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Stellar Occultation by (1311) Knopfia on 2025-12-06 (17:31:34 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] : d37a8b70-ddb8-11f0-547e-52aafdef572e [observed]

 Occultation Date + Time   : 2025-12-06 at 17:31:34 UT +/- 0.0 min  [1]
 Object Designation        : (1311) Knopfia
 Star Designation          : GDR3 2622551286281938176
 Star Coordinates (ICRF)   : RA = 22 23 29.8986, DE = -07 12 34.267  [2]
 Star Magnitudes           : G = 12.69 mag, RP = 12.13 mag, BP = 13.09 mag
 Object Magnitude          : V = 17.45 mag
 Estimated Magnitude Drop  : 4.8 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 22.1 km/s
 Object Mean Diameter      : 14.1 km  (src: astorb) => apparent = 8 mas
 Apparent Motion           : 0.7450 arcs/min @ PA = 72 deg
 Horizontal Parallax       : 3.5770 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 124° (sunlit = 95%), Sun = 80°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#73
 Note                      : FP:true

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


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