Cora»Occultation

2025-04-03 / UCAC4 560-011190 / (380) Fiducia

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Martin Gutekunst	O+	VID	L280	DE	GPS	18:50:50	18:51:50.610	18:51:53.160	18:52:51	0.087	0.087	2.55	81.9
2	show	Gregor Krannich	O+	VID	M350	DE	GPS	18:50:50	18:51:50.667	18:51:51.967	18:52:50	0.108	0.108	1.30	41.7

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

2 observations found in db: sodis

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

JPL#78 : 5f978fc0-ddb6-11f0-547e-7294bbf78611 [db: observed]

Using prediction 5f978fc0-ddb6-11f0-547e-7294bbf78611 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 = 522.4, 13.4 km
Circular diameter = 88 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: 2025-04-03, 18:51 UT (JD = 2460769.285)

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	6270.3	0.0°	None	2019-06-25	72.0 +/- 7.0 km	2019-06-24
# 3087	3.0	13.717	21°, 34°	2.454499e6	6270.3	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] : 5f978fc0-ddb6-11f0-547e-7294bbf78611 [observed] Occultation Date + Time : 2025-04-03 at 18:49:43 UT +/- 0.0 min [1] Object Designation : (380) Fiducia Orbit Class : MBA Star Designation : GDR3 3412929383048349440 Star Coordinates (ICRF) : RA = 04 46 02.1643, DE = +21 57 08.239 [2] Star Magnitudes : G = 14.45 mag, RP = 13.75 mag, BP = 14.97 mag Object Magnitude : V = 15.27 mag Estimated Magnitude Drop : 1.2 mag Estimated Max. Duration : 2.3 sec Object Mean Diameter : 73.2 km (src: astorb) Speed of the shadow : 32.1 km/s Elongation to Moon & Sun : 16° (sunlit = 36%), Sun = 59° Cross-track uncertainty : 0.7 mas = 1 km = 0.02 path-width (1-sig) RUWE and duplicate source : 1.02 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] : 5f978fc0-ddb6-11f0-547e-7294bbf78611 [observed]

 Occultation Date + Time   : 2025-04-03 at 18:49:43 UT +/- 0.0 min  [1]
 Object Designation        : (380) Fiducia
 Orbit Class               : MBA
 Star Designation          : GDR3 3412929383048349440
 Star Coordinates (ICRF)   : RA = 04 46 02.1643, DE = +21 57 08.239  [2]
 Star Magnitudes           : G = 14.45 mag, RP = 13.75 mag, BP = 14.97 mag
 Object Magnitude          : V = 15.27 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 2.3 sec
 Object Mean Diameter      : 73.2 km  (src: astorb)
 Speed of the shadow       : 32.1 km/s
 Elongation to Moon & Sun  : 16° (sunlit = 36%), Sun = 59°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.02 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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