ASTEROIDAL OCCULTATION - REPORT FORM


EAON & IOTA/ES 

1. DATE: 2022 Aug 15  STAR: TYC 2395-00468-1  ASTEROID: (1116) Catriona	

2. OBSERVER: 

   Name: Marcin Filipek  Abbr: FIM 
   Adress: 32-048 Jerzmanowice, Poland
   Phone: +48 502 084 115
  
3. OBSERVING STATION: Jerzmanowice

   Nearest city: Krakow, Poland
   Station: Latitude:  50° 12 43.9 N 
            Longitude: 19° 45 02.8 E 
   Altitude: 450 m
   WGS84, GPS meas  

4. TIMING OF EVENTS OCCULTATION RECORDED : P O S I T I V E

Event code
	S: observation Start   I: Interruption start
	D: Disappearance       J: Interruption end
	R: Reappearance        B: Blink   F: Flash
	E: observation End     O: Other (specify)
  
                                              
  Event   Time (UT)    P.E.   Acc.   
  Code   HH:MM:SS.ss   S.ss   S.ss

    S  -  23:20:00.00   
    D  -  23:20:44.34   +/- 0.01s
    R  -  23:20:45.39   +/- 0.01s
    E  -  23:21:30.00       
  
        Duration :   1.05 s +/-0.02s
        Mid-event : 23:20:44.87  +/- 0.01s

  
5. TELESCOPE 

   Type: Newton   
   Aperture: 250 mm 
   Focal length: 1000 mm
   Mount: Equatorial, Sky-Watcher EQ6
   Motor drive: Yes

6. TIMING & RECORDING

   Time source: SNTP (NetTime 3.20 Alpha3) 
        Sensor: ZWO ASI 178MC
        Recording:  exposure 20 ms  
        Recording device: laptop HP, SharpCap 4.0 (Windows10)
        Time  insertion: laptop clock corrected flashing LED GPS-inserter


7. OBSERVING CONDITIONS

   Atmospheric transparency: good   
   Wind: no
   Star image stability: good
   Temperature: 20 deg Celsius
   Minor planet visible: no
   Event in altitude: 20° 


8. OBSERVATION QUALITY: good


9. ADDITIONAL COMMENTS:
    
  Constellation : Aur		
  Distance from center line: 22 km
  Event probability at site : 79.1 %
  Star magnitude: 8.8
  Asteroid magnitude: 14.8
  Predicted mag.drop: 6.0

Secondary mag drop at 23:20:42 UT.
It's hard to tell if it's a double star or noise or atmospheric scintillation.
In this case, it is necessary to know the limiting brightness of the stars in the recording in order to conclude that the star is double.