Cora»Occultation

2026-03-18 / TYC 1444-01933-1 / (691) Lehigh

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Michel Boutet	O+	VID	M300	FR	GPS	19:20:03	19:22:48.84	19:22:54.36	19:25:31	0.080	0.080	5.52	78.9
2	show	Oliver Kloes	O+	CCD	M254	DE	GPS	19:20:19	19:22:20.43	19:22:25.73	19:24:19	0.100	0.100	5.30	75.8
3	show	Zdenek Sikac	O+	VID	T150	CZ	GPS	19:21:09	19:22:05.617	19:22:11.150	19:23:10	0.006	0.006	5.53	79.1
4	show	Jiri Kubanek	O+	VID	M200	CZ	GPS	19:21:10	19:22:06.562	19:22:12.216	19:23:10	0.018	0.018	5.65	80.8

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

4 observations found in db: sodis

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

JPL#115 : d3aa4bc0-de6d-11f0-4858-3bbfe94f3c09 [db: asteroids]

Using prediction d3aa4bc0-de6d-11f0-4858-3bbfe94f3c09 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:
Size = 110 x 50 km
a',b' = 54.8, 24.9 km
X0,Y0 = -910.2, 23.2 km
Mean diameter = 74 km

From 4 chords (CCD,VID)

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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : d3aa4bc0-de6d-11f0-4858-3bbfe94f3c09 [asteroids] Occultation Date + Time : 2026-03-18 at 19:16:28 UT +/- 0.01 min [1] Object Designation : (691) Lehigh Orbit Class : MBA Star Designation : GDR3 3951210075112989824 Star Coordinates (ICRF) : RA = 12 05 33.9805, DE = +19 37 00.755 [2] Star Magnitudes : G = 10.3 mag, RP = 9.67 mag, BP = 10.76 mag Object Magnitude : V = 14.2 mag Estimated Magnitude Drop : 3.9 mag Estimated Max. Duration : 6.1 sec Object Mean Diameter : 87.7 km (src: astorb) Speed of the shadow : 14.3 km/s Elongation to Moon & Sun : 160° (sunlit = 0%), Sun = 161° Cross-track uncertainty : 1.2 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 2.44 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#115 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : d3aa4bc0-de6d-11f0-4858-3bbfe94f3c09 [asteroids]

 Occultation Date + Time   : 2026-03-18 at 19:16:28 UT +/- 0.01 min  [1]
 Object Designation        : (691) Lehigh
 Orbit Class               : MBA
 Star Designation          : GDR3 3951210075112989824
 Star Coordinates (ICRF)   : RA = 12 05 33.9805, DE = +19 37 00.755  [2]
 Star Magnitudes           : G = 10.3 mag, RP = 9.67 mag, BP = 10.76 mag
 Object Magnitude          : V = 14.2 mag
 Estimated Magnitude Drop  : 3.9 mag
 Estimated Max. Duration   : 6.1 sec
 Object Mean Diameter      : 87.7 km  (src: astorb)
 Speed of the shadow       : 14.3 km/s
 Elongation to Moon & Sun  : 160° (sunlit = 0%), Sun = 161°
 Cross-track uncertainty   : 1.2 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 2.44 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#115
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

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