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Stellar Occultation by (27157) 1998 YK27 on 2023-05-31 (21:40:38 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] : a1c08a80-ddb3-11f0-547e-70231efa46f1 [observed]

 Occultation Date + Time   : 2023-05-31 at 21:40:38 UT +/- 0.01 min  [1]
 Object Designation        : (27157) 1998 YK27
 Star Designation          : GDR3 4093430353687836800
 Star Coordinates (ICRF)   : RA = 18 35 44.9627, DE = -18 16 31.345  [2]
 Star Magnitudes           : G = 12.89 mag, RP = 11.99 mag, BP = 13.73 mag
 Object Magnitude          : V = 18.37 mag
 Estimated Magnitude Drop  : 5.5 mag
 Estimated Max. Duration   : 0.7 sec
 Speed of the shadow       : 8.8 km/s
 Object Mean Diameter      : 6.0 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.3533 arcs/min @ PA = 278 deg
 Horizontal Parallax       : 4.2700 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 70° (sunlit = 88%), Sun = 151°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#61
 Note                      : FP:true

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


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