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2018-07-05 / TYC 6318-01656-1 / (52) Europa

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jesus Delgado O+ CCD M235 ES NTP 03:06:55 03:07:10.55 03:07:31.41 03:07:40 0.08 0.08 20.86 273.3
2 show C. Perello/A. Selva O+ VID M500 ES GPS++ 03:05:07 03:06:31.04 03:06:52.12 03:08:06 0.08 0.84 21.08 276.1
3 show Joan Rovira O+ VID M250 ES GPS++ 03:05:08 03:06:30.21 03:06:52.38 03:10:38 0.03 0.02 22.17 290.4
4 show C. Perello/A. Selva O+ VID M500 ES NTP 03:05:59 03:06:36.4 03:07:00.7 03:08:03 0.7 0.7 24.30 318.3
5 show Gerard Vaudescal O+ VID M305 FR GPS++ 03:05:38 03:06:45.60 03:07:05.00 03:07:57 0.08 0.04 19.40 254.1
6 show Michel Boutet O+ VID M300 FR GPS++ 03:04:57 03:06:36.27 03:07:00.11 03:09:06 0.32 0.16 23.84 312.3
7 show Emmanuel Arbouch O+ CCD M114 FR NTP 03:05:21 03:06:19.32 03:06:41.98 03:07:59 1.20 0.55 22.66 296.8
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 : 41793070-beaa-45ac-a315-4d90abbc261f [db: observed]

Using prediction 41793070-beaa-45ac-a315-4d90abbc261f 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 = 339 x 293 km
a',b' = 169.6, 146.5 km
X0,Y0 = 1390.9, 32.6 km
Mean diameter = 315 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: 2018-07-05, 03:07 UT (JD = 2458304.630)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 135None5.630 251°, 35° 2.44535930436e612945.30.0° 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° 2.44535930436e612945.30.0° 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] : 41793070-beaa-45ac-a315-4d90abbc261f [observed]

 Occultation Date + Time   : 2018-07-05 at 03:11:45 UT +/- 0.01 min  [1]
 Object Designation        : (52) Europa
 Orbit Class               : MBA
 Star Designation          : GDR3 6873695557789831680
 Star Coordinates (ICRF)   : RA = 20 07 38.8689, DE = -17 42 10.560  [2]
 Star Magnitudes           : G = 10.31 mag, RP = 9.8 mag, BP = 10.64 mag
 Object Magnitude          : V = 11.7 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 23.2 sec
 Object Mean Diameter      : 303 km  (src: astorb)
 Speed of the shadow       : 13.1 km/s
 Elongation to Moon & Sun  : 59° (sunlit = 62%), Sun = 163°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.84 mas, dup.src = 1  (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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