Cora»Occultation

2022-12-04 / UCAC4 411-133446 / (420) Bertholda

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Yves Argentin	O+	VID	M3050	FR	GPS	18:19:47	18:20:27.57	18:20:32.21	18:21:14	0.16	0.16	4.64	118.3
2	show	Gerard VAUDESCAL	O+	VID	T250	FR	GPS	18:19:33	18:20:27.3	18:20:32.2	18:21:29	0.2	0.2	4.90	125.0

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

2 observations found in db: sodis

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

JPL#144 : 3c185f00-ddb3-11f0-547e-e49a7a7ccefe [db: observed]

Using prediction 3c185f00-ddb3-11f0-547e-e49a7a7ccefe 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 = 981.1, 120.6 km
Circular diameter = 318 km

From 2 chords (VID)

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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] : 3c185f00-ddb3-11f0-547e-e49a7a7ccefe [observed] Occultation Date + Time : 2022-12-04 at 18:18:31 UT +/- 0.0 min [1] Object Designation : (420) Bertholda Orbit Class : MBA Star Designation : GDR3 6894949766091524480 Star Coordinates (ICRF) : RA = 21 33 02.2017, DE = -07 53 51.502 [2] Star Magnitudes : G = 13.73 mag, RP = 12.93 mag, BP = 14.42 mag Object Magnitude : V = 14.71 mag Estimated Magnitude Drop : 1.4 mag Estimated Max. Duration : 5.5 sec Object Mean Diameter : 141.2 km (src: astorb) Speed of the shadow : 25.5 km/s Elongation to Moon & Sun : 71° (sunlit = 89%), Sun = 71° Cross-track uncertainty : 1.0 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#144 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 3c185f00-ddb3-11f0-547e-e49a7a7ccefe [observed]

 Occultation Date + Time   : 2022-12-04 at 18:18:31 UT +/- 0.0 min  [1]
 Object Designation        : (420) Bertholda
 Orbit Class               : MBA
 Star Designation          : GDR3 6894949766091524480
 Star Coordinates (ICRF)   : RA = 21 33 02.2017, DE = -07 53 51.502  [2]
 Star Magnitudes           : G = 13.73 mag, RP = 12.93 mag, BP = 14.42 mag
 Object Magnitude          : V = 14.71 mag
 Estimated Magnitude Drop  : 1.4 mag
 Estimated Max. Duration   : 5.5 sec
 Object Mean Diameter      : 141.2 km  (src: astorb)
 Speed of the shadow       : 25.5 km/s
 Elongation to Moon & Sun  : 71° (sunlit = 89%), Sun = 71°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#144
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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