(meteorobs) Sentinel website now on line. New URL.

[Larry]

Yes. There are three ways.

One is astrometric, using stars for positioning. This is what Chris of 
Cloudbait I think does by pre calibrating his image locations in X-Y 
dimensions aforehand, then uses current star positions at the event time to 
convert. A very difficult & sophisticated method. (I do not attempt this) 
Chris may want to refine what I think I understand of his methods.

Another is to create a transparent scale for images in Azimuth & Altitude, 
then convert that with astronomy programs to a close RA & Dec. I do this 
sometimes when I need to estimate RA & Dec. Alt. & Azimuth is easier.

Another is (if your site has good visibility), is to use stars in the 
photograph to determine RA & Dec. I do not have a good enough location or 
the skills for this.

There is no simple way to my knowledge to obtain RA & Dec because it is 
constantly changing with time at any location and there is a lens 
compression error to be considered too.

YCSentinel


----- Original Message ----- 
From: <GeoZay at aol.com>
To: <meteorobs at meteorobs.org>
Sent: 2009/06/02 20:31
Subject: Re: (meteorobs) Sentinel website now on line. New URL.


>>>Pictures of significant (larger) fireballs will be added and  announced
> in
> the news section.>>
>
> Out of curiosity, can you guys actually tell  from these photos the RA and
> Dec of a meteor's beginning and end points? If  so...how?
> geozay
>
>
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