Cora»Occultation

2025-08-21 / UCAC4 605-106890 / (5222) Ioffe

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Zdenek Sikac	O+	VID	T150	CZ	NTP	20:25:40	20:26:39.77	20:26:40.59	20:27:40	0.080	0.080	0.82	11.2

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

1 observation found in db: sodis

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

JPL#70 : 4e632740-ddb7-11f0-547e-c384fff527db [db: observed]

Using prediction 4e632740-ddb7-11f0-547e-c384fff527db for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2025-08-21, 20:26 UT (JD = 2460909.351)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 5505	1.0	9.739	280°, -12°	2.45723e6	3679.4	0.0°	None	2020-10-05	not scaled	2019-10-23
# 5506	1.0	9.739	54°, -52°	2.45723e6	3679.4	0.0°	None	2020-10-05	not scaled	2019-10-23

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] : 4e632740-ddb7-11f0-547e-c384fff527db [observed] Occultation Date + Time : 2025-08-21 at 20:27:38 UT +/- 0.0 min [1] Object Designation : (5222) Ioffe Orbit Class : MBA Star Designation : GDR3 1861601248887159936 Star Coordinates (ICRF) : RA = 20 21 39.9144, DE = +30 51 31.501 [2] Star Magnitudes : G = 12.53 mag, RP = 12.02 mag, BP = 12.87 mag Object Magnitude : V = 16.52 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 1.6 sec Object Mean Diameter : 22.0 km (src: astorb) Speed of the shadow : 13.7 km/s Elongation to Moon & Sun : 128° (sunlit = 2%), Sun = 131° Cross-track uncertainty : 0.7 mas = 1 km = 0.05 path-width (1-sig) RUWE and duplicate source : 0.86 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#70 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 4e632740-ddb7-11f0-547e-c384fff527db [observed] Occultation Date + Time : 2025-08-21 at 20:27:38 UT +/- 0.0 min [1] Object Designation : (5222) Ioffe Orbit Class : MBA Star Designation : GDR3 1861601248887159936 Star Coordinates (ICRF) : RA = 20 21 39.9144, DE = +30 51 31.501 [2] Star Magnitudes : G = 12.53 mag, RP = 12.02 mag, BP = 12.87 mag Object Magnitude : V = 16.52 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 1.6 sec Object Mean Diameter : 22.0 km (src: astorb) Speed of the shadow : 13.7 km/s Elongation to Moon & Sun : 128° (sunlit = 2%), Sun = 131° Cross-track uncertainty : 0.7 mas = 1 km = 0.05 path-width (1-sig) RUWE and duplicate source : 0.86 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#70 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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