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Stellar Occultation by (591) Irmgard on 2023-12-23 (17:30:02 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] : da2bdf32-5465-445a-8582-06139bf32ef2 [observed]

 Occultation Date + Time   : 2023-12-23 at 17:30:02 UT +/- 0.02 min  [1]
 Object Designation        : (591) Irmgard
 Star Designation          : GDR3 0947300701226454912
 Star Coordinates (ICRF)   : RA = 06 58 54.7060, DE = +39 17 53.536  [2]
 Star Magnitudes           : G = 15.03 mag, RP = 14.46 mag, BP = 15.41 mag
 Object Magnitude          : V = 14.42 mag
 Estimated Magnitude Drop  : 0.5 mag
 Estimated Max. Duration   : 4.5 sec
 Object Mean Diameter      : 51.9 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 11.5 km/s
 Elongation to Moon & Sun  : 51° (sunlit = 89%), Sun = 161°
 Cross-track uncertainty   : 3.0 mas = 3 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 1.07 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63

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


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