Cora»Occultation

2026-10-11 / TYC 0041-00123-1 / (30819) 1990 RL2

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Stefano Sposetti	O+	VID	M420	CH	GPS	22:47:21	22:47:54.659	22:47:55.344	22:48:30	0.005	0.005	0.68	6.2
2	show	Björn Kattentidt	O+	VID	T50	DE	GPS	22:46:19	22:47:16.196	22:47:16.759	22:48:19	0.061	0.061	0.56	5.1
3	show	Björn Kattentidt	O+	VID	T50	DE	GPS	22:46:25	22:47:16.172	22:47:16.622	22:48:20	0.058	0.058	0.45	4.1
4	show	Björn Kattentidt	O-	VID	T50	DE	GPS	22:46:28	::	::	22:48:27
5	show	Björn Kattentidt	O-	VID	T50	DE	GPS	22:46:59	::	::	22:48:59

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

5 observations found in db: sodis

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

JPL55 : b7700020-d9b3-11f1-43f3-07212fcfbdc2 [db: observed]

Using prediction b7700020-d9b3-11f1-43f3-07212fcfbdc2 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 = 9 x 4 km
a',b' = 4.5, 1.8 km
X0,Y0 = 2880.5, 37.0 km
Mean diameter = 6 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.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : b7700020-d9b3-11f1-43f3-07212fcfbdc2 [observed] Occultation Date + Time : 2026-10-11 at 22:51:08 UT +/- 0.01 min [1] Object Designation : (30819) 1990 RL2 Orbit Class : MBA Star Designation : GDR3 2514569868519950720 Star Coordinates (ICRF) : RA = 02 10 25.1776, DE = +02 45 25.517 [2] Star Magnitudes : G = 9.67 mag, RP = 9.02 mag, BP = 10.15 mag Object Magnitude : V = 17.01 mag Estimated Magnitude Drop : 7.3 mag Estimated Max. Duration : 0.4 sec Object Mean Diameter : 3.9 km (src: astorb) Speed of the shadow : 9.1 km/s Elongation to Moon & Sun : 165° (sunlit = 2%), Sun = 164° Cross-track uncertainty : 1.0 mas = 0 km = 0.20 path-width (1-sig) RUWE and duplicate source : 1.11 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL55 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : b7700020-d9b3-11f1-43f3-07212fcfbdc2 [observed]

 Occultation Date + Time   : 2026-10-11 at 22:51:08 UT +/- 0.01 min  [1]
 Object Designation        : (30819) 1990 RL2
 Orbit Class               : MBA
 Star Designation          : GDR3 2514569868519950720
 Star Coordinates (ICRF)   : RA = 02 10 25.1776, DE = +02 45 25.517  [2]
 Star Magnitudes           : G = 9.67 mag, RP = 9.02 mag, BP = 10.15 mag
 Object Magnitude          : V = 17.01 mag
 Estimated Magnitude Drop  : 7.3 mag
 Estimated Max. Duration   : 0.4 sec
 Object Mean Diameter      : 3.9 km  (src: astorb)
 Speed of the shadow       : 9.1 km/s
 Elongation to Moon & Sun  : 165° (sunlit = 2%), Sun = 164°
 Cross-track uncertainty   : 1.0 mas = 0 km = 0.20 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL55
 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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