Cora»Occultation

2026-09-01 / UCAC4 383-101273 / (13390) Bouska

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jiri Polak	O+	VID	M300	CZ	NTP	20:04:18	20:06:20.39	20:06:20.73	20:08:18	0.020	0.020	0.34	2.7
2	show	Miroslav Polacek	O+	CCD	M114	CZ	PHONE	20:05:21	20:06:18.69	20:06:19.62	20:07:20	0.050	0.080	0.93	7.4

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL66 : 28c85d80-d9af-11f1-43f3-e13aaf7fcc3d [db: observed]

Using prediction 28c85d80-d9af-11f1-43f3-e13aaf7fcc3d for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
X0,Y0 = -3708.7, 18.0 km
Circular diameter = 8 km

From 2 chords (CCD,VID)

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If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 28c85d80-d9af-11f1-43f3-e13aaf7fcc3d [observed] Occultation Date + Time : 2026-09-01 at 20:14:23 UT +/- 0.0 min [1] Object Designation : (13390) Bouska Orbit Class : MBA Star Designation : GDR3 4147545635941843072 Star Coordinates (ICRF) : RA = 18 09 37.1749, DE = -13 32 50.295 [2] Star Magnitudes : G = 12.07 mag, RP = 11.13 mag, BP = 12.97 mag Object Magnitude : V = 17.69 mag Estimated Magnitude Drop : 5.6 mag Estimated Max. Duration : 1.1 sec Object Mean Diameter : 8.7 km (src: astorb) Speed of the shadow : 8.0 km/s Elongation to Moon & Sun : 123° (sunlit = 77%), Sun = 113° Cross-track uncertainty : 0.3 mas = 0 km = 0.05 path-width (1-sig) RUWE and duplicate source : 0.9 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL66 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 28c85d80-d9af-11f1-43f3-e13aaf7fcc3d [observed]

 Occultation Date + Time   : 2026-09-01 at 20:14:23 UT +/- 0.0 min  [1]
 Object Designation        : (13390) Bouska
 Orbit Class               : MBA
 Star Designation          : GDR3 4147545635941843072
 Star Coordinates (ICRF)   : RA = 18 09 37.1749, DE = -13 32 50.295  [2]
 Star Magnitudes           : G = 12.07 mag, RP = 11.13 mag, BP = 12.97 mag
 Object Magnitude          : V = 17.69 mag
 Estimated Magnitude Drop  : 5.6 mag
 Estimated Max. Duration   : 1.1 sec
 Object Mean Diameter      : 8.7 km  (src: astorb)
 Speed of the shadow       : 8.0 km/s
 Elongation to Moon & Sun  : 123° (sunlit = 77%), Sun = 113°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL66
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

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