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Stellar Occultation by (1838) Ursa on 2025-01-17 (21:45:43 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
 Occultation UUID [and db] : c01ef570-87a6-11ef-78cd-98b217dbbd13 [asteroids]

 Occultation Date + Time   : 2025-01-17 at 21:45:43 UT +/- 0.0 min  [1]
 Object Designation        : (1838) Ursa
 Star Designation          : GDR3 0824558168063449856
 Star Coordinates (ICRF)   : RA = 09 35 21.8305, DE = +46 58 01.807  [2]
 Star Magnitudes           : G = 13.12 mag, RP = 12.61 mag, BP = 13.47 mag
 Object Magnitude          : V = 15.88 mag
 Estimated Magnitude Drop  : 2.8 mag
 Estimated Max. Duration   : 2.6 sec
 Object Mean Diameter      : 35 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 13.4 km/s
 Elongation to Moon & Sun  : 44° (sunlit = 84%), Sun = 147°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

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


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