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Stellar Occultation by (73972) 1998 BA18 on 2025-11-17 (20:51:11 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] : c381a5a0-ddb8-11f0-547e-274aff5f2953 [observed]

 Occultation Date + Time   : 2025-11-17 at 20:51:11 UT +/- 0.0 min  [1]
 Object Designation        : (73972) 1998 BA18
 Star Designation          : GDR3 0237795610287119872
 Star Coordinates (ICRF)   : RA = 03 28 44.2820, DE = +41 47 03.563  [2]
 Star Magnitudes           : G = 14.03 mag, RP = 13.26 mag, BP = 14.67 mag
 Object Magnitude          : V = 18.67 mag
 Estimated Magnitude Drop  : 4.7 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 13.4 km/s
 Object Mean Diameter      : 5.9 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4867 arcs/min @ PA = 260 deg
 Horizontal Parallax       : 3.8660 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 145° (sunlit = 5%), Sun = 157°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.20 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL53
 Note                      : FP:true

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


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