Cora»Occultation

2025-08-12 / UCAC4 410-097463 / (13568) 1992 WL3

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Andreas Schweizer	O+	VID	M250	CH	GPS	21:00:33	21:01:03.671	21:01:05.356	21:01:33	0.200	0.200	1.68	14.1
2	show	Anna Marciniak	O+	CCD	M350	PL	GPS	20:58:58	20:59:56.7	20:59:58.4	21:00:57	0.200	0.200	1.70	14.3

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):

JPL#65 : 3b5930e0-ddb7-11f0-547e-0021dfb9c1d2 [db: observed]

Using prediction 3b5930e0-ddb7-11f0-547e-0021dfb9c1d2 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 = 2262.7, 23.9 km
Circular diameter = 17 km

From 2 chords (CCD,VID)

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 3b5930e0-ddb7-11f0-547e-0021dfb9c1d2 [observed] Occultation Date + Time : 2025-08-12 at 21:06:46 UT +/- 0.01 min [1] Object Designation : (13568) 1992 WL3 Orbit Class : MBA Star Designation : GDR3 4251970417160802944 Star Coordinates (ICRF) : RA = 18 51 25.8660, DE = -08 10 47.041 [2] Star Magnitudes : G = 14.64 mag, RP = 14.03 mag, BP = 15.06 mag Object Magnitude : V = 17.47 mag Estimated Magnitude Drop : 2.9 mag Estimated Max. Duration : 1.5 sec Object Mean Diameter : 12.3 km (src: astorb) Speed of the shadow : 8.4 km/s Elongation to Moon & Sun : 83° (sunlit = 85%), Sun = 140° Cross-track uncertainty : 0.7 mas = 1 km = 0.10 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#65 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 3b5930e0-ddb7-11f0-547e-0021dfb9c1d2 [observed]

 Occultation Date + Time   : 2025-08-12 at 21:06:46 UT +/- 0.01 min  [1]
 Object Designation        : (13568) 1992 WL3
 Orbit Class               : MBA
 Star Designation          : GDR3 4251970417160802944
 Star Coordinates (ICRF)   : RA = 18 51 25.8660, DE = -08 10 47.041  [2]
 Star Magnitudes           : G = 14.64 mag, RP = 14.03 mag, BP = 15.06 mag
 Object Magnitude          : V = 17.47 mag
 Estimated Magnitude Drop  : 2.9 mag
 Estimated Max. Duration   : 1.5 sec
 Object Mean Diameter      : 12.3 km  (src: astorb)
 Speed of the shadow       : 8.4 km/s
 Elongation to Moon & Sun  : 83° (sunlit = 85%), Sun = 140°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#65
 Note                      : FP:true

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

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