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2026-04-06 / UCAC4 506-032752 / (194) Prokne

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Javier Prat, Pedro Martorell, +1 O+ CCD M310 ES GPS 21:36:39 21:38:07.700 21:38:12.8 21:39:46 0.300 0.400 5.10 91.3
2 show Yves Argentin O+ VID M305 FR GPS 21:37:32 21:38:10.66 21:38:18.96 21:39:01 0.080 0.040 8.30 148.6
3 show Christian SARTINI O+ VID M230 FR GPS 21:37:20 21:38:14.25 21:38:23.52 21:39:16 0.050 0.080 9.27 165.9
4 show Manuel Alfonso Coya Lozano, Juan Collada Barcena O+ CCD M356 ES GPS 21:36:59 21:37:55.3 21:38:00.8 21:38:59 0.300 0.300 5.50 98.4
5 show Cédric Latgé O+ VID M230 FR GPS 21:37:00 21:38:13.18 21:38:22.54 21:39:20 0.090 0.090 9.36 167.5
6 show jean-christophe Lachurie O+ VID M280 FR GPS 21:37:59 21:38:13.18 21:38:22.53 21:38:30 0.020 0.030 9.35 167.4
7 show Matthieu Conjat O+ VID T400 FR GPS 21:36:53 21:38:26.64 21:38:35.96 21:39:42 0.040 0.050 9.32 166.8
8 show Marc Serrau O+ VID T400 FR GPS 21:37:12 21:38:22.57 21:38:31.17 21:39:32 0.050 0.050 8.60 153.9
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

8 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#171 : 40b6adc0-33bf-11f1-6999-4063fbde3d66 [db: asteroids]

Using prediction 40b6adc0-33bf-11f1-6999-4063fbde3d66 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 = 171 x 137 km
a',b' = 85.5, 68.7 km
X0,Y0 = 766.6, 12.7 km
Mean diameter = 153 km

From 8 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).
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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 40b6adc0-33bf-11f1-6999-4063fbde3d66 [asteroids]

 Occultation Date + Time   : 2026-04-06 at 21:33:30 UT +/- 0.0 min  [1]
 Object Designation        : (194) Prokne
 Orbit Class               : MBA
 Star Designation          : GDR3 3159106574023123968
 Star Coordinates (ICRF)   : RA = 06 53 41.0301, DE = +11 02 03.241  [2]
 Star Magnitudes           : G = 12.79 mag, RP = 12.35 mag, BP = 13.06 mag
 Object Magnitude          : V = 13.71 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 9.4 sec
 Object Mean Diameter      : 168.4 km  (src: astorb)
 Speed of the shadow       : 17.9 km/s
 Elongation to Moon & Sun  : 144° (sunlit = 80%), Sun = 86°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.24 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#171
 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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