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2023-10-08 / HIP 769 / (1340) Yvette

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Christophe Cote O+ VID M200 FR NTP 20:26:08 20:31:52.7 20:31:55.2 20:36:04 0.5 0.5 2.50 35.2
2 show Pierre Le Cam O+ VID M500 FR GPS 20:31:25 20:31:50.897 20:31:52.861 20:32:25 0.015 0.015 1.96 27.6
3 show Jean-Louis Dumont O+ VID M400 FR GPS 20:30:00 20:31:49.07 20:31:51.43 20:34:00 0.02 0.02 2.36 33.3
4 show Lionel Rousselot O+ VID L80 FR GPS 20:30:01 20:31:43.22 20:31:45.76 20:34:02 0.02 0.02 2.54 35.8
5 show Stefano Sposetti O- VID M420 CH GPS 20:29:00 20:34:00
6 show Arnaud Leroy O- VID M250 FR GPS 20:30:08 20:33:07
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: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#59 : 0a6ed069-f1e9-4232-9658-a65e9f095462 [db: observed]

Using prediction 0a6ed069-f1e9-4232-9658-a65e9f095462 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 = 217 x 18 km
a',b' = 108.3, 9.0 km
X0,Y0 = 2159.8, 8.7 km
Mean diameter = 62 km

From 4 chords (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).
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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 0a6ed069-f1e9-4232-9658-a65e9f095462 [observed]

 Occultation Date + Time   : 2023-10-08 at 20:31:12 UT +/- 0.02 min  [1]
 Object Designation        : (1340) Yvette
 Orbit Class               : MBA
 Star Designation          : GDR3 2546561151467110784
 Star Coordinates (ICRF)   : RA = 00 09 28.0835, DE = +01 14 38.670  [2]
 Star Magnitudes           : G = 6.93 mag, RP = 6.19 mag, BP = 7.52 mag
 Object Magnitude          : V = 16.35 mag
 Estimated Magnitude Drop  : 9.4 mag
 Estimated Max. Duration   : 1.8 sec
 Object Mean Diameter      : 26 km  (src: astorb)
 Speed of the shadow       : 14.1 km/s
 Elongation to Moon & Sun  : 128° (sunlit = 29%), Sun = 167°
 Cross-track uncertainty   : 3.0 mas = 5 km = 0.22 path-width (1-sig)
 RUWE and duplicate source : 0.88 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#59

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

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