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Stellar Occultation by (124) Alkeste on 2025-10-23 (17:57:03 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] : 9d08b580-ddb8-11f0-547e-3c8bf97f8ed3 [observed]

 Occultation Date + Time   : 2025-10-23 at 17:57:03 UT +/- 0.0 min  [1]
 Object Designation        : (124) Alkeste
 Star Designation          : GDR3 4091887635792205696
 Star Coordinates (ICRF)   : RA = 18 30 18.9967, DE = -20 42 14.688  [2]
 Star Magnitudes           : G = 11.72 mag, RP = 10.81 mag, BP = 12.59 mag
 Object Magnitude          : V = 13.2 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 2.5 sec
 Speed of the shadow       : 30.6 km/s
 Object Mean Diameter      : 76.4 km  (src: astorb) => apparent = 39 mas
 Apparent Motion           : 0.9383 arcs/min @ PA = 89 deg
 Horizontal Parallax       : 3.2540 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 43° (sunlit = 4%), Sun = 67°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.73 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL164
 Note                      : FP:true

 
 [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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