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Stellar Occultation by (1909) Alekhin on 2021-09-18 (20:04:52 UT)



Event Details
 Occultation UUID [and db] : 20dbc5b2-aafd-4da0-b257-37c77841726c [observed]

 Occultation Date + Time   : 2021-09-18 at 20:04:52 UT +/- 0.02 min  [1]
 Object Designation        : (1909) Alekhin
 Star Designation          : GDR3 2617866477688597632
 Star Coordinates (ICRF)   : RA = 21 53 29.9605, DE = -09 56 17.711  [2]
 Star Magnitudes           : G = 10.45 mag, RP = 10.07 mag, BP = 10.69 mag
 Object Magnitude          : V = 16.48 mag
 Estimated Magnitude Drop  : 6.0 mag
 Estimated Max. Duration   : 2.5 sec
 Object Mean Diameter      : 17 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 6.8 km/s
 Elongation to Moon & Sun  : 8° (sunlit = 95%), Sun = 151°
 Cross-track uncertainty   : 2.3 mas = 2 km = 0.15 path-width (1-sig)
 RUWE and duplicate source : 1.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#58

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


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