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2023-09-23 / UCAC4 350-112253 / (52) Europa

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jesus Delgado O+ CCD M280 ES GPS 2:06:41. 20:08:34.72 20:08:54.67 20:10:38 0.15 0.15 19.95 347.1
2 show Eric Smith, Deborah Smith, +1 O+ CCD M280 ES NTP 20:06:50 20:08:47.65 20:09:07.85 20:10:10 0.13 0.13 20.20 351.5
3 show Eric Smith, Deborah Smith O+ CCD M235 ES NTP 20:06:01 20:08:47.42 20:09:07.85 20:10:36 0.1532 0.1532 20.43 355.5
4 show Rafael G Farfan O+ DRS M280 ES NTP 20:08:31 20:08:37.80 20:08:59.38 20:09:33 0.09 0.09 21.58 375.5
5 show Javier De Elías O+ VID M306 ES NTP 20:07:13 20:08:48.06 20:09:09.18 20:10:54 0.05 0.05 21.12 367.5
6 show Rui Goncalves O+ VID M256 PT GPS 20:07:09 20:08:18.44 20:08:38.46 20:09:44 0.10 0.12 20.02 348.3
7 show Ramon Iglesias O+ CCD T400 ES NTP 20:00:36 20:08:49.200 20:09:08.100 20:14:21 1.00 1.00 18.90 328.9
8 show Carles Schnabel O+ VID M280 ES GPS 20:07:21 20:08:59.31 20:09:12.24 20:11:17 0.08 0.08 12.93 225.0
9 show Oscar Canales, Fernando Campos-Chema Oncins O+ CCD M230 ES GPS 20:06:55 20:08:50.346 20:08:59.081 20:10:55 0.066 0.066 8.74 152.1
10 show Bernat Garreta O+ CCD M200 ES NTP 20:08:07 20:09:00.55 20:09:12.95 20:10:03 0.15 0.08 12.40 215.8
11 show Jorge JUAN O+ VID M410 ES GPS 20:07:21 20:08:59.34 20:09:10.14 20:11:03 0.04 0.04 10.80 187.9
12 show Antoni Selva, Carlos Perello, +1 O+ VID M500 ES GPS 20:07:07 20:09:00.410 20:09:11.620 20:11:06 0.02 0.03 11.21 195.1
13 show joan rovira O+ VID M250 ES GPS 20:06:00 20:09:03.67 20:09:05.65 20:12:00 0.08 0.04 1.98 34.5
14 show Faustino Garcia O- VID L80 ES GPS 20:07:26 20:09:26
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

14 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#125 : 1a7831c5-bc97-46c9-8fc5-688845d1f9f6 [db: observed]

Using prediction 1a7831c5-bc97-46c9-8fc5-688845d1f9f6 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 304 km
a',b' = 186.7, 151.8 km
X0,Y0 = -1214.3, 17.4 km
Mean diameter = 337 km

From 13 chords (DRS,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).
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: 2023-09-23, 20:07 UT (JD = 2460211.338)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 135None5.630 251°, 35° 2.44535930436e614852.00.0° 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° 2.44535930436e614852.00.0° 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] : 1a7831c5-bc97-46c9-8fc5-688845d1f9f6 [observed]

 Occultation Date + Time   : 2023-09-23 at 20:07:15 UT +/- 0.01 min  [1]
 Object Designation        : (52) Europa
 Orbit Class               : MBA
 Star Designation          : GDR3 4119724246550093696
 Star Coordinates (ICRF)   : RA = 17 44 00.0588, DE = -20 05 33.505  [2]
 Star Magnitudes           : G = 11.71 mag, RP = 10.6 mag, BP = 12.99 mag
 Object Magnitude          : V = 12.84 mag
 Estimated Magnitude Drop  : 1.5 mag
 Estimated Max. Duration   : 17.4 sec
 Object Mean Diameter      : 303 km  (src: astorb)
 Speed of the shadow       : 17.4 km/s
 Elongation to Moon & Sun  : 19° (sunlit = 62%), Sun = 86°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.8 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
(If error 404: link not valid which means no data available)

Aladin Sky Atlas
Aladin Lite direct link (has Gaia overlay)