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2021-05-08 / 4UC 469-071609 / (3317) Paris

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Jordi Marco O+ CCD M235 ES NTP 02:09:00 02:12:07.44 02:12:23.01 02:15:13 0.14 0.14 15.57 126.1
2 show Carles Schnabel O+ VID M400 ES GPS++ 02:09:18 02:12:10.07 02:12:25.53 02:14:57 0.06 0.04 15.46 125.2
3 show Ricard Casas O+ VID M200 ES GPS++ 02:11:03 02:12:08.99 02:12:24.31 02:13:15 0.32 0.32 15.32 124.1
4 show Joan Aragones O- CCD L102 ES 02:08:15 02:15:53
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

4 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#69 : 6395cb77-daad-40ce-aa51-c3f22ec00846 [db: observed]
JPL#69 : 0e028b3f-8329-469c-9837-72aea5526601 [db: observed]

Using prediction 6395cb77-daad-40ce-aa51-c3f22ec00846 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 = 141 x 87 km
a',b' = 70.6, 43.4 km
X0,Y0 = -1531.5, 18.8 km
Mean diameter = 111 km

From 3 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).

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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 6395cb77-daad-40ce-aa51-c3f22ec00846 [observed]

 Occultation Date + Time   : 2021-05-08 at 02:06:08 UT +/- 0.09 min  [1]
 Object Designation        : (3317) Paris
 Orbit Class               : JTRO
 Star Designation          : GDR3 4470250103974848896
 Star Coordinates (ICRF)   : RA = 18 11 00.7942, DE = +03 44 15.714  [2]
 Star Magnitudes           : G = 12.62 mag, RP = 11.58 mag, BP = 13.72 mag
 Object Magnitude          : V = 15.36 mag
 Estimated Magnitude Drop  : 2.8 mag
 Estimated Max. Duration   : 14.4 sec
 Object Mean Diameter      : 116 km  (src: astorb)
 Speed of the shadow       : 8.1 km/s
 Elongation to Moon & Sun  : 96° (sunlit = 12%), Sun = 129°
 Cross-track uncertainty   : 4.3 mas = 12 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 1.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#69

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

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