Cora»Occultation

2026-08-31 / UCAC4 571-001244 / (1000) Piazzia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Florian Signoret	O+	VID	T200	FR	GPS	21:44:32	21:46:42.238	21:46:45.363	21:48:18	0.029	0.029	3.12	39.9
2	show	Matthieu Conjat	O+	VID	T400	FR	GPS	21:45:39	21:46:41.07	21:46:44.08	21:47:33	0.012	0.012	3.01	38.5

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

2 observations found in db: sodis

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

JPL79 : 09209330-d9af-11f1-43f3-e51e2cf7400d [db: observed]

Using prediction 09209330-d9af-11f1-43f3-e51e2cf7400d 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 = -488.3, 39.6 km
Circular diameter = 41 km

From 2 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.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2026-08-31, 21:45 UT (JD = 2461284.406)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3529	1.0	9.477	131°, -54°	2.451051e6	10233.4	0.0°	None	2019-09-26	not scaled	2019-05-07

Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 09209330-d9af-11f1-43f3-e51e2cf7400d [observed] Occultation Date + Time : 2026-08-31 at 21:40:56 UT +/- 0.01 min [1] Object Designation : (1000) Piazzia Orbit Class : MBA Star Designation : GDR3 2806275766567588096 Star Coordinates (ICRF) : RA = 00 33 34.0951, DE = +24 09 08.547 [2] Star Magnitudes : G = 11.02 mag, RP = 10.65 mag, BP = 11.25 mag Object Magnitude : V = 16.16 mag Estimated Magnitude Drop : 5.2 mag Estimated Max. Duration : 3.7 sec Object Mean Diameter : 47.7 km (src: astorb) Speed of the shadow : 12.8 km/s Elongation to Moon & Sun : 16° (sunlit = 85%), Sun = 137° Cross-track uncertainty : 2.3 mas = 4 km = 0.09 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL79 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 09209330-d9af-11f1-43f3-e51e2cf7400d [observed]

 Occultation Date + Time   : 2026-08-31 at 21:40:56 UT +/- 0.01 min  [1]
 Object Designation        : (1000) Piazzia
 Orbit Class               : MBA
 Star Designation          : GDR3 2806275766567588096
 Star Coordinates (ICRF)   : RA = 00 33 34.0951, DE = +24 09 08.547  [2]
 Star Magnitudes           : G = 11.02 mag, RP = 10.65 mag, BP = 11.25 mag
 Object Magnitude          : V = 16.16 mag
 Estimated Magnitude Drop  : 5.2 mag
 Estimated Max. Duration   : 3.7 sec
 Object Mean Diameter      : 47.7 km  (src: astorb)
 Speed of the shadow       : 12.8 km/s
 Elongation to Moon & Sun  : 16° (sunlit = 85%), Sun = 137°
 Cross-track uncertainty   : 2.3 mas = 4 km = 0.09 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL79
 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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