ASTEROIDAL OCCULTATION - REPORT FORM

   +------------------------------+  +------------------------------+

   |             EAON             |  |            IOTA/ES           |

   |                              |  |  INTERNATIONAL  OCCULTATION  |

   |     EUROPEAN  ASTEROIDAL     |  |      TIMING ASSOCIATION      |

   |     OCCULTATION  NETWORK     |  |       EUROPEAN SECTION       |

   +------------------------------+  +------------------------------+

1 DATE: 18 Mar 2007  STAR: UCAC2 41689535  ASTEROID: Isis Nr: 42

2 OBSERVER: Name: Igor V. VINYAMINOV  Abbr: IVY  Phone: +7(4732)537554

            Address: ul. Michurina, 10; Voronezh; 394089 Russia

            E-mail: igordelta@mail.ru

3 OBSERVING STATION: Voronezh         Nearest city: Voronezh

  Station: Latitude:  51o42'53.3"N  Longitude: 39o13'55.2"E  Altitude: 145 m

  How determined: GPS 'Garmin'; datum WGS84

  Accuracy: Latitude +/-0.4", Longitude +/-0.4", Altitude +/-7 m

  Single, OR Double or Multiple station (Specify observer's name): Single

4 TIMING OF EVENTS        OCCULTATION RECORDED:           *NEGATIVE*

  Type of event

Start observation   Interrupt-start   Disappearance   Blink   Flash

End observation     Interrupt-end     Reappearance    Other (specify)

  (Personal Equation Subtracted: No)              Comments

Event  Time(U.T.)  P. E.   Acc.              (If you need more space,

code   HHMMSS.ss   S.ss    SS.ss             please write at the back)

  S    221204.00    -      01.00

  E    221314.00    -      01.00

Was your reaction time applied to the above timings?  NO

5 TELESCOPE   Type: Newtonian  Aperture: 200 mm   Magnification: 100x

   Mount:     Dobsonian                           Motor drive:  none

6 TIMING & RECORDING

   Timekeeping: Time-signal Station:  RWM 4996 kHz

                or Other:

   Mode of recording:                 Device of recording:

     X  Stopwatch                       X  Visual

     O  Tape                            O  Television

     O  Eye-ear-method                  O  Photometer

     O  T-Recorder (Chart)              O  Other (specify)

     O  Other (specify)

7 OBSERVING CONDITIONS

   Atmospheric transparency: high       Wind: 0 m/s      Temperature: -1C

   Star image stability:     high       Minor planet visible: No      

8 ADDITIONAL COMMENTS

   Limiting stellar magnitude: 12m.

   Star magnitude 12.1m.  Elevation 21 deg.

   Asteroid magnitude 12.9m.

   Combined 'star&asteroid' magnitude 11.7m.

   Sun: elongation 98 deg, altitude -38 deg.

   Moon below horizon.

   Distance from the predicted path center: 188 km south-west.

   Predicted path width: 152 km.

   Path error (1 sigma): 56 km.

   Predicted event probability: 2 percent.

   Expected event time: 22h12m30s +/- 12s (3 sigma).

   Maximum expected event duration: 9.4s.

   Degree character is represented by lowercase 'o'

The report is prepared by Aleksey Losyuk.