Cora»Occultation

2025-09-16 / UCAC4 540-017355 / (335) Roberta

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michael OConnell	O+	VID	M350	ES	NTP	05:24:25	05:25:23.54	05:25:27.90	05:26:24	0.200	0.200	4.36	66.7

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

1 observation found in db: sodis

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

JPL#95 : 6f1dc120-ddb7-11f0-547e-eda67adff99e [db: observed]

Using prediction 6f1dc120-ddb7-11f0-547e-eda67adff99e for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2025-09-16, 05:25 UT (JD = 2460934.726)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 3100	3.0	12.027	105°, 48°	2.444754e6	16180.7	0.0°	None	2019-06-25	100.0 +/- 11.0 km	2019-06-24
# 3101	3.0	12.027	297°, 54°	2.444754e6	16180.7	0.0°	None	2019-06-25	98.0 +/- 9.0 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] : 6f1dc120-ddb7-11f0-547e-eda67adff99e [observed] Occultation Date + Time : 2025-09-16 at 05:27:03 UT +/- 0.0 min [1] Object Designation : (335) Roberta Orbit Class : MBA Star Designation : GDR3 3397523644596774528 Star Coordinates (ICRF) : RA = 05 37 44.8843, DE = +17 55 09.333 [2] Star Magnitudes : G = 14.55 mag, RP = 13.74 mag, BP = 15.25 mag Object Magnitude : V = 14.38 mag Estimated Magnitude Drop : 0.7 mag Estimated Max. Duration : 5.8 sec Object Mean Diameter : 89.1 km (src: astorb) Speed of the shadow : 15.3 km/s Elongation to Moon & Sun : 24° (sunlit = 31%), Sun = 89° 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#95 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 6f1dc120-ddb7-11f0-547e-eda67adff99e [observed] Occultation Date + Time : 2025-09-16 at 05:27:03 UT +/- 0.0 min [1] Object Designation : (335) Roberta Orbit Class : MBA Star Designation : GDR3 3397523644596774528 Star Coordinates (ICRF) : RA = 05 37 44.8843, DE = +17 55 09.333 [2] Star Magnitudes : G = 14.55 mag, RP = 13.74 mag, BP = 15.25 mag Object Magnitude : V = 14.38 mag Estimated Magnitude Drop : 0.7 mag Estimated Max. Duration : 5.8 sec Object Mean Diameter : 89.1 km (src: astorb) Speed of the shadow : 15.3 km/s Elongation to Moon & Sun : 24° (sunlit = 31%), Sun = 89° 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#95 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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