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2019-09-29 / 4UC 418-000694 / (52) Europa

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Denis Marchais O+ CCD M406 FR NTP 03:01:25 03:02:17.18 03:02:39.90 03:03:24 0.02 0.02 22.72 302.2
2 show P. Andre et al O+ VID M200 FR GPS++ 02:57:25 03:02:16.92 03:02:39.82 03:10:03 0.17 0.15 22.90 304.6
3 show Eric Frappa O+ VID M203 FR GPS++ 03:00:51 03:02:29.78 03:02:49.03 03:04:13 0.13 0.40 19.25 256.0
4 show Jean-Marc Lechopier O+ CCD M235 FR NTP 02:58:09 03:02:12.94 03:02:36.17 03:12:02 0.16 0.23 23.23 309.0
5 show Alexandre Cazaux O+ VID M180 FR GPS++ 03:00:34 03:02:24.61 03:02:40.19 03:05:38 0.10 0.24 15.58 207.2
6 show Jean-Louis Penninckx O+ CCD M102 FR GPS++ 03:03:47 03:02:19.28 03:02:30.11 03:04:00 0.20 0.10 10.83 144.0
7 show Stefan Meister O+ CCD M500 CH GPS 03:01:26 03:02:10.90 03:02:21.37 03:03:05 0.06 0.33 10.47 139.3
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#125 : 810cf57e-d8ce-49bd-aa69-6197c34e6058 [db: observed]

Using prediction 810cf57e-d8ce-49bd-aa69-6197c34e6058 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 = 373 x 295 km
a',b' = 186.7, 147.4 km
X0,Y0 = 1197.1, 6.9 km
Mean diameter = 332 km

From 7 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).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2019-09-29, 03:01 UT (JD = 2458755.626)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 135None5.630 251°, 35° 2.44535930436e613396.30.0° based on an older lightcurve data set, size from AO is 277+/-25 km2013-07-23 293.0 +/- 30.0 km 2011-03-28
# 4634.05.630 259°, 39° 2.44535930436e613396.30.0° None2017-06-19 319.0 +/- 5.0 km 2017-06-13
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : 810cf57e-d8ce-49bd-aa69-6197c34e6058 [observed]

 Occultation Date + Time   : 2019-09-29 at 03:08:58 UT +/- 0.01 min  [1]
 Object Designation        : (52) Europa
 Orbit Class               : MBA
 Star Designation          : GDR3 2526615087122412032
 Star Coordinates (ICRF)   : RA = 00 31 28.9284, DE = -06 31 24.026  [2]
 Star Magnitudes           : G = 12.26 mag, RP = 11.58 mag, BP = 12.79 mag
 Object Magnitude          : V = 11.13 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 22.7 sec
 Object Mean Diameter      : 303 km  (src: astorb)
 Speed of the shadow       : 13.3 km/s
 Elongation to Moon & Sun  : 173° (sunlit = 0%), Sun = 171°
 Cross-track uncertainty   : 2.0 mas = 3 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 2.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#125

 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
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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