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Stellar Occultation by (77791) 2001 QN49 on 2025-11-21 (18:41:21 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] : beb21c30-ddb8-11f0-547e-d8fec3d799c9 [observed]

 Occultation Date + Time   : 2025-11-21 at 18:41:21 UT +/- 0.05 min  [1]
 Object Designation        : (77791) 2001 QN49
 Star Designation          : GDR3 0060742902129742592
 Star Coordinates (ICRF)   : RA = 03 09 55.8480, DE = +21 23 31.249  [2]
 Star Magnitudes           : G = 13.79 mag, RP = 13.23 mag, BP = 14.17 mag
 Object Magnitude          : V = 19.0 mag
 Estimated Magnitude Drop  : 5.2 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 12.6 km/s
 Object Mean Diameter      : 4.0 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.4933 arcs/min @ PA = 256 deg
 Horizontal Parallax       : 4.1770 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 155° (sunlit = 2%), Sun = 171°
 Cross-track uncertainty   : 20.7 mas = 31 km = 7.90 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL43
 Note                      : FP:true

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


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