Finder charts for April 27 asteroid occultation event

PTS

Hi,
Here are the finder charts for the April 27 event.  These charts are 15 x 15 arcmin. Details as follows:

IOTA/IOTA-ES occultation update for
      (227) Philosophia / TYC 1888-01518-1 event on 2008 Apr 27, 12:04 UT
                   Visible from Philippines, China, Hong Kong


Summary
-------
On 2008 Apr 27 UT, the 87 km diameter asteroid (227) Philosophia will occult a
11.0 mag star in the constellation Gemini for observers along a path across
Philippines, China, Hong Kong.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 4.0 mag to 15.0 mag (the magnitude of the asteroid) for at most 3.1
seconds.

This update is based on UNSO/Flagstaff astrometry for the asteroid kindly
provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill
Owen, historical astrometry from the MPC files (via AstDys), and the following
catalogs for the star position: UCAC.

The event at a glimpse
----------------------
    * Rank: 85
    * date and approx. time of event: 2008 Apr 27, 12:06  - 2008 Apr 27, 12:08  UT
    * midpoint of event [JD]: 2454584.003375
    * magnitude of target star: 11.0
    * magnitude drop [mag]: 4.0
    * estimated maximum duration : 3.1
    * Moon: 61 % sunlit, 164° distance
    * Sun: 62° distance
    * rough path description: Philippines, China, Hong Kong

The occultation path
--------------------
    * approximate projected width [km]: 89
    * 1 sigma uncertainty interval [path widths]: +/- 0.60
    * 1 sigma uncertainty interval [seconds]: +/- 1.8
    * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .021 +/- .020)
    * 1 sigma uncertainty ellipse (major, minor, PA): ( .021", .020", 95° )
    * approx speed of asteroid's shadow [km/s]: 28.0781
    * website for maps:
          http://www.asteroidoccultation.com