Cora»Occultation

2024-12-31 / UCAC4 453-000016 / (137) Meliboea

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Alberto Ossola	O+	VID	M230	CH	GPS	18:10:13	18:11:49.65	18:11:55.41	18:13:00	0.32	0.32	5.76	136.5
2	show	Andrea Manna	O+	VID	M200	CH	GPS	18:09:05	18:11:49.84	18:11:54.68	18:14:53	0.08	0.12	4.84	114.7
3	show	Stefano Sposetti	O+	VID	M420	CH	GPS	18:09:00	18:11:50.205	18:11:54.912	18:15:00	0.051	0.051	4.71	111.6

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#145 : e525e390-ddb5-11f0-547e-6c88a5bf501a [db: observed]

Using prediction e525e390-ddb5-11f0-547e-6c88a5bf501a 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 155 km

From 3 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] : e525e390-ddb5-11f0-547e-6c88a5bf501a [observed] Occultation Date + Time : 2024-12-31 at 18:10:00 UT +/- 0.0 min [1] Object Designation : (137) Meliboea Orbit Class : MBA Star Designation : GDR3 2738218195832102016 Star Coordinates (ICRF) : RA = 00 00 29.0028, DE = +00 27 33.608 [2] Star Magnitudes : G = 13.25 mag, RP = 12.59 mag, BP = 13.76 mag Object Magnitude : V = 13.84 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 6.1 sec Object Mean Diameter : 145.4 km (src: astorb) Speed of the shadow : 23.7 km/s Elongation to Moon & Sun : 70° (sunlit = 1%), Sun = 80° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#145 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : e525e390-ddb5-11f0-547e-6c88a5bf501a [observed] Occultation Date + Time : 2024-12-31 at 18:10:00 UT +/- 0.0 min [1] Object Designation : (137) Meliboea Orbit Class : MBA Star Designation : GDR3 2738218195832102016 Star Coordinates (ICRF) : RA = 00 00 29.0028, DE = +00 27 33.608 [2] Star Magnitudes : G = 13.25 mag, RP = 12.59 mag, BP = 13.76 mag Object Magnitude : V = 13.84 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 6.1 sec Object Mean Diameter : 145.4 km (src: astorb) Speed of the shadow : 23.7 km/s Elongation to Moon & Sun : 70° (sunlit = 1%), Sun = 80° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#145 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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