IOTA Membership and …

                                                IOTA Membership and
                                               Observer Information Form
                                                           Version 2007.03




Name:                                                    Telephone:

Address:

City:                                 State/Province:                        Zip:

Country:                                       Email:

Latitude:                         Longitude:                                 Elevation:        feet

Grazing Occultations:
   What is the greatest distance, in miles/kilometers, you would be willing to travel in order to
   observe grazing occultations:                       miles

   Telescope aperture:             inches

   What is the magnitude of the faintest star, you want predictions for?

   Check here if you do not need grazing occultation predictions:

IOTA Membership Type:
     $30 US for IOTA membership in North America ($35 overseas)
     Membership includes: subscription to ON/supplements by mail, as well as detailed graze
     predictions and local circumstances for approaches of asteroids to stars by email.

        $20 US for ON and supplements by mail in North America ($25 overseas)

        $15 US for online access to ON and detailed graze predictions by email

Mail your membership dues (check payable to IOTA) to the address below or via our website at
www.occultations.org.

Comments or Further Details:




Mail To:       IOTA Secretary/Treasurer
               PO Box 6356
               Kent, WA 98064-6356
               U.S.A.
                       Instructions for Observer Information Form

Telephone: Give home telephone number first, if more than one.


Address: Give home or office address, whichever you prefer. If you are a student or otherwise
living predominantly at another address from September through May, give this other address and
the telephone number there in the COMMENTS section. If you move, please submit a new form.


Latitude/Longitude: If you have not, cannot, and do not intend to time any total occultations to
the necessary accuracy (accurate to at least nearest 1/2 second), an approximate position, such as
taken from supplied occultation predictions will suffice. However, if you do, or soon will time total
occultations, the position should be reported at least to the nearest second of arc (1") or nearest
0.0001 degrees in latitude and longitude, and to the nearest 30 feet (10 meters) in elevation above
sea level. Please provide the source of position determination in "Comments or Further Details".


Grazing Occultations: Check the appropriate box if you do not need graze predictions. Otherwise,
please complete the rest of this section. In estimating the greatest distance you would be willing to
travel, assume the most convenient time, since the computer program does not test for holidays or
weekends. Predictions for 3 miles beyond the specified radii will be computed, to allow for the fact
that the lunar profile might show that multiple events can be seen as far as 3 miles from the
predicted limit.

When selecting travel radii and magnitudes, keep in mind that about one favorable graze and two
marginal ones occur each month for each 100 miles of radius for latitude 30°. Higher latitudes have
fewer events (about half as many at 55°). The frequency of observable events is also reduced
significantly in most places by the weather.

Please give telescope aperture in cm or state units given.


IOTA Membership Type: ON is the quarterly distributed Occultation Newsletter. Online
members will be contacted via email for access to www.occultations.org . Requests for online
access can be emailed to business@occultations.org .