arizona Dec 11 2013 - video
from near Santa Fe
>
> Hello Jim,
>
> Let me first take the opportunity to ask other camera owners a favor:
>
> Please go toss a black plastic trash bag or a blanket or something
> over your camera some evening and record thirty seconds or so of
> nothing but that black cover. This creates dark frames, and allows us
> to stack your video to acquire more reference objects while
> simultaneously allowing us to subtract the hot and dead pixels (some
> of these cameras have a lot). My cameras, with the exception of the
> Sandia Sentinel camera, are pixel mapped in the camera - subtraction
> happens before it even reaches a recorder.
>
> Bonus points for recording a minute of video a few times over a few
> separate nights with no events and no moon, then storing them with
> precise time and date. These allow us to stack the frames and build a
> known calibration profile.
>
> In Thomas' example:
> East/West are mirrored, and the distortion of the lens isn't too bad,
> although down in that corner like that you're never going to get
> _that_ close for such a short event. The moon is a little lower than
> I'd expect suggesting some stretching out at the edges that would need
> to be corrected. Without another camera that can see the event
> through the region of critical focus, I doubt anyone would make it
> very far though.
>
>
>
> Here's his sky with grid marking, close enough for the data that's
> there:
>
> http://www.spaceballoon.org/20131211_021057AZ8361_Ashcraft-Sky.png
>
>
> --- Jodie
>
> Wednesday, December 11, 2013, 11:57:23 AM, you wrote:
>
>> Hello Thomas,
>
>> Can you please provide a calibrated Azimuth and Elevation for the
>> Beginning and End of this event, please?
>
>> Thanks!
>
>> Jim Wooddell
>
>
>> On 12/11/2013 8:43 AM, Thomas Ashcraft wrote:
>>> Dec 11 2013
>>>
>>> My all-sky camera caught the large fireball over southern Arizona
>>> at
>>> 02:10:57 UT. The fireball was over 350 miles from my observatory.
>>>
>>> Not sure if there might be any useful data since it is miniscule at
>>> the edge of my field of view.
>>>
>>> In the video the meteor appears at lower screen right passing near
>>> the bright dot which is Venus. NOTE: The Moon is at low screen
>>> center,
>>> *not* to be confused with the fireball please.
>>>
>>> http://www.heliotown.com/FBns20131211_021057ARIZ8361_Ashcraft.mp4
>>>
>>> Thomas Ashcraft - Heliotown - New Mexico
>
>> _______________________________________________
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>> meteorobs at meteorobs.org
>> http://lists.meteorobs.org/mailman/listinfo/meteorobs
>
>
>
> --
> Best regards,
> Jodie mailto:spacerocks at spaceballoon.org
>
>
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