Cora»Occultation

2025-11-07 / TYC 1933-01672-1 / (133) Cyrene

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Juan Collada Barcena, Alfonso Coya	O+	CCD	M356	ES	GPS	23:23:02	23:24:12.973	23:24:32.621	23:26:01	0.065	0.065	19.65	80.6
2	show	Anna Marciniak	O+	CCD	M350	PL	NTP	23:27:53	23:29:00.01	23:29:15.81	23:33:22	0.050	0.050	15.80	64.8
3	show	Vytautas Gailevicius	O+	VID	M150	LT	GPS	23:30:36	23:31:01.6	23:31:10.3	23:31:35	0.400	0.400	8.70	35.7
4	show	Donatas Tamonis	O-	VID	M200	LT	GPS	23:30:06	::	::	23:32:04

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#115 : b8f59ab0-ddb8-11f0-547e-5037faff9f6b [db: observed]

Using prediction b8f59ab0-ddb8-11f0-547e-5037faff9f6b 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 = 107 x 55 km
a',b' = 53.4, 27.4 km
X0,Y0 = -104.2, 26.2 km
Mean diameter = 77 km

From 3 chords (CCD,VID)

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : b8f59ab0-ddb8-11f0-547e-5037faff9f6b [observed] Occultation Date + Time : 2025-11-07 at 23:43:43 UT +/- 0.04 min [1] Object Designation : (133) Cyrene Orbit Class : MBA Star Designation : GDR3 0874135834555680128 Star Coordinates (ICRF) : RA = 07 52 52.9647, DE = +26 20 15.969 [2] Star Magnitudes : G = 10.6 mag, RP = 10.09 mag, BP = 10.94 mag Object Magnitude : V = 13.94 mag Estimated Magnitude Drop : 3.4 mag Estimated Max. Duration : 16.4 sec Object Mean Diameter : 66.6 km (src: astorb) Speed of the shadow : 4.1 km/s Elongation to Moon & Sun : 35° (sunlit = 91%), Sun = 111° Cross-track uncertainty : 1.7 mas = 3 km = 0.05 path-width (1-sig) RUWE and duplicate source : 1.29 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#115 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : b8f59ab0-ddb8-11f0-547e-5037faff9f6b [observed]

 Occultation Date + Time   : 2025-11-07 at 23:43:43 UT +/- 0.04 min  [1]
 Object Designation        : (133) Cyrene
 Orbit Class               : MBA
 Star Designation          : GDR3 0874135834555680128
 Star Coordinates (ICRF)   : RA = 07 52 52.9647, DE = +26 20 15.969  [2]
 Star Magnitudes           : G = 10.6 mag, RP = 10.09 mag, BP = 10.94 mag
 Object Magnitude          : V = 13.94 mag
 Estimated Magnitude Drop  : 3.4 mag
 Estimated Max. Duration   : 16.4 sec
 Object Mean Diameter      : 66.6 km  (src: astorb)
 Speed of the shadow       : 4.1 km/s
 Elongation to Moon & Sun  : 35° (sunlit = 91%), Sun = 111°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.29 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#115
 Note                      : FP:true

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

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