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2021-11-30 / 4UC 577-016317 / (1517) Beograd

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Yves Argentin O+ VID M305 FR GPS++ 19:50:26 19:51:07.37 19:51:10.57 19:51:54 0.16 0.16 3.20 38.7
2 show Gerard Vaudescal O+ CCD M254 FR NTP+ 19:50:04 19:51:06.96 19:51:10.35 19:52:20 0.28 0.28 3.39 41.0
3 show Alberto Ossola O+ VID M230 CH GPS++ 19:48:56 19:50:31.49 19:50:35.01 19:52:01 0.32 0.32 3.52 42.6
4 show Andrea Manna O+ VID M200 CH GPS++ 19:49:29 19:50:30.92 19:50:34.12 19:52:02 0.32 0.32 3.20 38.7
5 show Stefano Sposetti O+ CCD M420 CH GPS++ 19:47:30 19:50:30.66 19:50:34.16 19:53:30 0.25 0.25 3.50 42.4
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

5 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#57 : 9e7c39dc-598d-4fb9-baae-1dff6e48c122 [db: observed]

Using prediction 9e7c39dc-598d-4fb9-baae-1dff6e48c122 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:
Ellipse profile fit was not successful. Trying circular fit.

Circular diameter = 45 km

From 5 chords (VID,CCD)








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Map with groundtrack and observer stations

Event Details 
 Occultation UUID [and DB] : 9e7c39dc-598d-4fb9-baae-1dff6e48c122 [observed]

 Occultation Date + Time   : 2021-11-30 at 19:44:27 UT +/- 0.02 min  [1]
 Object Designation        : (1517) Beograd
 Orbit Class               : MBA
 Star Designation          : GDR3 3417017436000478848
 Star Coordinates (ICRF)   : RA = 05 33 44.2143, DE = +25 21 40.463  [2]
 Star Magnitudes           : G = 14.1 mag, RP = 13.52 mag, BP = 14.5 mag
 Object Magnitude          : V = 15.48 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 3.0 sec
 Object Mean Diameter      : 36 km  (src: astorb)
 Speed of the shadow       : 12.1 km/s
 Elongation to Moon & Sun  : 116° (sunlit = 17%), Sun = 165°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#57

 Object is a Gaia mass determination target !

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

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