(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
>>
>>> _______________________________________________
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>>> meteorobs at meteorobs.org
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>>
>>
>>
>> --
>> Best regards,
>> Jodie mailto:spacerocks at spaceballoon.org
>>
>>
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--
Best regards,
Jodie mailto:spacerocks at spaceballoon.org
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