Cora»Occultation

2026-05-14 / UCAC4 391-056695 / (36) Atalante

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Antonio Vecchione	O+	VID	M250	IT	GPS	20:00:27	20:00:29.27	20:00:42.79	20:00:48	0.100	0.100	13.52	106.8
2	show	Ernesto Guido, Alfonso Noschese	O+	CCD	T350	IT	GPS	19:59:57	20:01:04.254	20:01:17.971	20:02:54	0.051	0.051	13.72	108.4
3	show	Matthieu Conjat	O+	VID	T400	FR	GPS	20:00:33	20:01:46.28	20:02:01.17	20:03:25	0.100	0.100	14.89	117.6

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#131 : eb7dc2d0-33b9-11f1-6999-5ba5f73f0789 [db: asteroids]

Using prediction eb7dc2d0-33b9-11f1-6999-5ba5f73f0789 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 = 124 x 89 km
a',b' = 62.0, 44.6 km
X0,Y0 = -1437.7, 1.2 km
Mean diameter = 105 km

From 3 chords (CCD,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: 2026-05-14, 20:00 UT (JD = 2461175.333)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 823	None	9.927	190°, -55°	2.44375e6	17425.3	0.0°	None	None	not scaled	2016-01-04
# 824	None	9.927	45°, -49°	2.44375e6	17425.3	0.0°	None	None	not scaled	2016-01-04

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] : eb7dc2d0-33b9-11f1-6999-5ba5f73f0789 [asteroids] Occultation Date + Time : 2026-05-14 at 19:58:06 UT +/- 0.01 min [1] Object Designation : (36) Atalante Orbit Class : MBA Star Designation : GDR3 3577330144044002560 Star Coordinates (ICRF) : RA = 12 15 52.9415, DE = -11 52 32.910 [2] Star Magnitudes : G = 11.97 mag, RP = 11.47 mag, BP = 12.31 mag Object Magnitude : V = 14.1 mag Estimated Magnitude Drop : 2.3 mag Estimated Max. Duration : 13.3 sec Object Mean Diameter : 105.6 km (src: astorb) Speed of the shadow : 7.9 km/s Elongation to Moon & Sun : 162° (sunlit = 6%), Sun = 134° Cross-track uncertainty : 1.7 mas = 3 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.85 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#131 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : eb7dc2d0-33b9-11f1-6999-5ba5f73f0789 [asteroids]

 Occultation Date + Time   : 2026-05-14 at 19:58:06 UT +/- 0.01 min  [1]
 Object Designation        : (36) Atalante
 Orbit Class               : MBA
 Star Designation          : GDR3 3577330144044002560
 Star Coordinates (ICRF)   : RA = 12 15 52.9415, DE = -11 52 32.910  [2]
 Star Magnitudes           : G = 11.97 mag, RP = 11.47 mag, BP = 12.31 mag
 Object Magnitude          : V = 14.1 mag
 Estimated Magnitude Drop  : 2.3 mag
 Estimated Max. Duration   : 13.3 sec
 Object Mean Diameter      : 105.6 km  (src: astorb)
 Speed of the shadow       : 7.9 km/s
 Elongation to Moon & Sun  : 162° (sunlit = 6%), Sun = 134°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.85 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#131
 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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