Cora»Occultation

2024-09-17 / UCAC4 556-029809 / (420) Bertholda

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carles Schnabel	O+	VID	M400	ES	GPS	04:50:34	04:52:46.9	04:52:50.1	04:53:12	0.6	1.3	3.20	70.4
2	show	Oscar Canales	O+	CCD	M280	ES	GPS	04:50:38	04:52:37.59	04:52:39.74	04:54:38	0.27	0.27	2.15	47.3

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 : 74da5490-ddb5-11f0-547e-d937faefd9db [db: observed]

Using prediction 74da5490-ddb5-11f0-547e-d937faefd9db 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 = -402.1, 58.5 km
Circular diameter = 74 km

From 2 chords (VID,CCD)

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] : 74da5490-ddb5-11f0-547e-d937faefd9db [observed] Occultation Date + Time : 2024-09-17 at 04:54:44 UT +/- 0.01 min [1] Object Designation : (420) Bertholda Orbit Class : MBA Star Designation : GDR3 3373037486288078208 Star Coordinates (ICRF) : RA = 06 31 43.3751, DE = +21 11 37.598 [2] Star Magnitudes : G = 14.94 mag, RP = 14.11 mag, BP = 15.65 mag Object Magnitude : V = 14.52 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 6.4 sec Object Mean Diameter : 141.2 km (src: astorb) Speed of the shadow : 22.0 km/s Elongation to Moon & Sun : 115° (sunlit = 99%), Sun = 77° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.93 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] : 74da5490-ddb5-11f0-547e-d937faefd9db [observed] Occultation Date + Time : 2024-09-17 at 04:54:44 UT +/- 0.01 min [1] Object Designation : (420) Bertholda Orbit Class : MBA Star Designation : GDR3 3373037486288078208 Star Coordinates (ICRF) : RA = 06 31 43.3751, DE = +21 11 37.598 [2] Star Magnitudes : G = 14.94 mag, RP = 14.11 mag, BP = 15.65 mag Object Magnitude : V = 14.52 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 6.4 sec Object Mean Diameter : 141.2 km (src: astorb) Speed of the shadow : 22.0 km/s Elongation to Moon & Sun : 115° (sunlit = 99%), Sun = 77° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.93 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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