ASTEROIDAL OCCULTATION - REPORT FORM +--------------------------------+ +----------------------------------------+ | EAON | | IOTA/ES | | | | INTERNATIONAL OCCULTATION | | EUROPEAN ASTEROIDAL | | TIMING ASSOCIATION | | OCCULTATION NETWORK | | EUROPEAN SECTION | +--------------------------------+ +----------------------------------------+ 1 DATE: 22 November 2021 STAR: UCAC4 572-009201 ASTEROID: (88757) 2001 SS61 2 OBSERVERS: Name : Wojciech Burzynski Abrr: BZY Address : 15-345 Bialystok, Poland 3 OBSERVING STATION: Nearest city : Suprasl Station : Lipowy Most Acc. Latitude : 53 12 31.5 N - 0.1" Longitude : 23 31 37.9 E - 0.1" Altitude : 145 MSL - 1 m Datum (WGS84 preferred): WGS84 Single, OR Double or Multiple station (Specify observer's name): single 4 TIMING OF EVENTS: +----------------------------------------------+ | OCCULTATION RECORDED: NEGATIVE | +----------------------------------------------+ Type of event: "S"tart observation "I"nterrupt-start "D"isappearance "B"link "F"lash "E"nd observation "J"nterrupt-end "R"eappearance "O"ther (specify) Event Time (UT) P.E. Acc. Code HH MM SS.ss S.ss S.ss S - 17:40:03.4 E - 17:42:02.6 Predicted max. duration (secs) : 0.31 Predicted max. drop (mag) : 6.4 Predicted mid-event (UT) : 17:41:07 Predicted error in time : ca 7 sec Was your reaction time applied to the above timings? - not relevant 5 TELESCOPE: Type : NEW f/4.7 Aperture : 254 mm Focal length: 1195 mm FOV : 32.37' x 20.23' Mount : equatorial GOTO Motor drive: yes 6 TIMING & RECORDING: Time source : GPS 1PPS Sensor : QHY 174M GPS Mode of recording: 1920x1200, 12 bit FITS, bin 2x2, Gain=480 Mode of recording: Contrast=0, Brightness=0, Gamma=1, USB traffic=50 Shutter : 0.08 s Recording : Laptop Dell Latitiude 3540 (Intel Core i5/RAM 16 GB/SSD 480 GB) Recording : SharpCap 4.0.8365 7 OBSERVING CONDITIONS: Atmospheric transparency : poor, through a thin fog Wind (m/s) : 5 Temperature (deg C / humid.) : 0 / 90 Star image stability : good Minor planet visible : no Local conditions (degree) : star altitude: 32, sun altitude: -29 Local moon conditions (degree) : moon altitude: 11, moon dostance: 35, moon phase: -90% 8 ADDITIONAL COMMENTS: Observed star : UCAC4 572-009201 Star magnitude (mag) : 12.2 Minor planet magnitude (mag) : 18.6 Feed : own computation based on EDR3/HORIZON JPL#20 from Nov 7, 2021 Distance (km) : In 2-sigma zone, 45 km from the center line, 43 km from the shadow path Shadow width (km) : 4 Asteroid diameter (km) : 2.4 Predicted probability Occult(%) : 2 Faintest star on movie (mag) : 13.0 Evaluation with Tangra 3.7.3 9 REMARKS: