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2025-12-06 / UCAC4 558-045827 / (3933) Portugal

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Deborah Smith O+ VID M300 ES GPS 00:35:10 00:36:11.529 00:36:15.682 00:37:10 0.302 0.302 4.15 23.2
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

1 observation found in db: sodis

Available (probably) matching predictions (click on the link to switch):
JPL#67 : cebdc6b0-ddb8-11f0-547e-4d1dff77c1ab [db: observed]

Using prediction cebdc6b0-ddb8-11f0-547e-4d1dff77c1ab for map and profile fit

Get observations as KML file (reduced site location resolution)

Sky projection (artificial light) for occ. time: 2025-12-06, 00:36 UT (JD = 2461015.525)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 23531.58.561 313°, 43° 2.4496e611415.50.0° None2018-07-19 not scaled 2018-07-18
# 23541.58.561 133°, 46° 2.4496e611415.50.0° None2018-07-19 not scaled 2018-07-18
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : cebdc6b0-ddb8-11f0-547e-4d1dff77c1ab [observed]

 Occultation Date + Time   : 2025-12-06 at 00:23:53 UT +/- 0.01 min  [1]
 Object Designation        : (3933) Portugal
 Orbit Class               : MBA
 Star Designation          : GDR3 0676211818727120640
 Star Coordinates (ICRF)   : RA = 08 20 46.4524, DE = +21 31 10.825  [2]
 Star Magnitudes           : G = 14.93 mag, RP = 14.17 mag, BP = 15.56 mag
 Object Magnitude          : V = 18.34 mag
 Estimated Magnitude Drop  : 3.5 mag
 Estimated Max. Duration   : 1.9 sec
 Object Mean Diameter      : 10.4 km  (src: astorb)
 Speed of the shadow       : 5.6 km/s
 Elongation to Moon & Sun  : 34° (sunlit = 98%), Sun = 132°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.08 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#67
 Note                      : FP:true

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

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