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Stellar Occultation by (8340) Mumma on 2025-09-19 (19:27:56 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] : 75a61e20-ddb7-11f0-547e-438bffaea9e4 [observed]

 Occultation Date + Time   : 2025-09-19 at 19:27:56 UT +/- 0.01 min  [1]
 Object Designation        : (8340) Mumma
 Star Designation          : GDR3 4086326134182665984
 Star Coordinates (ICRF)   : RA = 18 51 40.8604, DE = -19 05 16.358  [2]
 Star Magnitudes           : G = 12.96 mag, RP = 12.13 mag, BP = 13.69 mag
 Object Magnitude          : V = 17.55 mag
 Estimated Magnitude Drop  : 4.6 mag
 Estimated Max. Duration   : 1.4 sec
 Speed of the shadow       : 8.9 km/s
 Object Mean Diameter      : 12.2 km  (src: astorb) => apparent = 7 mas
 Apparent Motion           : 0.2950 arcs/min @ PA = 80 deg
 Horizontal Parallax       : 3.5120 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 128° (sunlit = 4%), Sun = 105°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.10 path-width (1-sig)
 RUWE and duplicate source : 1.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#76
 Note                      : FP:true

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


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