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2022-01-14 / 4UC 516-046241 / (190) Ismene

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Antoni Selva O+ VID M400 ES GPS++ 23:22:07 23:23:56.28 23:24:11.44 23:26:06 0.12 0.08 15.16 195.6
2 show J. Prat/P. Martorell O+ VID M310 ES GPS++ 23:23:01 23:24:17.95 23:24:33.22 23:26:01 0.76 0.28 15.27 197.0
3 show Esteban Fernandez O+ CCD M300 ES GPS+ 23:24:24 23:24:37.94 23:24:53.84 23:25:59 1.43 1.43 15.90 205.1
4 show Gerard Vaudescal O+ CCD M254 FR GPS+ 23:23:02 23:24:10.79 23:24:20.59 23:25:31 0.10 0.10 9.80 126.4
5 show Faustino Garcia O+ CCD M250 ES GPS++ 23:23:58 23:24:43.37 23:24:58.89 23:25:53 0.20 0.20 15.52 200.2
6 show Alfonso Noschese O- CCD M300 IT 23:19:44 23:25:45
7 show Pascal Andre O- VID M200 FR 23:19:57 23:28:24
8 show J.J. Castellani O- VID M400 FR 23:23:09 21:25:13
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

8 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#131 : a51edcd5-abd7-402b-995f-26cb57a6da23 [db: observed]
JPL#131 : 05441ca5-e110-45e7-a46b-4acbc2876e99 [db: observed]

Using prediction a51edcd5-abd7-402b-995f-26cb57a6da23 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 = 221 x 124 km
a',b' = 110.3, 62.2 km
X0,Y0 = -706.5, 39.3 km
Mean diameter = 166 km

From 5 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).
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Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : a51edcd5-abd7-402b-995f-26cb57a6da23 [observed]

 Occultation Date + Time   : 2022-01-14 at 23:21:43 UT +/- 0.04 min  [1]
 Object Designation        : (190) Ismene
 Orbit Class               : MBA
 Star Designation          : GDR3 0653335448518724736
 Star Coordinates (ICRF)   : RA = 08 00 28.4032, DE = +13 05 19.030  [2]
 Star Magnitudes           : G = 13.58 mag, RP = 13.2 mag, BP = 13.81 mag
 Object Magnitude          : V = 12.79 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 6.9 sec
 Object Mean Diameter      : 89 km  (src: astorb)
 Speed of the shadow       : 12.9 km/s
 Elongation to Moon & Sun  : 39° (sunlit = 92%), Sun = 171°
 Cross-track uncertainty   : 2.7 mas = 4 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#131

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

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