Cora»Occultation

2026-08-07 / UCAC4 418-138596 / (313) Chaldaea

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith, Eric Smith	O+	VID	M280	FR	GPS	00:01:52	00:02:51.732	00:02:56.082	00:03:53	0.097	0.097	4.35	55.2
2	show	Oliver Kloes	O+	CCD	M254	DE	GPS	00:00:02	00:02:11.9	00:02:19.4	00:04:01	0.500	0.500	7.50	95.2

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

2 observations found in db: sodis

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

JPL130 : 50d3fa60-d995-11f1-43f3-f4b2b7af7fa9 [db: observed]

JPL130 : 1cce8730-d9ae-11f1-43f3-4308bd7d3fd3 [db: observed]

Using prediction 1cce8730-d9ae-11f1-43f3-4308bd7d3fd3 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 = 1736.1, 22.9 km
Circular diameter = 97 km

From 2 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: 2026-08-07, 00:02 UT (JD = 2461259.501)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 1223	None	8.390	218°, 29°	2.443125e6	18134.5	0.0°	None	None	not scaled	2016-01-04
# 1224	None	8.390	44°, 11°	2.443125e6	18134.5	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] : 1cce8730-d9ae-11f1-43f3-4308bd7d3fd3 [observed] Occultation Date + Time : 2026-08-07 at 00:07:32 UT +/- 0.01 min [1] Object Designation : (313) Chaldaea Orbit Class : MBA Star Designation : GDR3 4196891241064240128 Star Coordinates (ICRF) : RA = 19 51 21.5652, DE = -06 27 47.714 [2] Star Magnitudes : G = 14.13 mag, RP = 13.3 mag, BP = 14.85 mag Object Magnitude : V = 13.26 mag Estimated Magnitude Drop : 0.4 mag Estimated Max. Duration : 7.6 sec Object Mean Diameter : 96.3 km (src: astorb) Speed of the shadow : 12.7 km/s Elongation to Moon & Sun : 115° (sunlit = 40%), Sun = 159° Cross-track uncertainty : 0.7 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL130 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 1cce8730-d9ae-11f1-43f3-4308bd7d3fd3 [observed]

 Occultation Date + Time   : 2026-08-07 at 00:07:32 UT +/- 0.01 min  [1]
 Object Designation        : (313) Chaldaea
 Orbit Class               : MBA
 Star Designation          : GDR3 4196891241064240128
 Star Coordinates (ICRF)   : RA = 19 51 21.5652, DE = -06 27 47.714  [2]
 Star Magnitudes           : G = 14.13 mag, RP = 13.3 mag, BP = 14.85 mag
 Object Magnitude          : V = 13.26 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 7.6 sec
 Object Mean Diameter      : 96.3 km  (src: astorb)
 Speed of the shadow       : 12.7 km/s
 Elongation to Moon & Sun  : 115° (sunlit = 40%), Sun = 159°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL130
 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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