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Stellar Occultation by (171) Ophelia on 2023-07-08 (21:42:22 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] : 4b807de0-ddb0-11f0-547e-eafde7ab9512 [observed]

 Occultation Date + Time   : 2023-07-08 at 21:42:22 UT +/- 0.01 min  [1]
 Object Designation        : (171) Ophelia
 Star Designation          : GDR3 4068709282260118272
 Star Coordinates (ICRF)   : RA = 17 50 32.5238, DE = -22 58 40.128  [2]
 Star Magnitudes           : G = 14.03 mag, RP = 12.66 mag, BP = 16.29 mag
 Object Magnitude          : V = 13.45 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 9.9 sec
 Speed of the shadow       : 11.8 km/s
 Object Mean Diameter      : 116.7 km  (src: astorb) => apparent = 70 mas
 Apparent Motion           : 0.4250 arcs/min @ PA = 267 deg
 Horizontal Parallax       : 3.8330 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 94° (sunlit = 63%), Sun = 161°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.92 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL157
 Note                      : FP:true

 Object is a <Gaia mass determination> target !

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


More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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