Cora»Occultation

2023-12-18 / UCAC4 595-043336 / (1613) Smiley

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jiri Polak	O+	VID	M300	CZ	GPS	00:42:10	00:44:14.66	00:44:16.26	00:46:10	0.05	0.05	1.60	5.8
2	show	Jiri Kubanek	O+	VID	M303	CZ	GPS	00:42:27	00:44:06.55	00:44:08.47	00:45:27	0.06	0.06	1.92	6.9
3	show	Michal Rottenborn	O-	VID	M254	CZ	GPS	00:42:03			00:46:03

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#63 : 491d63c0-ddb4-11f0-547e-eb567e3c07b7 [db: observed]

Using prediction 491d63c0-ddb4-11f0-547e-eb567e3c07b7 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 = 156.1, 32.9 km
Circular diameter = 12 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] : 491d63c0-ddb4-11f0-547e-eb567e3c07b7 [observed] Occultation Date + Time : 2023-12-18 at 00:40:54 UT +/- 0.01 min [1] Object Designation : (1613) Smiley Orbit Class : MBA Star Designation : GDR3 0684376345397677824 Star Coordinates (ICRF) : RA = 08 12 09.8922, DE = +28 48 15.122 [2] Star Magnitudes : G = 13.54 mag, RP = 13.12 mag, BP = 13.8 mag Object Magnitude : V = 14.43 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 5.9 sec Object Mean Diameter : 21.2 km (src: astorb) Speed of the shadow : 3.6 km/s Elongation to Moon & Sun : 146° (sunlit = 30%), Sun = 146° Cross-track uncertainty : 0.7 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.95 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 491d63c0-ddb4-11f0-547e-eb567e3c07b7 [observed] Occultation Date + Time : 2023-12-18 at 00:40:54 UT +/- 0.01 min [1] Object Designation : (1613) Smiley Orbit Class : MBA Star Designation : GDR3 0684376345397677824 Star Coordinates (ICRF) : RA = 08 12 09.8922, DE = +28 48 15.122 [2] Star Magnitudes : G = 13.54 mag, RP = 13.12 mag, BP = 13.8 mag Object Magnitude : V = 14.43 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 5.9 sec Object Mean Diameter : 21.2 km (src: astorb) Speed of the shadow : 3.6 km/s Elongation to Moon & Sun : 146° (sunlit = 30%), Sun = 146° Cross-track uncertainty : 0.7 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.95 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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