Cora»Occultation

2023-10-08 / HIP 769 / (1340) Yvette

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Christophe Cote	O+	VID	M200	FR	NTP	20:26:08	20:31:52.7	20:31:55.2	20:36:04	0.5	0.5	2.50	35.2
2	show	Pierre Le Cam	O+	VID	M500	FR	GPS	20:31:25	20:31:50.897	20:31:52.861	20:32:25	0.015	0.015	1.96	27.6
3	show	Jean-Louis Dumont	O+	VID	M400	FR	GPS	20:30:00	20:31:49.07	20:31:51.43	20:34:00	0.02	0.02	2.36	33.3
4	show	Lionel Rousselot	O+	VID	L80	FR	GPS	20:30:01	20:31:43.22	20:31:45.76	20:34:02	0.02	0.02	2.54	35.8
5	show	Stefano Sposetti	O-	VID	M420	CH	GPS	20:29:00			20:34:00
6	show	Arnaud Leroy	O-	VID	M250	FR	GPS	20:30:08			20:33:07

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

6 observations found in db: sodis

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

JPL#74 : 26e46740-ddb4-11f0-547e-b6a816dfd4cb [db: observed]

Using prediction 26e46740-ddb4-11f0-547e-b6a816dfd4cb 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:
Size = 217 x 18 km
a',b' = 108.5, 9.0 km
X0,Y0 = 2091.5, 35.5 km
Mean diameter = 62 km

From 4 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).

Check SiMDA for size and mass data.

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 26e46740-ddb4-11f0-547e-b6a816dfd4cb [observed] Occultation Date + Time : 2023-10-08 at 20:31:07 UT +/- 0.0 min [1] Object Designation : (1340) Yvette Orbit Class : MBA Star Designation : GDR3 2546561151467110784 Star Coordinates (ICRF) : RA = 00 09 28.0835, DE = +01 14 38.670 [2] Star Magnitudes : G = 6.93 mag, RP = 6.19 mag, BP = 7.52 mag Object Magnitude : V = 16.32 mag Estimated Magnitude Drop : 9.4 mag Estimated Max. Duration : 1.8 sec Object Mean Diameter : 25.9 km (src: astorb) Speed of the shadow : 14.1 km/s Elongation to Moon & Sun : 128° (sunlit = 29%), Sun = 167° Cross-track uncertainty : 0.4 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.88 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] : 26e46740-ddb4-11f0-547e-b6a816dfd4cb [observed]

 Occultation Date + Time   : 2023-10-08 at 20:31:07 UT +/- 0.0 min  [1]
 Object Designation        : (1340) Yvette
 Orbit Class               : MBA
 Star Designation          : GDR3 2546561151467110784
 Star Coordinates (ICRF)   : RA = 00 09 28.0835, DE = +01 14 38.670  [2]
 Star Magnitudes           : G = 6.93 mag, RP = 6.19 mag, BP = 7.52 mag
 Object Magnitude          : V = 16.32 mag
 Estimated Magnitude Drop  : 9.4 mag
 Estimated Max. Duration   : 1.8 sec
 Object Mean Diameter      : 25.9 km  (src: astorb)
 Speed of the shadow       : 14.1 km/s
 Elongation to Moon & Sun  : 128° (sunlit = 29%), Sun = 167°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.88 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

More Data and Informations

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