ASTEROIDAL OCCULTATION - REPORT FORM

    +----------------------------------------+   +----------------------------------------------+
    |                EAON                          |  |                     IOTA/ES                      |
    |                                                   |  |  INTERNATIONAL OCCULTATION   |
    |      EUROPEAN  ASTEROIDAL    |  |          TIMING  ASSOCIATION         |
    |     OCCULTATION NETWORK    |  |          EUROPEAN SECTION               |
    +----------------------------------------+   +----------------------------------------------+

1 DATE: 2021 October      		    STAR : UCAC4 543-009527

  ASTEROID: (22978) Nyrola     

2 OBSERVER: Name:  Gérard VAUDESCAL           Abbr:VDC
            E-mail: gg.vaudescal@free.fr
            Address: 65380 Azereix - France

3 OBSERVING STATION: Nearest city: AZEREIX (65380) - France
  Station: Observatoire d'Azereix (Home)
  Latitude:  N 43 12 35.4 (WGS84)
  Longitude: W 00 00 46.4 (WGS84)
  Altitude: 340 m

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

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4 TIMING OF EVENTS:           |                                                                |
                          		|  OCCULTATION RECORDED: POSITIVE |
                         		|                                                                |
                          		+---------------------------------------------------+
  Type of event
  Start observation   Interrupt-start   Disappearance   Blink   Flash
  End observation     Jnterrupt-end     Reappearance    Other (specify)
                                                  
  Event   Time (UT)   	 Acc.   					Comments
  Code   HH MM SS.ss        S.ss
  
    S  -   21:59:02.0     			on frame n°7   		Times Tangra
    D  -   22:00:16,61	  	         +/-	0,19	              n°207.5	 	      idem
    R  -   22:00:17,55		         +/-   0,19                       n°210		      idem
    E  -   22:01:19.28 	        			on frame n°375		      idem
    
  Duration : 	 0,94   sec   +/- 0,27
	Mid-event: 22:00:17,08        (Pédicted 22:00:16  +/- 5,6 sec UT)

  Was your reaction time applied to the above timings? NO
 
5 TELESCOPE: Type: Ritchey Chrétien RC10  - Aperture: 254 mm  -  Magnification: Focus 1340mm (RCx0,67)  -  F/D=5.27
             Mount: Equatorial   -  Motor drive: YES

6 TIMING & RECORDING: 
  Time source: NTP
  Sensor: CAMERA ASI178MM -  Binning x2  - Pixel depth mono14  - Exposition : 0,373 sec/f  => 2,68 fps
  Gamma na   -    Gain 510 /510   -   Black 122
  Recording: Genika Mode 14bits - format SER 
  Time insertion: windows timestamp by recording sofware .
  Event insertion (specify): PC Core i5 - Windows10 

7 OBSERVING CONDITIONS:  SKY: clear      Cloud : 30%   	Wind: 0 m/s       Temperature: 4,2°C      
  Star image stability:  Medium        Minor planet visible: No

8 ADDITIONAL COMMENTS: Reduction under TANGRA 3.7.3 Rev 20200512
  Predicted Max Duration: 1.4sec  
  Predicted Magnitude Drop: 2.2 mag 

  No corrections applied / the test results show a variation of +/- 10ms whatever the exposure times between   20  and 700ms