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Stellar Occultation by (29P) Schwassmann-Wachmann 1 on 2023-05-21 (21:35:57 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] : da2f2c54-7d6c-4f12-a56e-8aeeaf7efd0b [archived]

 Occultation Date + Time   : 2023-05-21 at 21:35:57 UT +/- 0.0 min  [1]
 Object Designation        : (29P) Schwassmann-Wachmann 1
 Star Designation          : GDR3 3385051403166769024
 Star Coordinates (ICRF)   : RA = 06 50 31.1768, DE = +26 28 56.582  [2]
 Star Magnitudes           : G = 10.5 mag, RP = 9.74 mag, BP = 11.13 mag
 Object Magnitude          : V = 18.3 mag
 Estimated Magnitude Drop  : 7.8 mag
 Estimated Max. Duration   : 1.8 sec
 Speed of the shadow       : 34.0 km/s
 Object Mean Diameter      : 60.0 km  (src: CORA) => apparent = 12 mas
 Apparent Motion           : 0.4117 arcs/min @ PA = 100 deg
 Horizontal Parallax       : 1.2880 arcs
 Dynamical Class           : 
 Elongation to Moon & Sun  : 14° (sunlit = 5%), Sun = 41°
 Cross-track uncertainty   : 0.4 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : CORAv4 (23-03-31)
 Note                      : CORAv4: 626 obs. (20090217-20230128) including 3 occ. (2022,2023)

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


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