Cora»Occultation

2024-12-17 / UCAC4 498-014090 / (51556) 2001 FG171

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carles Schnabel	O+	VID	M400	ES	GPS	22:17:05	22:19:31.00	22:19:31.64	22:21:12	0.08	0.08	0.64	9.3
2	show	Antoni Selva	O+	VID	M500	ES	GPS	22:18:30	22:19:29.780	22:19:30.290	22:20:30	0.06	0.06	0.51	7.4
3	show	Jorge JUAN	O-	VID	M410	ES	GPS	22:17:14			22:21:06

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#57 : c2ab2320-ddb5-11f0-547e-0553f6f740fc [db: observed]

Using prediction c2ab2320-ddb5-11f0-547e-0553f6f740fc 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 = 367.1, 27.1 km
Circular diameter = 10 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] : c2ab2320-ddb5-11f0-547e-0553f6f740fc [observed] Occultation Date + Time : 2024-12-17 at 22:18:01 UT +/- 0.0 min [1] Object Designation : (51556) 2001 FG171 Orbit Class : MBA Star Designation : GDR3 3337914652488911488 Star Coordinates (ICRF) : RA = 05 36 07.6763, DE = +09 33 42.527 [2] Star Magnitudes : G = 13.38 mag, RP = 12.5 mag, BP = 14.19 mag Object Magnitude : V = 18.8 mag Estimated Magnitude Drop : 5.4 mag Estimated Max. Duration : 0.3 sec Object Mean Diameter : 4.2 km (src: astorb) Speed of the shadow : 14.5 km/s Elongation to Moon & Sun : 39° (sunlit = 92%), Sun = 166° Cross-track uncertainty : 0.7 mas = 1 km = 0.24 path-width (1-sig) RUWE and duplicate source : 1.04 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#57 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : c2ab2320-ddb5-11f0-547e-0553f6f740fc [observed] Occultation Date + Time : 2024-12-17 at 22:18:01 UT +/- 0.0 min [1] Object Designation : (51556) 2001 FG171 Orbit Class : MBA Star Designation : GDR3 3337914652488911488 Star Coordinates (ICRF) : RA = 05 36 07.6763, DE = +09 33 42.527 [2] Star Magnitudes : G = 13.38 mag, RP = 12.5 mag, BP = 14.19 mag Object Magnitude : V = 18.8 mag Estimated Magnitude Drop : 5.4 mag Estimated Max. Duration : 0.3 sec Object Mean Diameter : 4.2 km (src: astorb) Speed of the shadow : 14.5 km/s Elongation to Moon & Sun : 39° (sunlit = 92%), Sun = 166° Cross-track uncertainty : 0.7 mas = 1 km = 0.24 path-width (1-sig) RUWE and duplicate source : 1.04 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#57 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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