ASTEROIDAL OCCULTATION - REPORT FORM


EAON & IOTA/ES 

1. DATE: 2022 Aug 17  STAR: TYC 6322-00932-1  ASTEROID: (10923) 1998 BM12	

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: 448 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  -  22:23:51.00 -  
    D  -  22:24:17.37  +/- 0.06s
    R  -  22:24:18.09  +/- 0.06s
    E  -  22:24:52.00       
  
        Duration :   0.72 s +/-0.12
        Mid-event : 22:34:17.73 +/-0.6s

  
5. TELESCOPE 

   Type: Newton   
   Aperture: 400 mm 
   Focal length: 1800 mm
   Mount: Azimutal, Sky-Watcher 
   Motor drive: Yes

6. TIMING & RECORDING

   Time source: SNTP (NetTime 3.20 Alpha3) 
        Sensor: ZWO ASI 178MC
        Recording:  exposure 120 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: medium
   Temperature: 19 deg Celsius
   Minor planet visible: no
   Event in altitude: 18° 


8. OBSERVATION QUALITY: good


9. ADDITIONAL COMMENTS:
    
  Constellation : Sgr		
  Distance from center line: 50 km
  Event probability at site: 9.2%
  Star magnitude: 11.6
  Asteroid magnitude: 19.3
  Predicted mag.drop: 7.6