Cora»Occultation

2024-11-01 / UCAC4 399-084190 / (4112) Hrabal

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carsten Ziolek	O+	VID	M356	CH	GPS	17:28:48	17:29:17.804	17:29:18.829	17:29:48	0.037	0.037	1.03	33.1
2	show	Stefan Meister	O+	VID	M200	CH	GPS	17:28:47	17:29:15.862	17:29:16.861	17:29:47	0.128	0.128	1.00	32.1
3	show	Andreas Schweizer	O+	VID	M250	CH	GPS	17:28:40	17:29:14.758	17:29:15.879	17:29:46	0.142	0.142	1.12	36.0

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

3 observations found in db: sodis

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

JPL#74 : 96538380-ddb5-11f0-547e-e823bfce9a6d [db: observed]

Using prediction 96538380-ddb5-11f0-547e-e823bfce9a6d 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 36 km

From 3 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] : 96538380-ddb5-11f0-547e-e823bfce9a6d [observed] Occultation Date + Time : 2024-11-01 at 17:28:31 UT +/- 0.0 min [1] Object Designation : (4112) Hrabal Orbit Class : MBA Star Designation : GDR3 4155177659754917760 Star Coordinates (ICRF) : RA = 18 41 25.0312, DE = -10 19 48.260 [2] Star Magnitudes : G = 13.71 mag, RP = 12.63 mag, BP = 14.93 mag Object Magnitude : V = 17.13 mag Estimated Magnitude Drop : 3.5 mag Estimated Max. Duration : 1.5 sec Object Mean Diameter : 48.6 km (src: astorb) Speed of the shadow : 32.1 km/s Elongation to Moon & Sun : 60° (sunlit = 0%), Sun = 61° Cross-track uncertainty : 0.2 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.89 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#74 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 96538380-ddb5-11f0-547e-e823bfce9a6d [observed] Occultation Date + Time : 2024-11-01 at 17:28:31 UT +/- 0.0 min [1] Object Designation : (4112) Hrabal Orbit Class : MBA Star Designation : GDR3 4155177659754917760 Star Coordinates (ICRF) : RA = 18 41 25.0312, DE = -10 19 48.260 [2] Star Magnitudes : G = 13.71 mag, RP = 12.63 mag, BP = 14.93 mag Object Magnitude : V = 17.13 mag Estimated Magnitude Drop : 3.5 mag Estimated Max. Duration : 1.5 sec Object Mean Diameter : 48.6 km (src: astorb) Speed of the shadow : 32.1 km/s Elongation to Moon & Sun : 60° (sunlit = 0%), Sun = 61° Cross-track uncertainty : 0.2 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.89 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#74 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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