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Stellar Occultation by (12257) Lassine on 2026-09-29 (19:40:28 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] : 36ce6ca0-d9b2-11f1-43f3-48fdedd7d923 [observed]

 Occultation Date + Time   : 2026-09-29 at 19:40:28 UT +/- 0.0 min  [1]
 Object Designation        : (12257) Lassine
 Star Designation          : GDR3 4205592466906370688
 Star Coordinates (ICRF)   : RA = 18 57 15.9081, DE = -07 22 50.583  [2]
 Star Magnitudes           : G = 13.06 mag, RP = 11.88 mag, BP = 14.53 mag
 Object Magnitude          : V = 18.74 mag
 Estimated Magnitude Drop  : 5.7 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 16.3 km/s
 Object Mean Diameter      : 5.1 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.6550 arcs/min @ PA = 109 deg
 Horizontal Parallax       : 4.2640 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 119° (sunlit = 88%), Sun = 98°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.12 path-width (1-sig)
 RUWE and duplicate source : 1.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL58
 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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