(meteorobs) Geminids from Greece

jackob strikis jdstrikis at yahoo.com
Mon Dec 15 19:39:13 EST 2008

Dear all !!!!

I must say that I am impressed from your kindness and from the interest that you saw to me (that I am a new observer).... Alow me to tell you a small story about Greeks.
   A few years ago I have tryed to make some visual observing of a meteor shower, so I took my pensils and my pappers and went out for observing... After the end of my observing session I sented the form to Mr. Rainer and a Greek expertee (no name for him) to help me both.... The answer to my observation from Mr. Rainer was about 1+1/2 pages of advises and how to fix my mistakes and the answer from Mr.X (greek expertee) was "J.D. YOUR OBSERVATION IS NOTHING MORE THAN JUNK" .........

   This is why I wanted to thank you all for your help and I hope soon to see some of you in the next IMO conf. 
   As for my camera now & the lens.... For now I will have to stay with the 3.0mm lens because of the missing money from my pocket (mirrors are off too).. Then I would like to ask you what kind of hardware do I need to conect that serveilance camera to my PC (the signal from my camera is a "video out" (I got the camera used by a small company in my area who recently changed this one for a colour one).
    Here is also a picture of that camera if that helps you. http://www.freewebs.com/elizabethobservatory/IMG_5584.jpg 

Clear sky to all with a lot of fireworks....

PS: Sorry about my english but us I usualy say I did not had my mind to teachers ... But always in the stars....

From: Chris Peterson <clp at alumni.caltech.edu>
To: Global Meteor Observing Forum <meteorobs at meteorobs.org>
Sent: Tuesday, December 16, 2008 1:22:40 AM
Subject: Re: (meteorobs) Geminids from Greece

I'd strongly advise against using a reflector. Good CS-mount fisheye lenses 
are quite inexpensive, and have huge advantages. In particular, it is nearly 
impossible to accurately determine the position of a meteor in the sky with 
a reflector, because they don't have well controlled surfaces. That's not a 
problem with a lens, which can be astrometrically calibrated. If you plan on 
doing multistation work, with the intent of recovering meteorites or 
recovering orbits, convex mirror systems really make things difficult.


Chris L Peterson
Cloudbait Observatory

----- Original Message ----- 
From: "stange" <stange34 at sbcglobal.net>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: Monday, December 15, 2008 11:48 AM
Subject: Re: (meteorobs) Geminids from Greece

> Hello J.D.
> Sounds like you purchased a JBD CB-23803(S?) 1/3" CCD B/W camera with 
> 0.003
> Lux rating. Using the camera with the zoom lens will confine the field of
> view(FOV) into a rectangular shape. Lowering the zoom to 3.0 will give the
> widest FOV but still rectangular because of the CCD substrate shape.
> An "ALL-SKY" option for the future would be to use a highly polished 
> "moon"
> hub-cap from a car, or better yet, a hemispherical mirror dome(the bigger
> the better), with the camera mounted downward over it. Similar 
> construciton
> to what I have illustrated at:
> http://www.geocities.com/stange34@sbcglobal.net/IR_Experiment.html or the
> earlier design used by Chris at Cloudbait Observatory.
> If you do go in this "ALL-SKY" mirror direction, the height of the camera
> over the mirror for imaging the entire perimeter of the mirror, will be
> determined by the amount of zoom.
> The higher the magnification, the higher will the camera need to be over 
> the
> mirror to get the entire image of the mirror circle which contains a 360
> degree all-sky view.
> Most folks try to use around a 4mm adjustment which will keep the camera
> lower but at the expense of slightly larger central obstruction which is 
> the
> image of the camera in the mirror itself.
> Using inexpensive ($40 U.S.) programs like Handyavi will give you
> satisfaction in captures.
> Try the program for free at their website download to see if your 
> composite
> capture card can work with that program. You may have to experiment a 
> little
> with comuter settings and Handyavi settings. Generally if Windows XP can 
> see
> the mirror image, so will Handyavi.
> Good Luck, YCSentinel.

Mailing list meteorobs: meteorobs at meteorobs.org
To UNSUBSCRIBE, email: owner-meteorobs at meteorobs.org


More information about the Meteorobs mailing list