Cora»Occultation

2026-09-17 / UCAC4 526-150980 / (170) Maria

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Petr Zeleny	O+	VID	M250	CZ	GPS	18:59:04	19:01:06.08	19:01:08.92	19:03:28	0.030	0.030	2.84	33.5
2	show	Leszek Benedyktowicz	O+	VID	M200	PL	GPS	19:00:22	19:00:52.930	19:00:56.16	19:01:25	0.030	0.030	3.23	38.1
3	show	Marcin Filipek	O+	VID	M250	PL	GPS	19:00:26	19:00:54.009	19:00:57.143	19:01:26	0.015	0.010	3.13	36.9
4	show	Daniel Blazewicz	O-	VID	M350	PL	GPS	18:59:48	::	::	19:02:11

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):

JPL80 : ae227000-d9b0-11f1-43f3-07e8e17f76c6 [db: observed]

Using prediction ae227000-d9b0-11f1-43f3-07e8e17f76c6 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 = 41 x 26 km
a',b' = 20.7, 13.1 km
X0,Y0 = 906.7, 24.9 km
Mean diameter = 33 km

From 3 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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Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : ae227000-d9b0-11f1-43f3-07e8e17f76c6 [observed] Occultation Date + Time : 2026-09-17 at 18:58:01 UT +/- 0.01 min [1] Object Designation : (170) Maria Orbit Class : MBA Star Designation : GDR3 2815769671516121344 Star Coordinates (ICRF) : RA = 23 09 22.9747, DE = +15 02 48.590 [2] Star Magnitudes : G = 11.63 mag, RP = 10.96 mag, BP = 12.15 mag Object Magnitude : V = 12.94 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 3.8 sec Object Mean Diameter : 44.3 km (src: astorb) Speed of the shadow : 11.8 km/s Elongation to Moon & Sun : 102° (sunlit = 40%), Sun = 161° Cross-track uncertainty : 2.3 mas = 2 km = 0.06 path-width (1-sig) RUWE and duplicate source : 0.95 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL80 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : ae227000-d9b0-11f1-43f3-07e8e17f76c6 [observed]

 Occultation Date + Time   : 2026-09-17 at 18:58:01 UT +/- 0.01 min  [1]
 Object Designation        : (170) Maria
 Orbit Class               : MBA
 Star Designation          : GDR3 2815769671516121344
 Star Coordinates (ICRF)   : RA = 23 09 22.9747, DE = +15 02 48.590  [2]
 Star Magnitudes           : G = 11.63 mag, RP = 10.96 mag, BP = 12.15 mag
 Object Magnitude          : V = 12.94 mag
 Estimated Magnitude Drop  : 1.6 mag
 Estimated Max. Duration   : 3.8 sec
 Object Mean Diameter      : 44.3 km  (src: astorb)
 Speed of the shadow       : 11.8 km/s
 Elongation to Moon & Sun  : 102° (sunlit = 40%), Sun = 161°
 Cross-track uncertainty   : 2.3 mas = 2 km = 0.06 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL80
 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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