Cora»Occultation

2026-04-19 / UCAC4 568-032297 / (243) Ida

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jiri Kubanek	O+	VID	M200	CZ	GPS	20:29:17	20:30:17.03	20:30:17.35	20:31:17	0.040	0.040	0.32	8.6
2	show	Jiri Kubanek	O+	VID	M200	CZ	GPS	20:29:17	20:30:17.47	20:30:18.35	20:31:17	0.080	0.040	0.88	23.7
3	show	Zdenek Sikac	O+	VID	T150	CZ	GPS	20:29:17	20:30:17.67	20:30:18.39	20:31:17	0.090	0.090	0.72	19.4

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#190 : 1267e720-33c1-11f1-6999-1423ddffd86c [db: asteroids]

Using prediction 1267e720-33c1-11f1-6999-1423ddffd86c 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular 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).
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: 2026-04-19, 20:30 UT (JD = 2461150.354)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 772	None	4.634	259°, -66°	2.444498e6	16652.4	0.0°	None	None	not scaled	2013-10-15
# 773	None	4.634	74°, -61°	2.444498e6	16652.4	0.0°	None	None	not scaled	2013-10-15

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] : 1267e720-33c1-11f1-6999-1423ddffd86c [asteroids] Occultation Date + Time : 2026-04-19 at 20:28:10 UT +/- 0.0 min [1] Object Designation : (243) Ida Orbit Class : MBA Star Designation : GDR3 3379779554149951616 Star Coordinates (ICRF) : RA = 06 42 31.9351, DE = +23 30 30.760 [2] Star Magnitudes : G = 12.72 mag, RP = 12.36 mag, BP = 12.94 mag Object Magnitude : V = 15.61 mag Estimated Magnitude Drop : 3.0 mag Estimated Max. Duration : 1.0 sec Object Mean Diameter : 28.0 km (src: astorb) Speed of the shadow : 26.9 km/s Elongation to Moon & Sun : 37° (sunlit = 8%), Sun = 70° Cross-track uncertainty : 0.3 mas = 0 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.02 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#190 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 1267e720-33c1-11f1-6999-1423ddffd86c [asteroids]

 Occultation Date + Time   : 2026-04-19 at 20:28:10 UT +/- 0.0 min  [1]
 Object Designation        : (243) Ida
 Orbit Class               : MBA
 Star Designation          : GDR3 3379779554149951616
 Star Coordinates (ICRF)   : RA = 06 42 31.9351, DE = +23 30 30.760  [2]
 Star Magnitudes           : G = 12.72 mag, RP = 12.36 mag, BP = 12.94 mag
 Object Magnitude          : V = 15.61 mag
 Estimated Magnitude Drop  : 3.0 mag
 Estimated Max. Duration   : 1.0 sec
 Object Mean Diameter      : 28.0 km  (src: astorb)
 Speed of the shadow       : 26.9 km/s
 Elongation to Moon & Sun  : 37° (sunlit = 8%), Sun = 70°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#190
 Note                      : FP:true

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

More Data and Informations

SiMDA \| 3D Asteroid Catalogue \| Johnston Archive \| Star at CDS (Vizier) \| JPL Small-Body Node \| Minor Planet Center \| Wikipedia

(If error 404: link not valid which means no data available)

Aladin Sky Atlas

Aladin Lite direct link (has Gaia overlay)