Cora»Occultation

2025-11-04 / UCAC4 525-034042 / (266) Aline

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Andrea Manna	O+	VID	M200	CH	GPS	03:24:23	03:27:47.90	03:27:58.78	03:31:05	0.160	0.160	10.88	76.2
2	show	Stefano Sposetti	O+	VID	M420	CH	GPS	03:26:00	03:27:48.21	03:27:57.46	03:30:00	0.020	0.020	9.25	64.8
3	show	Karl-Ludwig Bath	O+	VID	T180	DE	GPS	03:25:25	03:27:17.27	03:27:30.74	03:29:26	0.050	0.130	13.47	94.3

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

3 observations found in db: sodis

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

JPL#145 : b01718b0-ddb8-11f0-547e-7fbaa8fb13f0 [db: observed]

Using prediction b01718b0-ddb8-11f0-547e-7fbaa8fb13f0 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 = 135 x 92 km
a',b' = 67.5, 45.9 km
X0,Y0 = -849.5, 19.5 km
Mean diameter = 111 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).

Check SiMDA for size and mass data.

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : b01718b0-ddb8-11f0-547e-7fbaa8fb13f0 [observed] Occultation Date + Time : 2025-11-04 at 03:35:26 UT +/- 0.07 min [1] Object Designation : (266) Aline Orbit Class : MBA Star Designation : GDR3 3354554077350419456 Star Coordinates (ICRF) : RA = 06 48 49.2366, DE = +14 56 44.551 [2] Star Magnitudes : G = 13.46 mag, RP = 13.02 mag, BP = 13.74 mag Object Magnitude : V = 13.08 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 15.5 sec Object Mean Diameter : 109.1 km (src: astorb) Speed of the shadow : 7.0 km/s Elongation to Moon & Sun : 80° (sunlit = 97%), Sun = 120° Cross-track uncertainty : 1.3 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.0 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] : b01718b0-ddb8-11f0-547e-7fbaa8fb13f0 [observed]

 Occultation Date + Time   : 2025-11-04 at 03:35:26 UT +/- 0.07 min  [1]
 Object Designation        : (266) Aline
 Orbit Class               : MBA
 Star Designation          : GDR3 3354554077350419456
 Star Coordinates (ICRF)   : RA = 06 48 49.2366, DE = +14 56 44.551  [2]
 Star Magnitudes           : G = 13.46 mag, RP = 13.02 mag, BP = 13.74 mag
 Object Magnitude          : V = 13.08 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 15.5 sec
 Object Mean Diameter      : 109.1 km  (src: astorb)
 Speed of the shadow       : 7.0 km/s
 Elongation to Moon & Sun  : 80° (sunlit = 97%), Sun = 120°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.0 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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