Cora»Occultation

2025-10-09 / Other J221908.63+042826.7 / (1892) Lucienne

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Jean-Louis Dumont	O+	VID	M400	FR	GPS	21:36:07	21:37:45.03	21:37:46.38	21:39:07	0.020	0.030	1.35	6.3
2	show	Michal Rottenborn	O+	VID	M254	CZ	GPS	21:33:53	21:34:52.506	21:34:54.871	21:35:53	0.010	0.015	2.37	11.1
3	show	Jiri Kubanek	O+	VID	M200	CZ	GPS	21:33:45	21:34:44.124	21:34:46.390	21:35:45	0.018	0.018	2.27	10.7

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

3 observations found in db: sodis

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

JPL#63 : 8c6b2b40-ddb8-11f0-547e-bff7af3fee33 [db: observed]

Using prediction 8c6b2b40-ddb8-11f0-547e-bff7af3fee33 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 = 146 x 4 km
a',b' = 73.0, 2.0 km
X0,Y0 = 1004.8, 29.7 km
Mean diameter = 24 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: 2025-10-09, 21:37 UT (JD = 2460958.401)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 1045	None	9.316	213°, -61°	2.445698e6	15260.4	0.0°	None	None	not scaled	2016-01-04
# 1046	None	9.316	26°, -40°	2.445698e6	15260.4	0.0°	None	None	not scaled	2016-01-04

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] : 8c6b2b40-ddb8-11f0-547e-bff7af3fee33 [observed] Occultation Date + Time : 2025-10-09 at 21:43:45 UT +/- 0.01 min [1] Object Designation : (1892) Lucienne Orbit Class : MBA Star Designation : GDR3 2707205229123865472 Star Coordinates (ICRF) : RA = 22 19 08.6258, DE = +04 28 26.526 [2] Star Magnitudes : G = 10.87 mag, RP = 10.4 mag, BP = 11.18 mag Object Magnitude : V = 15.44 mag Estimated Magnitude Drop : 4.6 mag Estimated Max. Duration : 3.0 sec Object Mean Diameter : 14.2 km (src: astorb) Speed of the shadow : 4.7 km/s Elongation to Moon & Sun : 76° (sunlit = 89%), Sun = 139° Cross-track uncertainty : 1.0 mas = 1 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.93 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 8c6b2b40-ddb8-11f0-547e-bff7af3fee33 [observed]

 Occultation Date + Time   : 2025-10-09 at 21:43:45 UT +/- 0.01 min  [1]
 Object Designation        : (1892) Lucienne
 Orbit Class               : MBA
 Star Designation          : GDR3 2707205229123865472
 Star Coordinates (ICRF)   : RA = 22 19 08.6258, DE = +04 28 26.526  [2]
 Star Magnitudes           : G = 10.87 mag, RP = 10.4 mag, BP = 11.18 mag
 Object Magnitude          : V = 15.44 mag
 Estimated Magnitude Drop  : 4.6 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 14.2 km  (src: astorb)
 Speed of the shadow       : 4.7 km/s
 Elongation to Moon & Sun  : 76° (sunlit = 89%), Sun = 139°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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