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Stellar Occultation by (406) Erna on 2024-06-29 (01:55:49 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] : af3e9730-ddb1-11f0-547e-62c22f376efd [observed]

 Occultation Date + Time   : 2024-06-29 at 01:55:49 UT +/- 0.01 min  [1]
 Object Designation        : (406) Erna
 Star Designation          : GDR3 4052399367299255680
 Star Coordinates (ICRF)   : RA = 18 14 21.4333, DE = -27 45 04.216  [2]
 Star Magnitudes           : G = 14.57 mag, RP = 18.21 mag, BP = 19.44 mag
 Object Magnitude          : V = 14.05 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 4.5 sec
 Speed of the shadow       : 11.0 km/s
 Object Mean Diameter      : 49.2 km  (src: astorb) => apparent = 40 mas
 Apparent Motion           : 0.5317 arcs/min @ PA = 274 deg
 Horizontal Parallax       : 5.1230 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 97° (sunlit = 48%), Sun = 174°
 Cross-track uncertainty   : 2.8 mas = 3 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 8.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78
 Note                      : FP:true

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


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