Cora»Occultation

2026-08-13 / UCAC4 448-136900 / (476) Hedwig

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	VID	M300	ES	GPS	23:42:06	23:43:00.963	23:43:12.200	23:44:07	0.131	0.131	11.24	118.0
2	show	Deborah Smith	O+	VID	M250	ES	GPS	23:42:10	23:43:06.936	23:43:10.735	23:44:11	0.171	0.171	3.80	39.9

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):

JPL143 : be893a30-d9ad-11f1-43f3-7c586fff6a14 [db: observed]

Using prediction be893a30-d9ad-11f1-43f3-7c586fff6a14 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 = 74.4, -65.7 km
Circular diameter = 137 km

From 2 chords (VID)

You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
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] : be893a30-d9ad-11f1-43f3-7c586fff6a14 [observed] Occultation Date + Time : 2026-08-13 at 23:41:31 UT +/- 0.01 min [1] Object Designation : (476) Hedwig Orbit Class : MBA Star Designation : GDR3 2680876156182142976 Star Coordinates (ICRF) : RA = 21 51 17.9189, DE = -00 26 47.617 [2] Star Magnitudes : G = 13.54 mag, RP = 12.81 mag, BP = 14.14 mag Object Magnitude : V = 12.04 mag Estimated Magnitude Drop : 0.2 mag Estimated Max. Duration : 11.1 sec Object Mean Diameter : 116.8 km (src: astorb) Speed of the shadow : 10.5 km/s Elongation to Moon & Sun : 166° (sunlit = 2%), Sun = 165° Cross-track uncertainty : 2.0 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL143 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : be893a30-d9ad-11f1-43f3-7c586fff6a14 [observed]

 Occultation Date + Time   : 2026-08-13 at 23:41:31 UT +/- 0.01 min  [1]
 Object Designation        : (476) Hedwig
 Orbit Class               : MBA
 Star Designation          : GDR3 2680876156182142976
 Star Coordinates (ICRF)   : RA = 21 51 17.9189, DE = -00 26 47.617  [2]
 Star Magnitudes           : G = 13.54 mag, RP = 12.81 mag, BP = 14.14 mag
 Object Magnitude          : V = 12.04 mag
 Estimated Magnitude Drop  : 0.2 mag
 Estimated Max. Duration   : 11.1 sec
 Object Mean Diameter      : 116.8 km  (src: astorb)
 Speed of the shadow       : 10.5 km/s
 Elongation to Moon & Sun  : 166° (sunlit = 2%), Sun = 165°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL143
 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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