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2020-04-10 / 4UC 456-053477 / (5638) Deikoon

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Marek Harman O+ CCD M250 SK NTP 19:26:03 19:27:42.28 19:27:43.82 19:29:02 0.22 0.22 1.54 24.5
2 show Petr Zeleny O+ CCD M254 CZ GPS++ 19:26:15 19:27:43.78 19:27:45.28 21:48:45 0.27 0.27 1.50 23.9
3 show Chad Ellington O+ VID M250 DE GPS++ 19:27:06 19:28:05.51 19:28:06.71 19:29:14 0.17 0.17 1.20 19.1
4 show Bjoern Kattentidt O- VID M279 DE 19:25:31 19:29:28
5 show Oliver Kloes O- CCD M254 DE 19:27:32 19:29:32
6 show O. Schreurs et al O- VID M406 BE 19:26:57 19:29:18
7 show Christian Weber O- CCD M203 DE 19:26:20 19:28:18
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

7 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#48 : 4a486206-ef81-4bbb-947d-6d37b70ea759 [db: observed]

Using prediction 4a486206-ef81-4bbb-947d-6d37b70ea759 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 = 174 x 46 km
a',b' = 87.1, 23.2 km
X0,Y0 = -1238.9, 18.1 km
Mean diameter = 90 km

From 3 chords (VID,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).

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 4a486206-ef81-4bbb-947d-6d37b70ea759 [observed]

 Occultation Date + Time   : 2020-04-10 at 19:22:16 UT +/- 0.04 min  [1]
 Object Designation        : (5638) Deikoon
 Orbit Class               : JTRO
 Star Designation          : GDR3 3711100340746857088
 Star Coordinates (ICRF)   : RA = 13 30 20.8176, DE = +01 00 07.560  [2]
 Star Magnitudes           : G = 12.68 mag, RP = 12.19 mag, BP = 12.99 mag
 Object Magnitude          : V = 17.2 mag
 Estimated Magnitude Drop  : 4.5 mag
 Estimated Max. Duration   : 1.6 sec
 Object Mean Diameter      : 26 km  (src: astorb)
 Speed of the shadow       : 15.9 km/s
 Elongation to Moon & Sun  : 39° (sunlit = 90%), Sun = 170°
 Cross-track uncertainty   : 3.7 mas = 10 km = 0.40 path-width (1-sig)
 RUWE and duplicate source : 3.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#48

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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