Cora»Occultation

2026-10-26 / UCAC4 521-002022 / (212) Medea

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Faustino Garcia	O+	CCD	T250	ES	GPS	20:55:00	20:56:58.03	20:57:05.54	20:59:00	0.138	0.138	7.51	82.6
2	show	Manuel Alfonso Coya Lozano, Juan Collada	O+	CCD	M356	ES	GPS	21:55:40	20:56:50.2	20:57:01.3	21:58:30	0.700	0.700	11.10	122.1
3	show	Anna Marciniak	O+	CCD	M350	PL	GPS	20:51:35	20:54:01.7	20:54:14.8	20:56:44	0.400	0.300	13.10	144.1

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):

JPL123 : 0441dfd0-d9b5-11f1-43f3-4c6825ce6bb6 [db: observed]

Using prediction 0441dfd0-d9b5-11f1-43f3-4c6825ce6bb6 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 = 163 x 113 km
a',b' = 81.3, 56.6 km
X0,Y0 = 1530.0, 53.4 km
Mean diameter = 136 km

From 3 chords (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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 0441dfd0-d9b5-11f1-43f3-4c6825ce6bb6 [observed] Occultation Date + Time : 2026-10-26 at 20:55:14 UT +/- 0.02 min [1] Object Designation : (212) Medea Orbit Class : MBA Star Designation : GDR3 2591003828074096896 Star Coordinates (ICRF) : RA = 01 10 14.2697, DE = +14 11 41.601 [2] Star Magnitudes : G = 12.86 mag, RP = 12.33 mag, BP = 13.22 mag Object Magnitude : V = 12.47 mag Estimated Magnitude Drop : 0.6 mag Estimated Max. Duration : 12.4 sec Object Mean Diameter : 136.1 km (src: astorb) Speed of the shadow : 11.0 km/s Elongation to Moon & Sun : 21° (sunlit = 99%), Sun = 167° Cross-track uncertainty : 3.3 mas = 4 km = 0.03 path-width (1-sig) RUWE and duplicate source : 1.12 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL123 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 0441dfd0-d9b5-11f1-43f3-4c6825ce6bb6 [observed]

 Occultation Date + Time   : 2026-10-26 at 20:55:14 UT +/- 0.02 min  [1]
 Object Designation        : (212) Medea
 Orbit Class               : MBA
 Star Designation          : GDR3 2591003828074096896
 Star Coordinates (ICRF)   : RA = 01 10 14.2697, DE = +14 11 41.601  [2]
 Star Magnitudes           : G = 12.86 mag, RP = 12.33 mag, BP = 13.22 mag
 Object Magnitude          : V = 12.47 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 12.4 sec
 Object Mean Diameter      : 136.1 km  (src: astorb)
 Speed of the shadow       : 11.0 km/s
 Elongation to Moon & Sun  : 21° (sunlit = 99%), Sun = 167°
 Cross-track uncertainty   : 3.3 mas = 4 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL123
 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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