Cora»Occultation

2023-09-24 / TYC 0187-01324-1 / (1264) Letaba

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Olivier Schreurs, Esteban Fernandez-Pelaez	O+	VID	M410	BE	GPS	01:20:41	01:21:40.61	01:21:42.52	01:22:42	0.04	0.04	1.91	55.8
2	show	Zdenek Moravec, Bohuslav Matouš	O+	CCD	T432	CZ	GPS	01:20:46	1:21:43.33	1:21:45.58	01:22:45	0.10	0.15	2.25	65.7

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

2 observations found in db: sodis

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

JPL#80 : 225ac070-ddb4-11f0-547e-37e2bfed6f02 [db: observed]

Using prediction 225ac070-ddb4-11f0-547e-37e2bfed6f02 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 = -1048.2, 52.0 km
Circular diameter = 70 km

From 2 chords (VID,CCD)

You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
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] : 225ac070-ddb4-11f0-547e-37e2bfed6f02 [observed] Occultation Date + Time : 2023-09-24 at 01:25:07 UT +/- 0.0 min [1] Object Designation : (1264) Letaba Orbit Class : MBA Star Designation : GDR3 3137300028630161408 Star Coordinates (ICRF) : RA = 07 41 30.4235, DE = +04 30 48.140 [2] Star Magnitudes : G = 10.67 mag, RP = 10.02 mag, BP = 11.16 mag Object Magnitude : V = 15.86 mag Estimated Magnitude Drop : 5.2 mag Estimated Max. Duration : 2.6 sec Object Mean Diameter : 74.7 km (src: astorb) Speed of the shadow : 29.2 km/s Elongation to Moon & Sun : 156° (sunlit = 64%), Sun = 65° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.66 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] : 225ac070-ddb4-11f0-547e-37e2bfed6f02 [observed] Occultation Date + Time : 2023-09-24 at 01:25:07 UT +/- 0.0 min [1] Object Designation : (1264) Letaba Orbit Class : MBA Star Designation : GDR3 3137300028630161408 Star Coordinates (ICRF) : RA = 07 41 30.4235, DE = +04 30 48.140 [2] Star Magnitudes : G = 10.67 mag, RP = 10.02 mag, BP = 11.16 mag Object Magnitude : V = 15.86 mag Estimated Magnitude Drop : 5.2 mag Estimated Max. Duration : 2.6 sec Object Mean Diameter : 74.7 km (src: astorb) Speed of the shadow : 29.2 km/s Elongation to Moon & Sun : 156° (sunlit = 64%), Sun = 65° Cross-track uncertainty : 0.3 mas = 0 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.66 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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