Cora»Occultation

2025-08-18 / UCAC4 561-017092 / (266) Aline

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Joachim Siegert	O+	VID	M203	DE	GPS	01:35:38	01:36:38.12	01:36:40.37	01:37:38	0.130	0.130	2.25	71.3
2	show	Michal Rottenborn	O+	VID	M254	CZ	GPS	01:35:39	01:36:39.580	01:36:42.020	01:37:39	0.030	0.040	2.44	77.3
3	show	Jiri Polak	O+	VID	M300	CZ	NTP	01:34:39	01:36:39.73	01:36:42.03	01:38:39	0.050	0.050	2.30	72.9
4	show	Marek Zawilski	O+	VID	M200	PL	GPS	01:35:53	01:36:47.7	01:36:50.9	01:37:52	0.300	0.300	3.20	101.4

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#145 : 4978c2d0-ddb7-11f0-547e-c3ef6b775230 [db: observed]

Using prediction 4978c2d0-ddb7-11f0-547e-c3ef6b775230 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 104 km

From 4 chords (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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Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 4978c2d0-ddb7-11f0-547e-c3ef6b775230 [observed] Occultation Date + Time : 2025-08-18 at 01:39:02 UT +/- 0.0 min [1] Object Designation : (266) Aline Orbit Class : MBA Star Designation : GDR3 3403936236928016896 Star Coordinates (ICRF) : RA = 05 29 24.7324, DE = +22 05 52.376 [2] Star Magnitudes : G = 13.04 mag, RP = 12.52 mag, BP = 13.38 mag Object Magnitude : V = 13.87 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 3.4 sec Object Mean Diameter : 109.1 km (src: astorb) Speed of the shadow : 31.7 km/s Elongation to Moon & Sun : 7° (sunlit = 29%), Sun = 62° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#145 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and DB] : 4978c2d0-ddb7-11f0-547e-c3ef6b775230 [observed] Occultation Date + Time : 2025-08-18 at 01:39:02 UT +/- 0.0 min [1] Object Designation : (266) Aline Orbit Class : MBA Star Designation : GDR3 3403936236928016896 Star Coordinates (ICRF) : RA = 05 29 24.7324, DE = +22 05 52.376 [2] Star Magnitudes : G = 13.04 mag, RP = 12.52 mag, BP = 13.38 mag Object Magnitude : V = 13.87 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 3.4 sec Object Mean Diameter : 109.1 km (src: astorb) Speed of the shadow : 31.7 km/s Elongation to Moon & Sun : 7° (sunlit = 29%), Sun = 62° Cross-track uncertainty : 0.7 mas = 1 km = 0.01 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#145 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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