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Stellar Occultation by (177) Irma on 2011-09-13 (01:53:39 UT)



Event Details
 Occultation UUID [and db] : 495f1144-c0fb-4e6e-ba57-a4eb27aa8816 [observed]

 Occultation Date + Time   : 2011-09-13 at 01:53:39 UT +/- 0.01 min  [1]
 Object Designation        : (177) Irma
 Star Designation          : GDR3 3428617249315895808
 Star Coordinates (ICRF)   : RA = 05 45 30.5305, DE = +24 47 46.089  [2]
 Star Magnitudes           : G = 9.42 mag, RP = 9.16 mag, BP = 9.55 mag
 Object Magnitude          : V = 14.14 mag
 Estimated Magnitude Drop  : 4.7 mag
 Estimated Max. Duration   : 3.4 sec
 Object Mean Diameter      : 73 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 21.6 km/s
 Elongation to Moon & Sun  : 89° (sunlit = 100%), Sun = 83°
 Cross-track uncertainty   : 0.9 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 7.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#115

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


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