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2021-04-12 / 4UC 549-018392 / (74) Galatea

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Olivier Schreurs O+ VID M406 BE GPS++ 21:05:55 21:06:52.80 21:06:55.00 21:07:54 0.08 0.08 2.20 69.1
2 show Simon Kidd O+ CCD M350 UK GPS++ 21:04:34 21:06:45.83 21:06:47.70 21:08:45 0.07 0.07 1.87 58.7
3 show William Stewart O+ VID M279 UK GPS++ 21:05:48 21:06:40.25 21:06:43.93 21:07:44 0.16 0.16 3.68 115.6
4 show Jan-Maarten Winkel O- VID M356 NL 21:05:51 21:07:51
5 show Tim Haymes O- CCD M279 UK 21:05:00 21:10:00
6 show Alex Pratt O- VID M279 UK 21:06:05 21:07:17
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

6 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#127 : c614e98a-bb69-4aff-a6f7-46d216c8a353 [db: observed]

Using prediction c614e98a-bb69-4aff-a6f7-46d216c8a353 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 = 120 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] : c614e98a-bb69-4aff-a6f7-46d216c8a353 [observed]

 Occultation Date + Time   : 2021-04-12 at 21:04:38 UT +/- 0.0 min  [1]
 Object Designation        : (74) Galatea
 Orbit Class               : MBA
 Star Designation          : GDR3 3399524339144465920
 Star Coordinates (ICRF)   : RA = 05 43 39.5745, DE = +19 43 13.216  [2]
 Star Magnitudes           : G = 13.52 mag, RP = 12.9 mag, BP = 13.97 mag
 Object Magnitude          : V = 14.43 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 3.8 sec
 Object Mean Diameter      : 119 km  (src: astorb)
 Speed of the shadow       : 31.4 km/s
 Elongation to Moon & Sun  : 54° (sunlit = 1%), Sun = 63°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#127

 Object is a Gaia mass determination target !

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

More Data and Informations
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