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Stellar Occultation by (169137) 2001 QM57 on 2023-07-22 (21:12:17 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] : d700e550-ddb3-11f0-547e-fd028be3c7ae [observed]

 Occultation Date + Time   : 2023-07-22 at 21:12:17 UT +/- 0.06 min  [1]
 Object Designation        : (169137) 2001 QM57
 Star Designation          : GDR3 6875000849889682176
 Star Coordinates (ICRF)   : RA = 20 29 52.0139, DE = -15 28 32.056  [2]
 Star Magnitudes           : G = 13.71 mag, RP = 12.68 mag, BP = 14.78 mag
 Object Magnitude          : V = 19.23 mag
 Estimated Magnitude Drop  : 5.5 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 12.5 km/s
 Object Mean Diameter      : 3.2 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.5367 arcs/min @ PA = 240 deg
 Horizontal Parallax       : 4.5720 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 130° (sunlit = 22%), Sun = 173°
 Cross-track uncertainty   : 18.7 mas = 26 km = 8.15 path-width (1-sig)
 RUWE and duplicate source : 1.12 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#38
 Note                      : FP:true

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


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