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Stellar Occultation by (12721) 1991 PB on 2023-09-04 (19:28:41 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] : fdf98cc0-ddb3-11f0-547e-5dfc7dd9ec70 [observed]

 Occultation Date + Time   : 2023-09-04 at 19:28:41 UT +/- 0.0 min  [1]
 Object Designation        : (12721) 1991 PB
 Star Designation          : GDR3 4115093520223240320
 Star Coordinates (ICRF)   : RA = 17 21 57.2011, DE = -21 06 33.606  [2]
 Star Magnitudes           : G = 13.49 mag, RP = 12.42 mag, BP = 14.68 mag
 Object Magnitude          : V = 17.3 mag
 Estimated Magnitude Drop  : 3.9 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 14.1 km/s
 Object Mean Diameter      : 5.7 km  (src: astorb) => apparent = 6 mas
 Apparent Motion           : 0.8400 arcs/min @ PA = 100 deg
 Horizontal Parallax       : 6.3280 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 145° (sunlit = 72%), Sun = 99°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#56
 Note                      : FP:true

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


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