(meteorobs) Large fireball over Arizona Dec 11 2013 - video from near Santa Fe

Jodie Reynolds spacerocks at spaceballoon.org
Thu Dec 12 05:41:57 EST 2013


Were we talking about the composite, or the sky view?  Yes, the sky
view was generated from Stellarium, but there's lots of planetarium
software out there.

--- Jodie

Thursday, December 12, 2013, 2:03:56 AM, you wrote:

> 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
>> 
>>>  _______________________________________________
>>>  meteorobs mailing list
>>>  meteorobs at meteorobs.org
>>>  http://lists.meteorobs.org/mailman/listinfo/meteorobs
>> 
>> 
>> 
>> --
>> Best regards,
>> Jodie                            mailto:spacerocks at spaceballoon.org
>> 
>> 
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-- 
Best regards,
 Jodie                            mailto:spacerocks at spaceballoon.org



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