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Stellar Occultation by (7990) 1981 SN1 on 2023-07-08 (00:17:09 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] : ce223c40-ddb3-11f0-547e-2618f6f3cda7 [observed]

 Occultation Date + Time   : 2023-07-08 at 00:17:09 UT +/- 0.0 min  [1]
 Object Designation        : (7990) 1981 SN1
 Star Designation          : GDR3 4071057839093714048
 Star Coordinates (ICRF)   : RA = 17 56 09.6653, DE = -20 42 59.321  [2]
 Star Magnitudes           : G = 13.22 mag, RP = 12.21 mag, BP = 14.28 mag
 Object Magnitude          : V = 18.28 mag
 Estimated Magnitude Drop  : 5.1 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 11.9 km/s
 Object Mean Diameter      : 5.3 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.5083 arcs/min @ PA = 267 deg
 Horizontal Parallax       : 4.5300 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 80° (sunlit = 73%), Sun = 163°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.08 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#55
 Note                      : FP:true

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


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