Collaborative Occultation
Resources and Archive
CORA

Occultations | Observations | Reports | Info + Credits | JOA | Admin | Login

2025-10-03 / UCAC4 503-004006 / (1517) Beograd

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Marek Zawilski, Mieczyslaw Borkowski, +1 O+ VID M200 PL GPS 03:02:00 03:03:02.50 03:03:07.92 03:04:08 0.120 0.120 5.42 46.1
2 show Piotr Walczak O+ CCD M130 PL GPS 03:02:03 03:03:02.46 03:03:07.96 03:04:04 0.130 0.120 5.50 46.8
3 show Daniel Antuszewicz O- VID M300 PL NTP 03:01:56 :: :: 03:03:55
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

3 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#71 : 816a3e70-ddb8-11f0-547e-fa12c7eef79e [db: observed]

Using prediction 816a3e70-ddb8-11f0-547e-fa12c7eef79e 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:
Circular profile fit was not successful ...








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.

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : 816a3e70-ddb8-11f0-547e-fa12c7eef79e [observed]

 Occultation Date + Time   : 2025-10-03 at 03:09:46 UT +/- 0.01 min  [1]
 Object Designation        : (1517) Beograd
 Orbit Class               : MBA
 Star Designation          : GDR3 0024901125166156288
 Star Coordinates (ICRF)   : RA = 02 36 34.1858, DE = +10 35 29.854  [2]
 Star Magnitudes           : G = 12.82 mag, RP = 12.28 mag, BP = 13.19 mag
 Object Magnitude          : V = 15.56 mag
 Estimated Magnitude Drop  : 2.8 mag
 Estimated Max. Duration   : 4.3 sec
 Object Mean Diameter      : 36.2 km  (src: astorb)
 Speed of the shadow       : 8.5 km/s
 Elongation to Moon & Sun  : 83° (sunlit = 80%), Sun = 150°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#71
 Note                      : FP:true

 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)