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Stellar Occultation by (407) Arachne on 2026-09-27 (18:10:17 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] : 17cb46c0-d9b2-11f1-43f3-b754a2fef373 [observed]

 Occultation Date + Time   : 2026-09-27 at 18:10:17 UT +/- 0.0 min  [1]
 Object Designation        : (407) Arachne
 Star Designation          : GDR3 4078989711566202112
 Star Coordinates (ICRF)   : RA = 18 48 13.0896, DE = -21 30 53.478  [2]
 Star Magnitudes           : G = 14.69 mag, RP = 13.76 mag, BP = 15.6 mag
 Object Magnitude          : V = 14.02 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 6.9 sec
 Speed of the shadow       : 13.7 km/s
 Object Mean Diameter      : 95.1 km  (src: astorb) => apparent = 59 mas
 Apparent Motion           : 0.5100 arcs/min @ PA = 77 deg
 Horizontal Parallax       : 3.9410 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 97° (sunlit = 99%), Sun = 97°
 Cross-track uncertainty   : 0.8 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL80
 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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