Cora»Occultation

2026-04-15 / UCAC4 603-027309 / (94) Aurora

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Dušan Poizl	O+	VID	M200	SK	NTP	21:11:18	21:12:07.489	21:12:14.607	21:13:18	0.538	0.538	7.12	217.9
2	show	Peter Nosal, Paula Libic	O+	VID	M200	SK	NTP	21:10:35	21:12:05.960	21:12:11.950	21:13:42	0.010	0.010	5.99	183.3

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):

JPL#139 : ea642a90-33bb-11f1-6999-71d6df3a5319 [db: asteroids]

Using prediction ea642a90-33bb-11f1-6999-71d6df3a5319 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 = -363.9, -31.8 km
Circular diameter = 225 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: 2026-04-15, 21:11 UT (JD = 2461146.383)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 302	None	7.226	58°, 16°	2.444116e6	17030.4	0.0°	None	2011-04-20	not scaled	2011-02-19
# 303	None	7.226	242°, 4°	2.444116e6	17030.4	0.0°	None	2011-04-20	not scaled	2011-02-19
# 1830	3.5	7.226	55°, 11°	2.444116e6	17030.4	0.0°	None	2017-06-19	198.0 +/- 4.0 km	2017-06-13
# 1831	3.5	7.226	244°, 0°	2.444116e6	17030.4	0.0°	None	2017-06-19	203.0 +/- 4.0 km	2017-06-13

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] : ea642a90-33bb-11f1-6999-71d6df3a5319 [asteroids] Occultation Date + Time : 2026-04-15 at 21:10:03 UT +/- 0.01 min [1] Object Designation : (94) Aurora Orbit Class : MBA Star Designation : GDR3 3444011855213506944 Star Coordinates (ICRF) : RA = 05 53 54.2138, DE = +30 25 02.624 [2] Star Magnitudes : G = 13.72 mag, RP = 13.19 mag, BP = 14.07 mag Object Magnitude : V = 13.52 mag Estimated Magnitude Drop : 0.7 mag Estimated Max. Duration : 6.7 sec Object Mean Diameter : 204.9 km (src: astorb) Speed of the shadow : 30.6 km/s Elongation to Moon & Sun : 84° (sunlit = 3%), Sun = 63° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.05 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#139 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : ea642a90-33bb-11f1-6999-71d6df3a5319 [asteroids]

 Occultation Date + Time   : 2026-04-15 at 21:10:03 UT +/- 0.01 min  [1]
 Object Designation        : (94) Aurora
 Orbit Class               : MBA
 Star Designation          : GDR3 3444011855213506944
 Star Coordinates (ICRF)   : RA = 05 53 54.2138, DE = +30 25 02.624  [2]
 Star Magnitudes           : G = 13.72 mag, RP = 13.19 mag, BP = 14.07 mag
 Object Magnitude          : V = 13.52 mag
 Estimated Magnitude Drop  : 0.7 mag
 Estimated Max. Duration   : 6.7 sec
 Object Mean Diameter      : 204.9 km  (src: astorb)
 Speed of the shadow       : 30.6 km/s
 Elongation to Moon & Sun  : 84° (sunlit = 3%), Sun = 63°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#139
 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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