Cora»Occultation

2025-10-03 / UCAC4 468-003944 / (351) Yrsa

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Deborah Smith	O+	VID	M300	ES	GPS	03:15:29	03:17:30.690	03:17:35.255	03:19:29	0.022	0.022	4.56	35.6
2	show	Deborah Smith	O-	VID	M200	ES	GPS	03:15:34	::	::	03:19:34

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#80 : 7fb42a00-ddb8-11f0-547e-20d27f4f6524 [db: observed]

Using prediction 7fb42a00-ddb8-11f0-547e-20d27f4f6524 for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2025-10-03, 03:16 UT (JD = 2460951.636)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 484	None	13.312	193°, -41°	2.450699e6	10252.6	0.0°	None	None	not scaled	2013-02-11
# 485	None	13.312	20°, -70°	2.450699e6	10252.6	0.0°	None	None	not scaled	2013-02-11

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] : 7fb42a00-ddb8-11f0-547e-20d27f4f6524 [observed] Occultation Date + Time : 2025-10-03 at 03:23:42 UT +/- 0.02 min [1] Object Designation : (351) Yrsa Orbit Class : MBA Star Designation : GDR3 0001686723852064128 Star Coordinates (ICRF) : RA = 02 54 21.4872, DE = +03 27 08.954 [2] Star Magnitudes : G = 13.18 mag, RP = 12.57 mag, BP = 13.63 mag Object Magnitude : V = 13.48 mag Estimated Magnitude Drop : 0.9 mag Estimated Max. Duration : 5.1 sec Object Mean Diameter : 39.6 km (src: astorb) Speed of the shadow : 7.8 km/s Elongation to Moon & Sun : 85° (sunlit = 80%), Sun = 146° Cross-track uncertainty : 2.0 mas = 2 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.96 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#80 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 7fb42a00-ddb8-11f0-547e-20d27f4f6524 [observed] Occultation Date + Time : 2025-10-03 at 03:23:42 UT +/- 0.02 min [1] Object Designation : (351) Yrsa Orbit Class : MBA Star Designation : GDR3 0001686723852064128 Star Coordinates (ICRF) : RA = 02 54 21.4872, DE = +03 27 08.954 [2] Star Magnitudes : G = 13.18 mag, RP = 12.57 mag, BP = 13.63 mag Object Magnitude : V = 13.48 mag Estimated Magnitude Drop : 0.9 mag Estimated Max. Duration : 5.1 sec Object Mean Diameter : 39.6 km (src: astorb) Speed of the shadow : 7.8 km/s Elongation to Moon & Sun : 85° (sunlit = 80%), Sun = 146° Cross-track uncertainty : 2.0 mas = 2 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.96 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#80 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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