1 DATE : 26/AUG/2003
  STAR : TYC 5757-00353-1
  ASTEROID : (490) BERTHOLDA

2.OBSERVER:
 Name: Stefano SPOSETTI
 Address: CH-6525 Gnosca, Switzerland
 E-mail: stefanosposetti@freesurf.ch

3.OBSERVING STATION:
 Nearest city: CH-6500 Bellinzona
 Station: Gnosca Observatory
 Latitude: 46deg 13min 54sec (N)
 Longitude: 9deg 1min 30sec (E)
 Altitude: 260 m
 Single/Multiple: single

4.TIMING OF EVENTS:
 Occultation recorded: NO

5.TELESCOPE:
 Type: Newtonian
 Aperture: 40cm
 Magnification: -
 Mount: equatorial
 Motor drive: no

6.TIMING & RECORDING:
 Timekeeping: portable clock, DCF77 radiocontrolled
 Mode of recording: CCD scan
 Device of recording: CCD

7.OBSERVING CONDITIONS:
 Atmospheric transparency: good
 Wind: no
 Star image stability: good
 Temperature: 24 deg C

8.ADDITIONAL COMMENTS:
Due to CCD "drift scan" mode I observed no occultation in seven 70-seconds intervals.
U.T. intervals :
from 21:39:27  to 21:40:37
from 21:40:47  to 21:41:57
from 21:42:07  to 21:43:17
from 21:43:27  to 21:44:37
from 21:44:48  to 21:45:58
from 21:46:08  to 21:47:18
from 21:47:28  to 21:48:38
Precision of time measurement: +-1sec.