Cora»Occultation

2023-12-16 / UCAC4 536-009262 / (1200) Imperatrix

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Peter Nosal	O+	VID	M250	SK	NTP	01:11:10	01:13:05.01	01:13:08.43	01:15:10	0.08	0.08	3.42	48.2

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#81 : 46eec3f0-ddb4-11f0-547e-e59dffffa7c0 [db: observed]

Using prediction 46eec3f0-ddb4-11f0-547e-e59dffffa7c0 for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2023-12-16, 01:13 UT (JD = 2460294.551)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 4487	1.0	17.778	343°, 68°	2.457229e6	3065.6	0.0°	None	2020-10-05	not scaled	2019-10-23
# 4488	1.0	17.778	182°, 51°	2.457229e6	3065.6	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] : 46eec3f0-ddb4-11f0-547e-e59dffffa7c0 [observed] Occultation Date + Time : 2023-12-16 at 01:17:49 UT +/- 0.0 min [1] Object Designation : (1200) Imperatrix Orbit Class : MBA Star Designation : GDR3 3313328885297274752 Star Coordinates (ICRF) : RA = 04 31 52.3304, DE = +17 01 16.982 [2] Star Magnitudes : G = 13.64 mag, RP = 12.99 mag, BP = 14.11 mag Object Magnitude : V = 15.9 mag Estimated Magnitude Drop : 2.4 mag Estimated Max. Duration : 2.8 sec Object Mean Diameter : 39.5 km (src: astorb) Speed of the shadow : 14.1 km/s Elongation to Moon & Sun : 124° (sunlit = 12%), Sun = 164° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#81 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 46eec3f0-ddb4-11f0-547e-e59dffffa7c0 [observed] Occultation Date + Time : 2023-12-16 at 01:17:49 UT +/- 0.0 min [1] Object Designation : (1200) Imperatrix Orbit Class : MBA Star Designation : GDR3 3313328885297274752 Star Coordinates (ICRF) : RA = 04 31 52.3304, DE = +17 01 16.982 [2] Star Magnitudes : G = 13.64 mag, RP = 12.99 mag, BP = 14.11 mag Object Magnitude : V = 15.9 mag Estimated Magnitude Drop : 2.4 mag Estimated Max. Duration : 2.8 sec Object Mean Diameter : 39.5 km (src: astorb) Speed of the shadow : 14.1 km/s Elongation to Moon & Sun : 124° (sunlit = 12%), Sun = 164° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#81 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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