Cora»Occultation

2026-04-09 / UCAC4 547-018186 / (45) Eugenia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Alberto Ossola	O+	VID	M230	CH	GPS	19:44:08	19:45:54.54	19:46:02.22	19:47:18	0.400	0.240	7.68	211.2
2	show	Andrea Manna, Simone Manna	O+	VID	M200	CH	GPS	19:43:09	19:45:54.4	19:46:01.5	19:49:57	0.300	0.300	7.10	195.2
3	show	Stefano Sposetti	O+	VID	M280	CH	GPS	19:44:55	19:45:54.531	19:46:01.330	19:46:55	0.187	0.187	6.80	187.0
4	show	Andreas Schweizer	O-	VID	M250	CH	GPS	19:45:24	::	::	19:46:24

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

4 observations found in db: sodis

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

JPL#149 : 537caf90-33ba-11f1-6999-ba9827c7ad6e [db: asteroids]

Using prediction 537caf90-33ba-11f1-6999-ba9827c7ad6e 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 = 213 x 132 km
a',b' = 106.4, 66.2 km
X0,Y0 = 404.1, 19.7 km
Mean diameter = 168 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: 2026-04-09, 19:45 UT (JD = 2461140.323)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 134	None	5.699	124°, -33°	2.440381e6	20759.3	0.0°	None	2013-09-06	172.0 +/- 16.0 km	2013-09-03
# 1812	4.0	5.699	127°, -35°	2.440381e6	20759.3	0.0°	None	2017-06-19	188.0 +/- 4.0 km	2017-06-07

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] : 537caf90-33ba-11f1-6999-ba9827c7ad6e [asteroids] Occultation Date + Time : 2026-04-09 at 19:43:25 UT +/- 0.0 min [1] Object Designation : (45) Eugenia Orbit Class : MBA Star Designation : GDR3 3399225104481559296 Star Coordinates (ICRF) : RA = 05 43 03.5352, DE = +19 14 45.249 [2] Star Magnitudes : G = 13.81 mag, RP = 13.26 mag, BP = 14.18 mag Object Magnitude : V = 13.55 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 7.8 sec Object Mean Diameter : 214.6 km (src: astorb) Speed of the shadow : 27.5 km/s Elongation to Moon & Sun : 159° (sunlit = 54%), Sun = 66° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#149 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 537caf90-33ba-11f1-6999-ba9827c7ad6e [asteroids]

 Occultation Date + Time   : 2026-04-09 at 19:43:25 UT +/- 0.0 min  [1]
 Object Designation        : (45) Eugenia
 Orbit Class               : MBA
 Star Designation          : GDR3 3399225104481559296
 Star Coordinates (ICRF)   : RA = 05 43 03.5352, DE = +19 14 45.249  [2]
 Star Magnitudes           : G = 13.81 mag, RP = 13.26 mag, BP = 14.18 mag
 Object Magnitude          : V = 13.55 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 7.8 sec
 Object Mean Diameter      : 214.6 km  (src: astorb)
 Speed of the shadow       : 27.5 km/s
 Elongation to Moon & Sun  : 159° (sunlit = 54%), Sun = 66°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#149
 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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