Cora»Occultation

2025-12-10 / UCAC4 689-022814 / (1005) Arago

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michael OConnell	O+	VID	M350	ES	NTP	19:48:10	19:49:07.43	19:49:12.84	19:50:10	0.140	0.140	5.41	56.8
2	show	Faustino Garcia	O+	CCD	T250	ES	GPS	19:47:57	19:48:55.6	19:48:57.1	19:49:57	0.400	0.400	1.50	15.8
3	show	Manuel Alfonso Coya Lozano, Juan Collada	O+	CCD	M356	ES	GPS	19:47:57	19:48:52.1	19:48:57.00	19:49:57	0.300	0.300	4.90	51.5

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#80 : d702eee0-ddb8-11f0-547e-12111ffdf5e7 [db: observed]

Using prediction d702eee0-ddb8-11f0-547e-12111ffdf5e7 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 = 71 x 56 km
a',b' = 35.3, 27.8 km
X0,Y0 = 795.2, 20.8 km
Mean diameter = 63 km

From 3 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).

Check SiMDA for size and mass data.

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : d702eee0-ddb8-11f0-547e-12111ffdf5e7 [observed] Occultation Date + Time : 2025-12-10 at 19:44:53 UT +/- 0.01 min [1] Object Designation : (1005) Arago Orbit Class : MBA Star Designation : GDR3 0249128895111526016 Star Coordinates (ICRF) : RA = 03 27 20.9302, DE = +47 46 03.977 [2] Star Magnitudes : G = 14.68 mag, RP = 13.73 mag, BP = 15.6 mag Object Magnitude : V = 14.43 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 5.5 sec Object Mean Diameter : 57.8 km (src: astorb) Speed of the shadow : 10.5 km/s Elongation to Moon & Sun : 94° (sunlit = 61%), Sun = 148° Cross-track uncertainty : 1.3 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#80 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : d702eee0-ddb8-11f0-547e-12111ffdf5e7 [observed] Occultation Date + Time : 2025-12-10 at 19:44:53 UT +/- 0.01 min [1] Object Designation : (1005) Arago Orbit Class : MBA Star Designation : GDR3 0249128895111526016 Star Coordinates (ICRF) : RA = 03 27 20.9302, DE = +47 46 03.977 [2] Star Magnitudes : G = 14.68 mag, RP = 13.73 mag, BP = 15.6 mag Object Magnitude : V = 14.43 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 5.5 sec Object Mean Diameter : 57.8 km (src: astorb) Speed of the shadow : 10.5 km/s Elongation to Moon & Sun : 94° (sunlit = 61%), Sun = 148° Cross-track uncertainty : 1.3 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#80 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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