First-time observers are encouraged to read the general visual observing pages first.
World-wide meteor observations are collected in the
Visual Meteor Database (VMDB). The global set of data
is the only chance to obtain a full activity profile
of a meteor shower. The input of all observers is
greatly appreciated. In order to allow for a maximum
scientific output of the VMDB, please have a look at
the following recommendations.
- A breakdown into short observing periods is
essential for a detailed analysis of the meteor shower.
The suggestion is to give 5-MINUTE COUNTS for the
Geminids and non-Geminids (or other showers if you
watch out for them). The number of meteors is prob-
ably less than 10 in most of these bins, but remember
we collect a large number of world-wide data which
all add to each other.
The essential period for these fine bins will be
roughly Dec 13, 10h UT (American morning hours of
Dec 12/13) to Dec 14, 10h UT. - Meteor magnitudes give additional information
to the pure activity counts. If you estimate magni-
tudes for each Geminid seen, please make magnitude
DISTRIBUTIONS FOR EACH OF THE 5-MINUTE BINS. - Just a reminder that cloud interference or other
obstructions refer to the typical field of view, which
is a bit larger than 100 degrees diameter. If something
covers 10% of the entire sky, it is unlikely that it
really blocks that much of your effective field of view. - A typical form with some lines of examples is at
http://www.imo.net/visual/report
There is no need to copy the form exactly, just the
order of the information should be similar. - Simpler reports than that are most welcome, too.
Please make sure you have the date, your name, loca-
tion, limiting magnitude, and SHORT COUNT BINS in the
report.
At times for which the data analysis resolves struc-
tures as short as say 10 minutes, observing periods
of 1 hour duration will smear out the information.
They have to be excluded from the analysis. Combining
5-minute observing bins into 1-hour periods is always
possible. Please remember to record and report 5-min
bins.
Clear skies and good luck!