Collaborative Occultation Resources and Archive (CORA)

 Occultation UUID [and db] : c9b9180f-ca14-4c7f-bf3b-529daecd6567 [observed]

 Occultation Date + Time   : 2020-01-18 at 18:35:47 UT +/- 0.04 min  [1]
 Object Designation        : (51921) 2001 QU90
 Star Designation          : GDR3 0115617981284520960
 Star Coordinates (ICRF)   : RA = 03 07 00.8461, DE = +27 05 17.347  [2]
 Star Magnitudes           : G = 12.79 mag, RP = 12.25 mag, BP = 13.16 mag
 Object Magnitude          : V = 17.07 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 0.5 sec
 Object Mean Diameter      : 7 km  (src: astorb+H10)
 Speed of the shadow       : 15.1 km/s
 Elongation to Moon & Sun  : 164° (sunlit = 37%), Sun = 113°
 Cross-track uncertainty   : 7.3 mas = 8 km = 1.11 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#31 (23-01-08)

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