Cora»Occultation

2025-09-23 / UCAC4 536-001170 / (1234) Elyna

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Zdenek Moravec	O+	CCD	T600	CZ	GPS	21:35:44	21:36:42.51	21:36:43.71	21:37:43	0.050	0.050	1.20	12.7
2	show	Sergey Shurpakov	O+	VID	T200	BY	GPS	21:33:54	21:34:52.6	21:34:55.3	21:35:56	0.190	0.300	2.70	28.6
3	show	Daniel Antuszewicz	O-	VID	M300	PL	NTP	21:35:00	::	::	21:36:58

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

3 observations found in db: sodis

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

JPL#76 : 72c66150-ddb8-11f0-547e-81bebf64b8e0 [db: observed]

Using prediction 72c66150-ddb8-11f0-547e-81bebf64b8e0 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 = 760.3, 49.4 km
Circular diameter = 46 km

From 2 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).

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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 72c66150-ddb8-11f0-547e-81bebf64b8e0 [observed] Occultation Date + Time : 2025-09-23 at 21:34:50 UT +/- 0.01 min [1] Object Designation : (1234) Elyna Orbit Class : MBA Star Designation : GDR3 2782441653012156800 Star Coordinates (ICRF) : RA = 00 37 13.9519, DE = +17 05 52.789 [2] Star Magnitudes : G = 13.4 mag, RP = 12.94 mag, BP = 13.7 mag Object Magnitude : V = 14.96 mag Estimated Magnitude Drop : 1.8 mag Estimated Max. Duration : 2.5 sec Object Mean Diameter : 26.0 km (src: astorb) Speed of the shadow : 10.6 km/s Elongation to Moon & Sun : 167° (sunlit = 4%), Sun = 161° Cross-track uncertainty : 1.3 mas = 1 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#76 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 72c66150-ddb8-11f0-547e-81bebf64b8e0 [observed] Occultation Date + Time : 2025-09-23 at 21:34:50 UT +/- 0.01 min [1] Object Designation : (1234) Elyna Orbit Class : MBA Star Designation : GDR3 2782441653012156800 Star Coordinates (ICRF) : RA = 00 37 13.9519, DE = +17 05 52.789 [2] Star Magnitudes : G = 13.4 mag, RP = 12.94 mag, BP = 13.7 mag Object Magnitude : V = 14.96 mag Estimated Magnitude Drop : 1.8 mag Estimated Max. Duration : 2.5 sec Object Mean Diameter : 26.0 km (src: astorb) Speed of the shadow : 10.6 km/s Elongation to Moon & Sun : 167° (sunlit = 4%), Sun = 161° Cross-track uncertainty : 1.3 mas = 1 km = 0.07 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#76 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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