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Stellar Occultation by (471318) 2011 JF31 on 2026-07-31 (01:47:51 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] : 89b46140-f94e-11ef-4809-600eddbbb58a [cetnos]

 Occultation Date + Time   : 2026-07-31 at 01:47:51 UT +/- 3.24 min  [1]
 Object Designation        : (471318) 2011 JF31
 Star Designation          : GDR3 6250061908367920896
 Star Coordinates (ICRF)   : RA = 16 06 49.2282, DE = -16 55 08.470  [2]
 Star Magnitudes           : G = 14.12 mag, RP = 13.31 mag, BP = 14.82 mag
 Object Magnitude          : V = 21.87 mag
 Estimated Magnitude Drop  : 7.7 mag
 Estimated Max. Duration   : 33.7 sec
 Speed of the shadow       : 8.5 km/s
 Object Mean Diameter      : 286.7 km  (src: CORA+astorb) => apparent = 9 mas
 Apparent Motion           : 0.0167 arcs/min @ PA = 282 deg
 Horizontal Parallax       : 0.2050 arcs
 Dynamical Class           : TNO
 Elongation to Moon & Sun  : 82° (sunlit = 98%), Sun = 115°
 Cross-track uncertainty   : 33.0 mas = 1026 km = 3.58 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#19

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


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