Cora»Occultation

2026-03-20 / UCAC4 550-048609 / (380) Fiducia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Carles Schnabel	O+	VID	M400	ES	GPS	00:09:49	00:11:48.67	00:11:55.49	00:13:51	0.060	0.060	6.82	65.5
2	show	Jorge JUAN, Carles Schnabel	O+	VID	M410	ES	GPS	00:08:07	00:11:49.69	00:11:56.41	00:15:04	0.080	0.160	6.72	64.5
3	show	Antoni Selva, Antonio Capape	O+	VID	M500	ES	GPS	00:10:53	00:11:47.01	00:11:54.38	00:12:53	0.040	0.040	7.37	70.8
4	show	Joan Rovira	O+	VID	M250	ES	GPS	00:09:20	00:11:47.78	00:11:55.46	00:15:30	0.080	0.080	7.68	73.7

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#78 : 9bd22480-de6c-11f0-4858-8704ec9f8cda [db: asteroids]

Using prediction 9bd22480-de6c-11f0-4858-8704ec9f8cda 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 = 131 x 72 km
a',b' = 65.6, 35.8 km
X0,Y0 = -864.2, 19.3 km
Mean diameter = 97 km

From 4 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: 2026-03-20, 00:11 UT (JD = 2461119.508)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3086	3.0	13.717	202°, 44°	2.454499e6	6620.5	0.0°	None	2019-06-25	72.0 +/- 7.0 km	2019-06-24
# 3087	3.0	13.717	21°, 34°	2.454499e6	6620.5	0.0°	None	2019-06-25	73.0 +/- 7.0 km	2019-06-24

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] : 9bd22480-de6c-11f0-4858-8704ec9f8cda [asteroids] Occultation Date + Time : 2026-03-20 at 00:14:45 UT +/- 0.01 min [1] Object Designation : (380) Fiducia Orbit Class : MBA Star Designation : GDR3 0628340319402497920 Star Coordinates (ICRF) : RA = 10 05 27.0642, DE = +19 58 56.504 [2] Star Magnitudes : G = 13.64 mag, RP = 13.14 mag, BP = 13.97 mag Object Magnitude : V = 14.29 mag Estimated Magnitude Drop : 1.1 mag Estimated Max. Duration : 7.6 sec Object Mean Diameter : 73.2 km (src: astorb) Speed of the shadow : 9.6 km/s Elongation to Moon & Sun : 133° (sunlit = 1%), Sun = 146° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#78 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 9bd22480-de6c-11f0-4858-8704ec9f8cda [asteroids]

 Occultation Date + Time   : 2026-03-20 at 00:14:45 UT +/- 0.01 min  [1]
 Object Designation        : (380) Fiducia
 Orbit Class               : MBA
 Star Designation          : GDR3 0628340319402497920
 Star Coordinates (ICRF)   : RA = 10 05 27.0642, DE = +19 58 56.504  [2]
 Star Magnitudes           : G = 13.64 mag, RP = 13.14 mag, BP = 13.97 mag
 Object Magnitude          : V = 14.29 mag
 Estimated Magnitude Drop  : 1.1 mag
 Estimated Max. Duration   : 7.6 sec
 Object Mean Diameter      : 73.2 km  (src: astorb)
 Speed of the shadow       : 9.6 km/s
 Elongation to Moon & Sun  : 133° (sunlit = 1%), Sun = 146°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78
 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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