Cora»Occultation

2025-08-17 / UCAC4 364-156611 / (28303) 1999 CY72

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Julia Perla	O+	CCD	M400	PL	GPS	22:43:28	22:45:17.1	22:45:18.6	22:47:22	0.500	0.500	1.50	6.3
2	show	Anna Marciniak	O+	CCD	M350	PL	GPS	22:44:35	22:45:34.6	22:45:36.8	22:46:38	0.400	0.400	2.20	9.2

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#62 : 5f3778f0-ddb7-11f0-547e-64d4ffe59f47 [db: observed]

Using prediction 5f3778f0-ddb7-11f0-547e-64d4ffe59f47 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 = -2430.9, 14.2 km
Circular diameter = 12 km

From 2 chords (CCD)

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If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 5f3778f0-ddb7-11f0-547e-64d4ffe59f47 [observed] Occultation Date + Time : 2025-08-17 at 22:45:50 UT +/- 0.01 min [1] Object Designation : (28303) 1999 CY72 Orbit Class : MBA Star Designation : GDR3 4086989796855861632 Star Coordinates (ICRF) : RA = 18 56 13.9466, DE = -17 19 32.881 [2] Star Magnitudes : G = 13.59 mag, RP = 13.03 mag, BP = 13.96 mag Object Magnitude : V = 17.8 mag Estimated Magnitude Drop : 4.2 mag Estimated Max. Duration : 1.4 sec Object Mean Diameter : 5.9 km (src: astorb) Speed of the shadow : 4.2 km/s Elongation to Moon & Sun : 152° (sunlit = 31%), Sun = 138° Cross-track uncertainty : 0.7 mas = 0 km = 0.14 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#62 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 5f3778f0-ddb7-11f0-547e-64d4ffe59f47 [observed]

 Occultation Date + Time   : 2025-08-17 at 22:45:50 UT +/- 0.01 min  [1]
 Object Designation        : (28303) 1999 CY72
 Orbit Class               : MBA
 Star Designation          : GDR3 4086989796855861632
 Star Coordinates (ICRF)   : RA = 18 56 13.9466, DE = -17 19 32.881  [2]
 Star Magnitudes           : G = 13.59 mag, RP = 13.03 mag, BP = 13.96 mag
 Object Magnitude          : V = 17.8 mag
 Estimated Magnitude Drop  : 4.2 mag
 Estimated Max. Duration   : 1.4 sec
 Object Mean Diameter      : 5.9 km  (src: astorb)
 Speed of the shadow       : 4.2 km/s
 Elongation to Moon & Sun  : 152° (sunlit = 31%), Sun = 138°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.14 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#62
 Note                      : FP:true

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

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