Occultation event with (32475) 00SD234, event index number 3869
Regions able to see the event: US
Geocentric closest approach at 2026/07/20 11:22:14 UTC
J2000 position of star is 04:16:57.5 +41:12:26
Equinox of date position of star is 04:18:47.2 +41:16:15
Star is 126 degrees from the moon. Moon is 40% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.25 seconds with the standard RECON-QHY system.
SNR of 7.3 per integration for unocculted signal
Expected flux drop is 91% with SNR of 6.6 for the occulted depth (per occulted point)
Apparent velocity is 33.2 km/sec on the sky relative to the star, or, 27.5 arcsec/hr.
Position angle of asteroid motion is 59.2 degrees
The recommended exposure time corresponds to 8.3 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 20.2 km.
The sky-plane scale is 4351.1 km/arcsec.
Diameter estimates:
41.9 km assuming a 5% albedo, maximum of 1.3 sec for a central chord
17.1 km assuming a 30% albedo, maximum of 0.5 sec for a central chord
Cross-track diameter of 38.4 km used for deployment plan.
Star training set for 32475_00SD234, (2026/07/20 11:22UT) Object RA Dec mag sep mel Aldebaran 04:37:26.8 +16:33:38 0.8 25.04 126 44Zet Per 03:55:48.5 +31:57:37 2.8 10.38 133 52 Per 04:16:42.2 +40:32:54 4.7 0.82 126 PPM 046979 04:20:58.2 +41:00:24 8.4 0.49 125 PPM 046933 04:17:44.3 +41:40:08 8.8 0.44 126 PPM 046973 04:20:28.7 +41:20:29 10.4 0.33 125 32475_00SD234 04:18:47.2 +41:16:15 16.7 125 Positions are for equinox of date
Star training set for 32475_00SD234, (2026/07/20 11:22UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 25.04 126 44Zet Per 03:54:07.9 +31:53:01 2.8 10.38 133 52 Per 04:14:53.3 +40:29:01 4.7 0.82 126 PPM 046979 04:19:08.7 +40:56:40 8.4 0.49 125 PPM 046933 04:15:54.2 +41:36:17 8.8 0.44 126 PPM 046973 04:18:38.9 +41:16:43 10.4 0.33 125 32475_00SD234 04:16:57.5 +41:12:26 16.7 126 Positions are for J2000