Cora»Occultation

2026-07-13 / UCAC4 325-186295 / (1194) Aletta

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Ferran Casarramona	O+	VID	M200	ES	GPS	21:28:02	21:30:17.78	21:30:22.30	21:33:02	0.044	0.044	4.52	55.6
2	show	Deborah Smith	O+	VID	M300	ES	GPS	21:29:22	21:30:20.564	21:30:25.043	21:31:23	0.016	0.016	4.48	55.1
3	show	Deborah Smith	O+	VID	M250	ES	GPS	21:29:25	21:30:22.668	21:30:27.080	21:31:25	0.017	0.017	4.41	54.2

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):

JPL74 : 75e7f6c0-d9aa-11f1-43f3-3a477ffb846e [db: observed]

Using prediction 75e7f6c0-d9aa-11f1-43f3-3a477ffb846e 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 = 58 x 25 km
a',b' = 29.1, 12.5 km
X0,Y0 = -984.0, 23.3 km
Mean diameter = 38 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).
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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 75e7f6c0-d9aa-11f1-43f3-3a477ffb846e [observed] Occultation Date + Time : 2026-07-13 at 21:25:37 UT +/- 0.0 min [1] Object Designation : (1194) Aletta Orbit Class : MBA Star Designation : GDR3 4073461611954143104 Star Coordinates (ICRF) : RA = 18 42 48.9618, DE = -25 09 55.120 [2] Star Magnitudes : G = 11.76 mag, RP = 10.8 mag, BP = 12.72 mag Object Magnitude : V = 14.81 mag Estimated Magnitude Drop : 3.1 mag Estimated Max. Duration : 4.5 sec Object Mean Diameter : 55.4 km (src: astorb) Speed of the shadow : 12.3 km/s Elongation to Moon & Sun : 175° (sunlit = 0%), Sun = 168° Cross-track uncertainty : 0.7 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.85 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL74 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 75e7f6c0-d9aa-11f1-43f3-3a477ffb846e [observed]

 Occultation Date + Time   : 2026-07-13 at 21:25:37 UT +/- 0.0 min  [1]
 Object Designation        : (1194) Aletta
 Orbit Class               : MBA
 Star Designation          : GDR3 4073461611954143104
 Star Coordinates (ICRF)   : RA = 18 42 48.9618, DE = -25 09 55.120  [2]
 Star Magnitudes           : G = 11.76 mag, RP = 10.8 mag, BP = 12.72 mag
 Object Magnitude          : V = 14.81 mag
 Estimated Magnitude Drop  : 3.1 mag
 Estimated Max. Duration   : 4.5 sec
 Object Mean Diameter      : 55.4 km  (src: astorb)
 Speed of the shadow       : 12.3 km/s
 Elongation to Moon & Sun  : 175° (sunlit = 0%), Sun = 168°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.85 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL74
 Note                      : FP:true

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

More Data and Informations

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