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Stellar Occultation by (18691) 1998 HE1 on 2024-12-20 (19:58:13 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] : c4fdc5b0-ddb5-11f0-547e-131cdefbb0d2 [observed]

 Occultation Date + Time   : 2024-12-20 at 19:58:13 UT +/- 0.0 min  [1]
 Object Designation        : (18691) 1998 HE1
 Star Designation          : GDR3 0890205781110942720
 Star Coordinates (ICRF)   : RA = 07 16 46.6410, DE = +32 38 25.037  [2]
 Star Magnitudes           : G = 12.2 mag, RP = 12.23 mag, BP = 12.19 mag
 Object Magnitude          : V = 18.85 mag
 Estimated Magnitude Drop  : 6.7 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 14.5 km/s
 Object Mean Diameter      : 6.9 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4483 arcs/min @ PA = 283 deg
 Horizontal Parallax       : 3.2820 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 50° (sunlit = 70%), Sun = 160°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.11 path-width (1-sig)
 RUWE and duplicate source : 1.06 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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