Cora»OccDetail

Stellar Occultation by (3633) Mira on 2023-09-14 (18:18:38 UT)

Event Details
Occultation UUID [and db] : 08d6ec00-ddb4-11f0-547e-51a6fefe6a70 [observed] Occultation Date + Time : 2023-09-14 at 18:18:38 UT +/- 0.02 min [1] Object Designation : (3633) Mira Star Designation : GDR3 4086311260748989696 Star Coordinates (ICRF) : RA = 18 47 48.0172, DE = -18 56 20.049 [2] Star Magnitudes : G = 13.98 mag, RP = 20.56 mag, BP = 21.77 mag Object Magnitude : V = 18.38 mag Estimated Magnitude Drop : 4.4 mag Estimated Max. Duration : 0.7 sec Speed of the shadow : 7.7 km/s Object Mean Diameter : 5.7 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.3250 arcs/min @ PA = 94 deg Horizontal Parallax : 4.5060 arcs Dynamical Class : MBA Elongation to Moon & Sun : 113° (sunlit = 0%), Sun = 110° Cross-track uncertainty : 5.2 mas = 7 km = 1.29 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#62 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

Occultation UUID [and db] : 08d6ec00-ddb4-11f0-547e-51a6fefe6a70 [observed] Occultation Date + Time : 2023-09-14 at 18:18:38 UT +/- 0.02 min [1] Object Designation : (3633) Mira Star Designation : GDR3 4086311260748989696 Star Coordinates (ICRF) : RA = 18 47 48.0172, DE = -18 56 20.049 [2] Star Magnitudes : G = 13.98 mag, RP = 20.56 mag, BP = 21.77 mag Object Magnitude : V = 18.38 mag Estimated Magnitude Drop : 4.4 mag Estimated Max. Duration : 0.7 sec Speed of the shadow : 7.7 km/s Object Mean Diameter : 5.7 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.3250 arcs/min @ PA = 94 deg Horizontal Parallax : 4.5060 arcs Dynamical Class : MBA Elongation to Moon & Sun : 113° (sunlit = 0%), Sun = 110° Cross-track uncertainty : 5.2 mas = 7 km = 1.29 path-width (1-sig) RUWE and duplicate source : 1.03 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#62 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

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Apply ephem. offset (O-C) in RA & DE and CTU:
CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.